2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 785
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the EBCM.
7. Verify the scan tool BMC Primary Piston Position Sensor B parameter is less than 1 V.
瀚慖f greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the EBCM.
8. Install a 3A fused jumper wire between the signal circuit terminal 1 and the 5 V reference circuit terminal 2. Verify the scan tool BMC
Primary Piston Position Sensor B parameter is greater than 4.5 V.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the EBCM.
9. If all circuits test normal, replace the brake master cylinder piston position sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Brake Master Cylinder Primary Piston Position Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control
Systems/Braking Sensor/Switch/Service and Repair)
* Brake Pressure Modulator Valve Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Hydraulic
Control Assembly - Antilock Brakes/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming
C12B2
DTC C012A, C128B, C128E, or C12B2-C12B4
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC C012A 00
- Master Cylinder Pressure Sensor
DTC C128E
- Master Cylinder Pressure Sensor
DTC C012A 01
- Master Cylinder Pressure Sensor Short to Battery
DTC C12B3
- Master Cylinder Pressure Sensor Short to Battery
DTC C012A 06
- Master Cylinder Pressure Sensor Short to Ground or Open
DTC C12B2
- Master Cylinder Pressure Sensor Short to Ground or Open
DTC C012A 11
- Master Cylinder Pressure Sensor Above Maximum Threshold
DTC C128B
- Master Cylinder Pressure Sensor Above Maximum Threshold
DTC C012A 0F
- Master Cylinder Pressure Sensor Erratic
DTC C12B4
- Master Cylinder Pressure Sensor Erratic
Showing posts with label 瀚慖f less than the specified range. Show all posts
Showing posts with label 瀚慖f less than the specified range. Show all posts
Tuesday, December 10, 2019
Saturday, December 7, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 734
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 734
瀚慖f less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the
BCM.
3. Test for greater than 9 volts between the signal circuit terminal C and ground while commanding the rear window DOWN by using the
window switch on the driver master control.
瀚慖f less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the
BCM.
4. If all circuits test normal, replace the rear window switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Rear Side Door Window Switch Replacement (See: Windows and Glass/Windows/Service and Repair/Rear Side Door Window Switch
Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming
B3824
DTC B3821 or B3824
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B3821 00
- Left Rear Window Relay Power Circuit
DTC B3824 00
- Right Rear Window Relay Power Circuit
Diagnostic Fault Information
瀚慖f less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the
BCM.
3. Test for greater than 9 volts between the signal circuit terminal C and ground while commanding the rear window DOWN by using the
window switch on the driver master control.
瀚慖f less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the
BCM.
4. If all circuits test normal, replace the rear window switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Rear Side Door Window Switch Replacement (See: Windows and Glass/Windows/Service and Repair/Rear Side Door Window Switch
Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming
B3824
DTC B3821 or B3824
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B3821 00
- Left Rear Window Relay Power Circuit
DTC B3824 00
- Right Rear Window Relay Power Circuit
Diagnostic Fault Information
Saturday, November 30, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 571
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 571
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
B2430 0A, B2430 0B, B2430 0C, B2430 0D, B2430 0E, B2430 04, or B2430 1F
1. Ignition OFF, disconnect the X1 harness connector at the HSM.
Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat
unoccupied, then with the seat occupied.
2. Test for 2.0 - 8.0 Ohms between control circuit terminal 3 and control circuit terminal 2.
瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heater
element.
瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat cushion
heater element.
3. Disconnect the X2, X4 harness connectors at the HSM.
4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 20 X4 and the low reference circuit terminal 8 X2.
瀚慖f less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat
cushion heater element/temperature sensor.
瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits
test normal, replace the seat cushion heater element/temperature sensor.
5. Connect the X1, X2, X4 harness connectors at the HSM.
6. Disconnect the harness connector at the seat cushion heater element/temperature sensor.
7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Driver or Passenger Seat Cushion Heater Replacement (without HP2) ()Driver or Passenger Seat Cushion Heater Replacement (with HP2)
()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HSM replacement, setup, and programming
Dealer Installed
DTC B2425 or B2430 (Dealer Installed)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B2425 04
- Left Seat Heater Cushion Circuit Open
DTC B2425 0A
- Left Seat Heater Cushion Circuit Rate of Change Below Threshold
DTC B2425 0B
- Left Seat Heater Cushion Circuit Current Above Threshold
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
B2430 0A, B2430 0B, B2430 0C, B2430 0D, B2430 0E, B2430 04, or B2430 1F
1. Ignition OFF, disconnect the X1 harness connector at the HSM.
Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat
unoccupied, then with the seat occupied.
