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瀚慖f greater than the specified range, test the circuit for a short to voltage.

13. Ignition OFF, test for infinite resistance between the high circuit terminals listed below and ground.

* Driver steering wheel air bag coil connector Stage 1 terminal A X1

* Driver steering wheel air bag coil connector Stage 2 terminal A X2

瀚慖f less than the specified value, test the circuit for a short to ground.

14. Test for infinite resistance between the low circuit terminals listed below and ground.

* Driver steering wheel air bag coil connector Stage 1 terminal B X1

* Driver steering wheel air bag coil connector Stage 2 terminal B X2

瀚慖f less than the specified value, test the circuit for a short to ground.

15. Test for less then 1 ohm between the SDM connector and the air bag connector high circuit terminals listed below.

* Driver steering wheel air bag coil connector Stage 1 terminal A X1 and SDM terminal 4 X1.

* Driver steering wheel air bag coil connector Stage 2 terminal A X2 and SDM terminal 1 X1.

瀚慖f greater than the specified range, test the circuit for an open/high resistance.

16. Test for less then 1 ohm between the SDM connector and the air bag connector low circuit terminals listed below.

* Driver steering wheel air bag coil connector Stage 1 terminal B X1 and SDM terminal 3 X1

* Driver steering wheel air bag coil connector Stage 2 terminal B X2 and SDM terminal 2 X1

瀚慖f greater than the specified range, test the circuit for an open/high resistance.

17. If all circuits test normal, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Steering Wheel Inflatable Restraint Module Coil Replacement (See: Restraints and Safety Systems/Air Bag Systems/Clockspring Assembly

/ Spiral Cable/Service and Repair/Removal and Replacement)

* Steering Wheel Inflatable Restraint Module Replacement (See: Restraints and Safety Systems/Air Bag Systems/Air Bag/Service and

Repair/Removal and Replacement/Steering Wheel Inflatable Restraint Module Replacement)

* SIR/SRS Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Wiring Repairs/SIR/SRS Wiring Repairs)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for SDM replacement, setup, and programming

B0014

DTC B0014-B0045

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 B0014 01

- Driver Side Seat Air Bag Deployment Loop Short to Battery

DTC B0014 02

- Driver Side Seat Air Bag Deployment Loop Short to Ground

DTC B0014 04

- Driver Side Seat Air Bag Deployment Loop Open Circuit

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瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground.

* Terminal 1

* Terminal 25

瀚慖f the test lamp does not illuminate, test the appropriate circuit for a short to ground or an open/high resistance.

4. If all circuits test normal, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup, and programming

Brake Boost Solenoid

DTC C012F, C12A7, C12DC, or C12DD

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 C012F 00

- Brake Boost Solenoid Valve Circuit

DTC C012F 0E

- Brake Boost Solenoid Valve Circuit Shorted

DTC C12A7

- Brake Boost Solenoid Valve Circuit Performance

DTC C12DC

- Brake Boost Solenoid Valve Circuit Malfunction

DTC C12DD

- Brake Boost Solenoid Valve Circuit Shorted

Circuit/System Description

The electronic brake control module (EBCM) uses input from the boost pressure sensor for more accurate control during brake and vehicle stability

enhancement system (VSES) event. The boost pressure sensor is internal to the brake pressure modulator valve (BPMV).

Conditions for Running the DTC

* The ignition is ON.

* Ignition voltage is greater than 10 volts.

Conditions for Setting the DTC

C012F 00, C12A7, C12DC

Solonoid feedback current greater than 25% of commanded current.

C012F 0E, C12DD

Solonoid feedback current greater than 50% of requested current.

Action Taken When the DTC Sets

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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 HVAC

control module.

3. Ignition ON, test for 4.8-5.2 volts between the signal circuit terminal 1 and low reference circuit terminal 2.

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

HVAC control 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 HVAC control

module.