2. Test for 2.0 - 8.0 Ohms between control circuit terminal 3 and control circuit terminal 2.
瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heater
element.
瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat cushion
heater element.
3. Disconnect the X2, X4 harness connectors at the HSM.
4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 20 X4 and the low reference circuit terminal 8 X2.
瀚慖f less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat
cushion heater element/temperature sensor.
瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits
test normal, replace the seat cushion heater element/temperature sensor.
5. Connect the X1, X2, X4 harness connectors at the HSM.
6. Disconnect the harness connector at the seat cushion heater element/temperature sensor.
7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Driver or Passenger Seat Cushion Heater Replacement (without HP2) ()Driver or Passenger Seat Cushion Heater Replacement (with HP2)
()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HSM replacement, setup, and programming
Dealer Installed
DTC B2425 or B2430 (Dealer Installed)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B2425 04
- Left Seat Heater Cushion Circuit Open
DTC B2425 0A
- Left Seat Heater Cushion Circuit Rate of Change Below Threshold
DTC B2425 0B
- Left Seat Heater Cushion Circuit Current Above Threshold
Friday, November 29, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 560
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 560
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
B2430 0A, B2430 0B, B2430 0C, B2430 0D, B2430 0E, B2430 04, or B2430 1F
1. Ignition OFF, disconnect the X1 harness connector at the HSM.
Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat
unoccupied, then with the seat occupied.
2. Test for 2.0 - 8.0 Ohms between control circuit terminal 3 and control circuit terminal 2.
瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heater
element.
瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat cushion
heater element.
3. Disconnect the X2, X4 harness connectors at the HSM.
4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 20 X4 and the low reference circuit terminal 8 X2.
瀚慖f less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat
cushion heater element/temperature sensor.
瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits
test normal, replace the seat cushion heater element/temperature sensor.
5. Connect the X1, X2, X4 harness connectors at the HSM.
6. Disconnect the harness connector at the seat cushion heater element/temperature sensor.
7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Driver or Passenger Seat Cushion Heater Replacement (without HP2) ()Driver or Passenger Seat Cushion Heater Replacement (with HP2)
()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HSM replacement, setup, and programming
Dealer Installed
DTC B2425 or B2430 (Dealer Installed)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B2425 04
- Left Seat Heater Cushion Circuit Open
DTC B2425 0A
- Left Seat Heater Cushion Circuit Rate of Change Below Threshold
DTC B2425 0B
- Left Seat Heater Cushion Circuit Current Above Threshold
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
B2430 0A, B2430 0B, B2430 0C, B2430 0D, B2430 0E, B2430 04, or B2430 1F
1. Ignition OFF, disconnect the X1 harness connector at the HSM.
Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat
unoccupied, then with the seat occupied.
2. Test for 2.0 - 8.0 Ohms between control circuit terminal 3 and control circuit terminal 2.
瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heater
element.
瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat cushion
heater element.
3. Disconnect the X2, X4 harness connectors at the HSM.
4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 20 X4 and the low reference circuit terminal 8 X2.
瀚慖f less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat
cushion heater element/temperature sensor.
瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits
test normal, replace the seat cushion heater element/temperature sensor.
5. Connect the X1, X2, X4 harness connectors at the HSM.
6. Disconnect the harness connector at the seat cushion heater element/temperature sensor.
7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Driver or Passenger Seat Cushion Heater Replacement (without HP2) ()Driver or Passenger Seat Cushion Heater Replacement (with HP2)
()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HSM replacement, setup, and programming
Dealer Installed
DTC B2425 or B2430 (Dealer Installed)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B2425 04
- Left Seat Heater Cushion Circuit Open
DTC B2425 0A
- Left Seat Heater Cushion Circuit Rate of Change Below Threshold
DTC B2425 0B
- Left Seat Heater Cushion Circuit Current Above Threshold
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瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
B2180 0A, B2180 0B, B2180 0C, B2180 0D, B2180 0E, B2180 04, or B2180 1F
1. Ignition OFF, disconnect the X1 harness connector at the HSM.
Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat
unoccupied, then with the seat occupied.
2. Test for 3.5 - 11.5 Ohms between control circuit terminal 3 and control circuit terminal 4.
瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat back heater
element.
瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat back
heater element.
3. Disconnect the X2, X4 harness connectors at the HSM.
4. Test for 850 - 300 kOhms between the signal circuit terminal 10 X4 and the low reference circuit terminal 7 X2.
瀚慖f less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat
back heater element/temperature sensor.
瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits
test normal, replace the seat back heater element/temperature sensor.