4. If all circuits test normal, test or replace the evaporator air temperature sensor.

Component Testing

1. Test the evaporator air temperature sensor by varying the sensor temperature while monitoring the sensor resistance.

2. Compare the readings with the Sensor Resistance Table (See: Heating and Air Conditioning/Specifications/Electrical Specifications) and

verify that the resistance is within 5 percent of the specification.

瀚慖f not within the specified range, replace the sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Air Conditioning Refrigerant Temperature Sensor Replacement (See: Heating and Air Conditioning/Refrigerant Temperature

Sensor/Service and Repair/HVAC - Automatic)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for HVAC control module replacement, setup, and

programming

B3935

DTC B3935

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 Descriptor

DTC B3935 57

- Transponder Authentication Error

Circuit/System Description

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is

energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value,

which is received by the theft deterrent module (TDM). The TDM then compares this value to a value stored in memory. This stored value is the

learned key code. If the value is correct, the TDM will send the prerelease password via the serial data circuit to the engine control module (ECM).

If the transponder value does not match the learned key code or a transponder value is not received, the TDM will send the start disable password to

the ECM.

Conditions for Running the DTC

* Ignition is in the Accessory or Run position.

* A valid transponder value has been read.

Conditions for Setting the DTC

* The transponder value is valid and matches the value stored in the TDM memory.

* The transponder calculation to the challenge from the TDM does not match the TDM calculation.

Action Taken When the DTC Sets

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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.

6. 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

B2180

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

DTC B1935 0C

- Left Seat Back Heater Circuit Current Below Threshold

DTC B1935 0D

- Left Seat Back Heater Circuit Resistance Above Threshold

DTC B1935 0E

- Left Seat Back Heater Circuit Resistance Below Threshold

DTC B1935 1F

- Left Seat Back Heater Circuit Intermittent

DTC B2180 04

- Right Seat Back Heater Circuit Open

DTC B2180 0A

- Right Seat Back Heater Circuit Rate of Change Below Threshold

DTC B2180 0B

- Right Seat Back Heater Circuit Current Above Threshold

DTC B2180 0C

- Right Seat Back Heater Circuit Current Below Threshold

DTC B2180 0D

- Right Seat Back Heater Circuit Resistance Above Threshold

DTC B2180 0E

- Right Seat Back Heater Circuit Resistance Below Threshold

DTC B2180 1F

- Right Seat Back Heater Circuit Intermittent

Diagnostic Fault Information

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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.

6. 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

HP2 W/O Memory

DTC B1935 or B2180 (HP2 w/o Memory)

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

DTC B1935 0C

- Left Seat Back Heater Circuit Current Below Threshold

DTC B1935 0D

- Left Seat Back Heater Circuit Resistance Above Threshold

DTC B1935 0E

- Left Seat Back Heater Circuit Resistance Below Threshold

DTC B1935 1F

- Left Seat Back Heater Circuit Intermittent

DTC B2180 04

- Right Seat Back Heater Circuit Open

DTC B2180 0A

- Right Seat Back Heater Circuit Rate of Change Below Threshold

DTC B2180 0B

- Right Seat Back Heater Circuit Current Above Threshold

DTC B2180 0C

- Right Seat Back Heater Circuit Current Below Threshold

DTC B2180 0D

- Right Seat Back Heater Circuit Resistance Above Threshold

DTC B2180 0E

- Right Seat Back Heater Circuit Resistance Below Threshold

DTC B2180 1F

- Right Seat Back Heater Circuit Intermittent

Diagnostic Fault Information

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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

5. Install a 3A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal A. Verify the

appropriate scan tool lumbar sensor parameter is greater than 4.75 volts.