5. Connect the X1, X2, X4 harness connectors at the HSM.
6. Disconnect the harness connector at the seat back heater element/temperature sensor.
7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Driver or Passenger Seat Back Cushion Heater Replacement (Escalade with HP2) ()Driver or Passenger Seat Back Cushion Heater
Replacement (Tahoe with HP2) ()Driver or Passenger Seat Back Cushion Heater Replacement (without HP2) ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HSM replacement, setup, and programming
Dealer Installed
DTC B1935 or B2180 (Dealer Installed)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1935 04
- Left Seat Back Heater Circuit Open
DTC B1935 0A
- Left Seat Back Heater Circuit Rate of Change Below Threshold
DTC B1935 0B
- Left Seat Back Heater Circuit Current Above Threshold
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
B2180 0A, B2180 0B, B2180 0C, B2180 0D, B2180 0E, B2180 04, or B2180 1F
1. Ignition OFF, disconnect the X1 harness connector at the HSM.
Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat
unoccupied, then with the seat occupied.
2. Test for 3.5 - 11.5 Ohms between control circuit terminal 3 and control circuit terminal 4.
瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat back heater
element.
瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat back
heater element.
3. Disconnect the X2, X4 harness connectors at the HSM.
4. Test for 850 - 300 kOhms between the signal circuit terminal 10 X4 and the low reference circuit terminal 7 X2.
瀚慖f less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat
back heater element/temperature sensor.
瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits
test normal, replace the seat back heater element/temperature sensor.
5. Connect the X1, X2, X4 harness connectors at the HSM.
6. Disconnect the harness connector at the seat back heater element/temperature sensor.
7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the HSM.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the HSM.
8. If all circuits test normal, replace the HSM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Driver or Passenger Seat Back Cushion Heater Replacement (Escalade with HP2) ()Driver or Passenger Seat Back Cushion Heater
Replacement (Tahoe with HP2) ()Driver or Passenger Seat Back Cushion Heater Replacement (without HP2) ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HSM replacement, setup, and programming
Dealer Installed
DTC B1935 or B2180 (Dealer Installed)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1935 04
- Left Seat Back Heater Circuit Open
DTC B1935 0A
- Left Seat Back Heater Circuit Rate of Change Below Threshold
DTC B1935 0B
- Left Seat Back Heater Circuit Current Above Threshold
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瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the lumbar position sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Front Seat Adjuster Replacement (with HP2) ()Front Seat Adjuster Replacement (without HP2) ()
* Seat Lumbar Sub System Replacement ()
* Front Seat Recliner Actuator Motor Replacement ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for MSM replacement, setup, and programming
B1860
DTC B1825, B1850, B1860, B2355, B2365, or B2375
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1825 01
- Seat Recline Position Sensor Circuit Short to Battery
DTC B1825 06
- Seat Recline Position Sensor Circuit Short to Ground or Open
DTC B1825 5A
- Seat Recline Position Sensor Circuit Plausibility Failure
DTC B1850 01
- Left Seat Lumbar Horizontal Position Sensor Circuit Short to Battery
DTC B1850 06
- Left Seat Lumbar Horizontal Position Sensor Circuit Short to Ground or Open
DTC B1850 5A
- Left Seat Lumbar Horizontal Position Sensor Circuit Plausibility Failure
DTC B1860 01
- Left Seat Lumbar Vertical Position Sensor Circuit Short to Battery
DTC B1860 06
- Left Seat Lumbar Vertical Position Sensor Circuit Short to Ground or Open
DTC B1860 5A
- Left Seat Lumbar Vertical Position Sensor Circuit Plausibility Failure
DTC B2355 01
- Left Seat Front Vertical Position Sensor Circuit Short to Battery
DTC B2355 06
- Left Seat Front Vertical Position Sensor Circuit Short to Ground or Open
DTC B2355 5A
- Left Seat Front Vertical Position Sensor Circuit Plausibility Failure
DTC B2365 01
- Left Seat Rear Vertical Position Sensor Circuit Short to Battery
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the lumbar position sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Front Seat Adjuster Replacement (with HP2) ()Front Seat Adjuster Replacement (without HP2) ()
* Seat Lumbar Sub System Replacement ()
* Front Seat Recliner Actuator Motor Replacement ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for MSM replacement, setup, and programming
B1860
DTC B1825, B1850, B1860, B2355, B2365, or B2375
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1825 01
- Seat Recline Position Sensor Circuit Short to Battery
DTC B1825 06
- Seat Recline Position Sensor Circuit Short to Ground or Open
DTC B1825 5A
- Seat Recline Position Sensor Circuit Plausibility Failure
DTC B1850 01
- Left Seat Lumbar Horizontal Position Sensor Circuit Short to Battery
DTC B1850 06
- Left Seat Lumbar Horizontal Position Sensor Circuit Short to Ground or Open
DTC B1850 5A
- Left Seat Lumbar Horizontal Position Sensor Circuit Plausibility Failure
DTC B1860 01
- Left Seat Lumbar Vertical Position Sensor Circuit Short to Battery
DTC B1860 06
- Left Seat Lumbar Vertical Position Sensor Circuit Short to Ground or Open
DTC B1860 5A
- Left Seat Lumbar Vertical Position Sensor Circuit Plausibility Failure
DTC B2355 01
- Left Seat Front Vertical Position Sensor Circuit Short to Battery
DTC B2355 06
- Left Seat Front Vertical Position Sensor Circuit Short to Ground or Open
DTC B2355 5A
- Left Seat Front Vertical Position Sensor Circuit Plausibility Failure
DTC B2365 01
- Left Seat Rear Vertical Position Sensor Circuit Short to Battery
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瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the scan tool Driver Seat Recline Sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the MSM.
5. Install a 3A fused jumper wire between the signal circuit terminal 2 and the 5-volt reference circuit terminal 3. Verify the scan tool Driver
Seat Recline Sensor parameter is greater than 4.75 volts.
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the seat recline position sensor.
B2355 01, B2355 06, B2365 01, B2365 06, B2375 01 or B2375 06
1. Ignition OFF, disconnect the X2 harness connector at the seat adjuster assembly.
2. Test for less than 2 ohms between the low reference circuit terminal 2 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 6 and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the appropriate scan tool driver seat sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace
the MSM.
* Seat front vertical position sensor terminal 1
* Seat rear vertical position sensor terminal 5
* Seat horizontal position sensor terminal 3
5. Install a 3A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal 6. Verify the
appropriate scan tool driver seat position sensor parameter is greater than 4.75 volts.
* Seat horizontal position sensor terminal 3
* Seat front vertical position sensor terminal 1
* Seat rear vertical position sensor terminal 5
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the seat position sensor.
B1850 01, B1850 06, B1860 01 or B1860 06
1. Ignition OFF, disconnect the X2 harness connector at the lumbar adjuster assembly.
2. Test for less than 2 ohms between the low reference circuit terminal C and ground.
瀚慖f greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the appropriate scan tool lumbar sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace
the MSM.
* Lumbar vertical position sensor terminal B
* Lumbar horizontal position sensor terminal D
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the scan tool Driver Seat Recline Sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the MSM.
5. Install a 3A fused jumper wire between the signal circuit terminal 2 and the 5-volt reference circuit terminal 3. Verify the scan tool Driver
Seat Recline Sensor parameter is greater than 4.75 volts.
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the seat recline position sensor.
B2355 01, B2355 06, B2365 01, B2365 06, B2375 01 or B2375 06
1. Ignition OFF, disconnect the X2 harness connector at the seat adjuster assembly.
2. Test for less than 2 ohms between the low reference circuit terminal 2 and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 6 and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the appropriate scan tool driver seat sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace
the MSM.
* Seat front vertical position sensor terminal 1
* Seat rear vertical position sensor terminal 5
* Seat horizontal position sensor terminal 3
5. Install a 3A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal 6. Verify the
appropriate scan tool driver seat position sensor parameter is greater than 4.75 volts.
* Seat horizontal position sensor terminal 3
* Seat front vertical position sensor terminal 1
* Seat rear vertical position sensor terminal 5
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
MSM.
6. If all circuits test normal, test or replace the seat position sensor.
B1850 01, B1850 06, B1860 01 or B1860 06
1. Ignition OFF, disconnect the X2 harness connector at the lumbar adjuster assembly.
2. Test for less than 2 ohms between the low reference circuit terminal C and ground.
瀚慖f greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the MSM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
4. Verify the appropriate scan tool lumbar sensor parameter is less than 1 volt.
瀚慖f greater than the specified range, test the appropriate signal circuit listed below for a short to voltage. If the circuit tests normal, replace
the MSM.
* Lumbar vertical position sensor terminal B
* Lumbar horizontal position sensor terminal D
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瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the BCM.
6. If all circuits test normal, test or replace the headlamp and panel dimmer switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Headlamp Switch Replacement (Cadillac) (See: Lighting and Horns/Headlamp/Headlamp Switch/Service and Repair/Headlamp Switch
Replacement (Cadillac))Headlamp Switch Replacement (Except Cadillac) (See: Lighting and Horns/Headlamp/Headlamp Switch/Service
and Repair/Headlamp Switch Replacement (Except Cadillac))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming
Power Seats
DTC B1395
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1395 02
- Device Voltage Reference Output Circuit Short to Ground
DTC B1395 05
- Device Voltage Reference Output Circuit Short to Battery or Open
Diagnostic Fault Information
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the BCM.