* Lumbar vertical position sensor terminal B

* Lumbar horizontal position sensor terminal D

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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:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 5 X2

* Right front speaker output (+) - terminal 7 X2

* Right front speaker output (-) - terminal 6 X2

* Left rear speaker output (+) - terminal 15 X2

* Left rear speaker output (-) - terminal 14 X2

* Right rear speaker output (+) - terminal 16 X2

* Right rear speaker output (-) - terminal 8 X2

* Front center speaker output (+) - terminal 13 X2

* Front center speaker output (-) - terminal 12 X2

* Right rear midrange speaker output (+) - terminal 3 X2

* Right rear midrange speaker output (-) - terminal 2 X2

* Left rear midrange speaker output (+) - terminal 11 X2

* Left rear midrange speaker output (-) - terminal 10 X2

* Left or rear subwoofer speaker output (+) - terminal 1 X1

* Left or rear subwoofer speaker output (-) - terminal 2 X1

* Right subwoofer speaker output (+) - terminal 7 X1

* Right subwoofer speaker output (-) - terminal 3 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 5 X2

* Right front speaker output (+) - terminal 7 X2

* Right front speaker output (-) - terminal 6 X2

* Left rear speaker output (+) - terminal 15 X2

* Left rear speaker output (-) - terminal 14 X2

* Right rear speaker output (+) - terminal 16 X2

* Right rear speaker output (-) - terminal 8 X2

* Front center speaker output (+) - terminal 13 X2

* Front center speaker output (-) - terminal 12 X2

* Right rear midrange speaker output (+) - terminal 3 X2

* Right rear midrange speaker output (-) - terminal 2 X2

* Left rear midrange speaker output (+) - terminal 11 X2

* Left rear midrange speaker output (-) - terminal 10 X2

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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 U42

1. Ignition OFF, disconnect the X3 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 15

* Left front low level audio signal (-) - terminal 7

* Right front low level audio signal (+) - terminal 14

* Right front low level audio signal (-) - terminal 6

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.

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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 K36

SDM.

3. Ignition ON, test for 4-9 V between the signal circuit terminal 2 and ground.

瀚慖f less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K36 SDM.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K36 SDM.

4. If all circuits test normal, replace the B88 seat position sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Inflatable Restraint Seat Position Sensor Replacement (with HP2) (See: Restraints and Safety Systems/Air Bag Systems/Seat Position

Sensor/Service and Repair)Inflatable Restraint Seat Position Sensor Replacement (without HP2) (See: Restraints and Safety Systems/Air

Bag Systems/Seat Position Sensor/Service and Repair)

* SIR/SRS Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Wiring Repairs/SIR/SRS Wiring Repairs)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for SDM replacement, setup, and programming

Tahoe/Yukon Hybrid Minus Denali)

DTC B0081 (Tahoe/Yukon Hybrid Minus Denali)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using the 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 B0081 0F

- Passenger Presence System Erratic (sets in the SDM)

DTC B0081 3A

- Passenger Presence System Incorrect Component Installed (sets in the SDM)

DTC B0081 4B

- Passenger Presence System Calibration Not Learned (sets in the passenger presence (PPS) module)

DTC B0081 5A

- Passenger Presence System Plausibility Failure (sets in PPS module)

DTC B0081 39

- Passenger Presence System Internal Electronic Failure (sets in SDM)

DTC B0081 71

- Passenger Presence System Invalid Serial Data Received (sets in SDM)

Circuit/System Description

When the ignition is turned ON, the passenger presence system (PPS) and the inflatable restraint sensing and diagnostic module (SDM) performs

tests to diagnose critical malfunctions. When the SDM has completed the power-up mode, the SDM will establish communication with the PPS

module. The SDM will also request the instrument panel cluster (IPC) to illuminate both of the PASSENGER AIR BAG ON/OFF indicators ON

for 5 seconds. If the SDM determines the correct PPS is installed and functioning normally, the SDM will illuminate the passenger air bags ON or

OFF indicator based on messages from the PPS. The SDM sends a message to the IPC to illuminate the appropriate PASSENGER AIR BAG

ON/OFF indicator.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

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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.

5. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:

* Roof rail air bag control circuit terminal 1

* Roof rail air bag control circuit terminal 2

* Seat side air bag control circuit terminal 1

* Seat side air bag control circuit terminal 2

* Retractor pretensioner control circuit terminal 1

* Retractor pretensioner control circuit terminal 2

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.