6. If all circuits test normal, test or replace the headlamp and panel dimmer switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Headlamp Switch Replacement (Cadillac) (See: Lighting and Horns/Headlamp/Headlamp Switch/Service and Repair/Headlamp Switch
Replacement (Cadillac))Headlamp Switch Replacement (Except Cadillac) (See: Lighting and Horns/Headlamp/Headlamp Switch/Service
and Repair/Headlamp Switch Replacement (Except Cadillac))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming
Power Seats
DTC B1395
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1395 02
- Device Voltage Reference Output Circuit Short to Ground
DTC B1395 05
- Device Voltage Reference Output Circuit Short to Battery or Open
Diagnostic Fault Information
Thursday, November 21, 2019
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瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.
7. Disconnect the X2 harness connector at the amplifier.
8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 15
* Left rear low level audio signal (-) - terminal 14
* Right rear low level audio signal (+) - terminal 16
* Right rear low level audio signal (-) - terminal 8
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
9. If all circuits test normal, replace the amplifier.
DTC Set by Audio Amplifier UQA
1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.
2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:
* Left front speaker output (+) - terminal 4 X2
* Left front speaker output (-) - terminal 3 X2
* Right front speaker output (+) - terminal 2 X2
* Right front low speaker output (-) - terminal 1 X2
* Left rear speaker output (+) - terminal 8 X2
* Left rear speaker output (-) - terminal 7 X2
* Right rear speaker output (+) - terminal 6 X2
* Right rear speaker output (-) - terminal 5 X2
* Left or rear subwoofer speaker output (+) - terminal 7 X1
* Left or rear subwoofer speaker output (-) - terminal 3 X1
* Right subwoofer speaker output (+) - terminal 6 X1
* Right subwoofer speaker output (-) - terminal 2 X1
瀚慖f greater than the specified range, test both circuits of the affected speaker for a short to voltage.
3. Radio OFF, test for infinite resistance between the appropriate signal circuit terminal listed below and ground:
* Left front speaker output (+) - terminal 4 X2
* Left front speaker output (-) - terminal 3 X2
* Right front speaker output (+) - terminal 2 X2
* Right front low speaker output (-) - terminal 1 X2
* Left rear speaker output (+) - terminal 8 X2
* Left rear speaker output (-) - terminal 7 X2
* Right rear speaker output (+) - terminal 6 X2
* Right rear speaker output (-) - terminal 5 X2
* Left or rear subwoofer speaker output (+) - terminal 7 X1
* Left or rear subwoofer speaker output (-) - terminal 3 X1
* Right subwoofer speaker output (+) - terminal 6 X1
* Right subwoofer speaker output (-) - terminal 2 X1
瀚慖f less than the specified value, test both circuits of the affected speaker for a short to ground.
4. If all circuits test normal, reconnect all harness connectors at the amplifier.
5. Ignition ON, radio ON, disconnect the appropriate speaker.
6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.
瀚慖f less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.
瀚慖f greater then the specified range test the circuit for a short to voltage. If the circuit tests normal, replace the amplifier.
7. If the circuit tests normal, replace the appropriate speaker.
DTC Set by Audio Amplifier UQA with Y91 or UQS
1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.
2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.
7. Disconnect the X2 harness connector at the amplifier.
8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 15
* Left rear low level audio signal (-) - terminal 14
* Right rear low level audio signal (+) - terminal 16
* Right rear low level audio signal (-) - terminal 8
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
9. If all circuits test normal, replace the amplifier.
DTC Set by Audio Amplifier UQA
1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.
2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:
* Left front speaker output (+) - terminal 4 X2
* Left front speaker output (-) - terminal 3 X2
* Right front speaker output (+) - terminal 2 X2
* Right front low speaker output (-) - terminal 1 X2
* Left rear speaker output (+) - terminal 8 X2
* Left rear speaker output (-) - terminal 7 X2
* Right rear speaker output (+) - terminal 6 X2
* Right rear speaker output (-) - terminal 5 X2
* Left or rear subwoofer speaker output (+) - terminal 7 X1
* Left or rear subwoofer speaker output (-) - terminal 3 X1
* Right subwoofer speaker output (+) - terminal 6 X1
* Right subwoofer speaker output (-) - terminal 2 X1
瀚慖f greater than the specified range, test both circuits of the affected speaker for a short to voltage.
3. Radio OFF, test for infinite resistance between the appropriate signal circuit terminal listed below and ground:
* Left front speaker output (+) - terminal 4 X2
* Left front speaker output (-) - terminal 3 X2
* Right front speaker output (+) - terminal 2 X2
* Right front low speaker output (-) - terminal 1 X2
* Left rear speaker output (+) - terminal 8 X2
* Left rear speaker output (-) - terminal 7 X2
* Right rear speaker output (+) - terminal 6 X2
* Right rear speaker output (-) - terminal 5 X2
* Left or rear subwoofer speaker output (+) - terminal 7 X1
* Left or rear subwoofer speaker output (-) - terminal 3 X1
* Right subwoofer speaker output (+) - terminal 6 X1
* Right subwoofer speaker output (-) - terminal 2 X1
瀚慖f less than the specified value, test both circuits of the affected speaker for a short to ground.
4. If all circuits test normal, reconnect all harness connectors at the amplifier.
5. Ignition ON, radio ON, disconnect the appropriate speaker.
6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.
瀚慖f less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.
瀚慖f greater then the specified range test the circuit for a short to voltage. If the circuit tests normal, replace the amplifier.
7. If the circuit tests normal, replace the appropriate speaker.
DTC Set by Audio Amplifier UQA with Y91 or UQS
1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.
2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:
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瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.
7. Disconnect the X3 harness connector at the amplifier.
8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 13
* Left rear low level audio signal (-) - terminal 5
* Right rear low level audio signal (+) - terminal 12
* Right rear low level audio signal (-) - terminal 4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
9. If all circuits test normal, replace the amplifier.
DTC Set By Radio UQA with Y91 and U42 or UQS and U42
1. Ignition OFF, disconnect the X3 and X4 harness connectors at the amplifier.
2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left front low level audio signal (+) - terminal 11 X3
* Left front low level audio signal (-) - terminal 12 X3
* Right front low level audio signal (+) - terminal 3 X3
* Right front low level audio signal (-) - terminal 4 X3
* Left rear low level audio signal (+) - terminal 11 X4
* Left rear low level audio signal (-) - terminal 12 X4
* Right rear low level audio signal (+) - terminal 3 X4
* Right rear low level audio signal (-) - terminal 4 X4
* Subwoofer low level audio signal (+) - terminal 5 X4
* Subwoofer low level audio signal (-) - terminal 6 X4
* Center Channel low level audio signal (+) - terminal 13 X4
* Center Channel low level audio signal (-) - terminal 14 X4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the radio.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. If all circuits test normal, replace the amplifier.
DTC Set By Radio UQA with Y91 and U42 or UQS and U42
1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.
2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left front low level audio signal (+) - terminal 11 X3
* Left front low level audio signal (-) - terminal 12 X3
* Right front low level audio signal (+) - terminal 3 X3
* Right front low level audio signal (-) - terminal 4 X3
* Subwoofer low level audio signal (+) - terminal 5 X4
* Subwoofer low level audio signal (-) - terminal 6 X4
* Center Channel low level audio signal (+) - terminal 13 X4
* Center Channel low level audio signal (-) - terminal 14 X4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the radio.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. Ignition OFF, reconnect the X3 harness connector at the amplifier.
4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.
5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 1
* Left rear low level audio signal (-) - terminal 2
* Right rear low level audio signal (+) - terminal 3
* Right rear low level audio signal (-) - terminal 4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.
7. Disconnect the X3 harness connector at the amplifier.
8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 13
* Left rear low level audio signal (-) - terminal 5
* Right rear low level audio signal (+) - terminal 12
* Right rear low level audio signal (-) - terminal 4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
9. If all circuits test normal, replace the amplifier.
DTC Set By Radio UQA with Y91 and U42 or UQS and U42
1. Ignition OFF, disconnect the X3 and X4 harness connectors at the amplifier.
2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left front low level audio signal (+) - terminal 11 X3
* Left front low level audio signal (-) - terminal 12 X3
* Right front low level audio signal (+) - terminal 3 X3
* Right front low level audio signal (-) - terminal 4 X3
* Left rear low level audio signal (+) - terminal 11 X4
* Left rear low level audio signal (-) - terminal 12 X4
* Right rear low level audio signal (+) - terminal 3 X4
* Right rear low level audio signal (-) - terminal 4 X4
* Subwoofer low level audio signal (+) - terminal 5 X4
* Subwoofer low level audio signal (-) - terminal 6 X4
* Center Channel low level audio signal (+) - terminal 13 X4
* Center Channel low level audio signal (-) - terminal 14 X4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the radio.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. If all circuits test normal, replace the amplifier.
DTC Set By Radio UQA with Y91 and U42 or UQS and U42
1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.
2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left front low level audio signal (+) - terminal 11 X3
* Left front low level audio signal (-) - terminal 12 X3
* Right front low level audio signal (+) - terminal 3 X3
* Right front low level audio signal (-) - terminal 4 X3
* Subwoofer low level audio signal (+) - terminal 5 X4
* Subwoofer low level audio signal (-) - terminal 6 X4
* Center Channel low level audio signal (+) - terminal 13 X4
* Center Channel low level audio signal (-) - terminal 14 X4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the radio.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. Ignition OFF, reconnect the X3 harness connector at the amplifier.
4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.
5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 1
* Left rear low level audio signal (-) - terminal 2
* Right rear low level audio signal (+) - terminal 3
* Right rear low level audio signal (-) - terminal 4
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瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the radio.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. If all circuits test normal, replace the amplifier.
DTC Set By Radio UQA with Y91 and U42 or UQS and U42
1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.
2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left front low level audio signal (+) - terminal 11 X3
* Left front low level audio signal (-) - terminal 12 X3
* Right front low level audio signal (+) - terminal 3 X3
* Right front low level audio signal (-) - terminal 4 X3
* Subwoofer low level audio signal (+) - terminal 5 X4
* Subwoofer low level audio signal (-) - terminal 6 X4
* Center Channel low level audio signal (+) - terminal 13 X4
* Center Channel low level audio signal (-) - terminal 14 X4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the radio.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. Ignition OFF, reconnect the X3 harness connector at the amplifier.
4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.
5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 1
* Left rear low level audio signal (-) - terminal 2
* Right rear low level audio signal (+) - terminal 3
* Right rear low level audio signal (-) - terminal 4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.
7. Disconnect the X2 harness connector at the amplifier.
8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 15
* Left rear low level audio signal (-) - terminal 14
* Right rear low level audio signal (+) - terminal 16
* Right rear low level audio signal (-) - terminal 8
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
9. If all circuits test normal, replace the amplifier.
DTC Set by Audio Amplifier UQA
1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.
2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:
* Left front speaker output (+) - terminal 4 X2
* Left front speaker output (-) - terminal 3 X2
* Right front speaker output (+) - terminal 2 X2
* Right front low speaker output (-) - terminal 1 X2
* Left rear speaker output (+) - terminal 8 X2
* Left rear speaker output (-) - terminal 7 X2
* Right rear speaker output (+) - terminal 6 X2
* Right rear speaker output (-) - terminal 5 X2
* Left or rear subwoofer speaker output (+) - terminal 7 X1
* Left or rear subwoofer speaker output (-) - terminal 3 X1
* Right subwoofer speaker output (+) - terminal 6 X1
* Right subwoofer speaker output (-) - terminal 2 X1
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the radio.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. If all circuits test normal, replace the amplifier.
DTC Set By Radio UQA with Y91 and U42 or UQS and U42
1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.
2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left front low level audio signal (+) - terminal 11 X3
* Left front low level audio signal (-) - terminal 12 X3
* Right front low level audio signal (+) - terminal 3 X3
* Right front low level audio signal (-) - terminal 4 X3
* Subwoofer low level audio signal (+) - terminal 5 X4
* Subwoofer low level audio signal (-) - terminal 6 X4
* Center Channel low level audio signal (+) - terminal 13 X4
* Center Channel low level audio signal (-) - terminal 14 X4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the radio.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
3. Ignition OFF, reconnect the X3 harness connector at the amplifier.
4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.
5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 1
* Left rear low level audio signal (-) - terminal 2
* Right rear low level audio signal (+) - terminal 3
* Right rear low level audio signal (-) - terminal 4
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.
7. Disconnect the X2 harness connector at the amplifier.
8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.
* Left rear low level audio signal (+) - terminal 15
* Left rear low level audio signal (-) - terminal 14
* Right rear low level audio signal (+) - terminal 16
* Right rear low level audio signal (-) - terminal 8
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the rear seat audio (RSA) module.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)
module.
9. If all circuits test normal, replace the amplifier.
DTC Set by Audio Amplifier UQA
1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.
2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:
* Left front speaker output (+) - terminal 4 X2
* Left front speaker output (-) - terminal 3 X2
* Right front speaker output (+) - terminal 2 X2
* Right front low speaker output (-) - terminal 1 X2
* Left rear speaker output (+) - terminal 8 X2
* Left rear speaker output (-) - terminal 7 X2
* Right rear speaker output (+) - terminal 6 X2
* Right rear speaker output (-) - terminal 5 X2
* Left or rear subwoofer speaker output (+) - terminal 7 X1
* Left or rear subwoofer speaker output (-) - terminal 3 X1
* Right subwoofer speaker output (+) - terminal 6 X1
* Right subwoofer speaker output (-) - terminal 2 X1
Saturday, November 9, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 115
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 115
瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the SDM.
6. Install a 3 A fused jumper wire between the control circuit terminals listed below.
* Left roof rail airbag terminal 1 and 2
* Right roof rail airbag terminal 1 and 2
* Driver seat side airbag terminal 1 and 2
* Passenger seat side airbag terminal 1 and 2
* Driver seat belt retractor pretensioner terminal 1 and 2
* Passenger seat belt retractor pretensioner terminal 1 and 2
7. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.
瀚慖f greater than the specified range, test both control circuits terminals for an open/high resistance. If the circuits test normal, replace the
SDM.
8. If all circuits test normal, replace the roof rail air bag, seat side air bag, or seat belt pretensioner.
DTC B0019-B0020
1. Ignition OFF, disconnect the scan tool and disconnect harness connector X200.
2. Wait for 120 seconds and then test for greater than 25 ohm between the appropriate control circuit terminals listed below on the SDM side of
the connector:
* Passenger instrument panel airbag stage 1 terminal 5 and 6 X1
* Passenger instrument panel airbag stage 2 terminal 8 and 7 X1
瀚慖f less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting
bars are lifted. If the circuits and shorting bars tests normal, replace the SDM.
3. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground on the SDM side of the connector:
* Control circuit terminal 5 X1
* Control circuit terminal 6 X1
* Control circuit terminal 8 X1
* Control circuit terminal 7 X1
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the SDM.
4. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground on the SDM side of the connector:
* Control circuit terminal 5 X1
* Control circuit terminal 6 X1
* Control circuit terminal 7 X1
* Control circuit terminal 8 X1
瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the SDM.
5. Install a 3 A fused jumper wire between the control circuit terminals listed below.
* Passenger instrument panel airbag stage 1 terminal 5 and 6 X1
* Passenger instrument panel airbag stage 2 terminal 8 and 7 X1
6. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.
瀚慖f greater than the specified range, test both control circuits terminals for an open/high resistance. If the circuits test normal, replace the
SDM.
7. Disconnect the passenger instrument panel air bag harness connector.
8. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the air bag.
9. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:
* Control circuit terminal A1
* Control circuit terminal A2
* Control circuit terminal B1
* Control circuit terminal B2
瀚慖f greater than the specified range, test the control circuit for a short to voltage.
10. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:
瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the SDM.
6. Install a 3 A fused jumper wire between the control circuit terminals listed below.
* Left roof rail airbag terminal 1 and 2
* Right roof rail airbag terminal 1 and 2
* Driver seat side airbag terminal 1 and 2
* Passenger seat side airbag terminal 1 and 2
* Driver seat belt retractor pretensioner terminal 1 and 2
* Passenger seat belt retractor pretensioner terminal 1 and 2
7. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.
瀚慖f greater than the specified range, test both control circuits terminals for an open/high resistance. If the circuits test normal, replace the
SDM.
8. If all circuits test normal, replace the roof rail air bag, seat side air bag, or seat belt pretensioner.
DTC B0019-B0020
1. Ignition OFF, disconnect the scan tool and disconnect harness connector X200.
2. Wait for 120 seconds and then test for greater than 25 ohm between the appropriate control circuit terminals listed below on the SDM side of
the connector:
* Passenger instrument panel airbag stage 1 terminal 5 and 6 X1
* Passenger instrument panel airbag stage 2 terminal 8 and 7 X1
瀚慖f less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting
bars are lifted. If the circuits and shorting bars tests normal, replace the SDM.
3. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground on the SDM side of the connector:
* Control circuit terminal 5 X1
* Control circuit terminal 6 X1
* Control circuit terminal 8 X1
* Control circuit terminal 7 X1
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the SDM.
4. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground on the SDM side of the connector:
* Control circuit terminal 5 X1
* Control circuit terminal 6 X1
* Control circuit terminal 7 X1
* Control circuit terminal 8 X1
瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the SDM.
5. Install a 3 A fused jumper wire between the control circuit terminals listed below.
* Passenger instrument panel airbag stage 1 terminal 5 and 6 X1
* Passenger instrument panel airbag stage 2 terminal 8 and 7 X1
6. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.
瀚慖f greater than the specified range, test both control circuits terminals for an open/high resistance. If the circuits test normal, replace the
SDM.
7. Disconnect the passenger instrument panel air bag harness connector.
8. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the air bag.
9. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:
* Control circuit terminal A1
* Control circuit terminal A2
* Control circuit terminal B1
* Control circuit terminal B2
瀚慖f greater than the specified range, test the control circuit for a short to voltage.
10. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:
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