2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 693

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 693

瀚慖f not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

2. Measure actual inside air temperature using a thermometer. Compare this value to the scan tool Inside Air Temp. Sensor parameter and Aux.

Inside Air Temp. parameter. The measured temperature should be within 5 degrees of parameter.

瀚慖f not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

3. Measure actual temperature using a thermometer at each of the duct temperature sensors. Compare this value to the appropriate scan tool

Duct Actual parameter. The measured temperature should be within 5 degrees of appropriate Duct Actual parameter.

瀚慖f not within the specified range, refer to Duct Temperature Sensor Circuit Malfunction.

Circuit/System Testing

Ambient / Inside Air Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1 ohm between the low reference circuit terminal B 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 HVAC

control module.

3. Ignition ON, verify the appropriate scan tool Temp Sensor parameter is greater than 85掳C (185掳F).

瀚慖f less than the specified range, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the HVAC

control module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Temp

Sensor parameter is less than -35掳C (-39掳F).

瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Duct Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1.0 ohm 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 HVAC

control module.

3. Ignition ON, verify the appropriate Duct Temp Sensor Actual parameter is greater than 85掳C (185掳F).

瀚慖f less than the specified range, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the HVAC

control module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool Duct

Temp Sensor Actual parameter is less than -35掳C (-39掳F).

瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for the appropriate resistance between the signal terminal A or 1 and the low reference terminal B or 2. Refer to Sensor Resistance Table

for Sensor Resistance Table (See: Heating and Air Conditioning/Specifications/Electrical Specifications) resistance values.

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 Temperature Sensor Replacement - Upper Auxiliary (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Air Temperature Sensor Replacement - Upper Auxiliary)

* Duct Air Temperature Sensor Replacement - Upper Right Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 319

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 319

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 Temperature Sensor Replacement - Upper Auxiliary (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Air Temperature Sensor Replacement - Upper Auxiliary)

* Duct Air Temperature Sensor Replacement - Upper Right Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Duct Air Temperature Sensor Replacement - Upper Right Side)

* Duct Air Temperature Sensor Replacement - Upper Left Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Duct Air Temperature Sensor Replacement - Upper Left Side)

* Air Temperature Sensor Replacement - Lower Auxiliary (Delphi) (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Air Temperature Sensor Replacement - Lower Auxiliary (Delphi))

* Duct Air Temperature Sensor Replacement - Lower Left Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Duct Air Temperature Sensor Replacement - Lower Left Side)

* Duct Air Temperature Sensor Replacement - Lower Right Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Duct Air Temperature Sensor Replacement - Lower Right Side)

* Ambient Air Temperature Sensor Replacement (See: Heating and Air Conditioning/Ambient Temperature Sensor / Switch HVAC/Service

and Repair)

* Inside Air Temperature Sensor Replacement (See: Heating and Air Conditioning/Cabin Temperature Sensor / Switch/Service and Repair)

* Auxiliary Inside Air Temperature Sensor Assembly Replacement (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Auxiliary Inside Air Temperature Sensor Assembly Replacement)

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

programming

B0514

DTC B0158, B0163, B0168, B0173, B0178, B0509, B0514, B3578, or B3583

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 B0158 02

- Outside Air Temperature Sensor Circuit Short to Ground

DTC B0158 05

- Outside Air Temperature Sensor Circuit Short to Battery or Open

DTC B0163 02

- Passenger Compartment Temp Sensor 1 Circuit Short to Ground

DTC B0163 05

- Passenger Compartment Temp Sensor 1 Circuit Short to Battery or Open

DTC B0168 02

- Passenger Compartment Temp Sensor 2 Circuit Short to Ground

DTC B0168 05

- Passenger Compartment Temp Sensor 2 Circuit Short to Battery or Open

DTC B0173 02

- Output Air Temperature Sensor 1 Circuit Short to Ground

DTC B0173 05

- Output Air Temperature Sensor 1 Circuit Short to Battery or Open

DTC B0178 02

- Output Air Temperature Sensor 2 Circuit Short to Ground

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 279

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 279

瀚慖f not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

2. Measure actual inside air temperature using a thermometer. Compare this value to the scan tool Inside Air Temp. Sensor parameter and Aux.

Inside Air Temp. parameter. The measured temperature should be within 5 degrees of parameter.

瀚慖f not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

3. Measure actual temperature using a thermometer at each of the duct temperature sensors. Compare this value to the appropriate scan tool

Duct Actual parameter. The measured temperature should be within 5 degrees of appropriate Duct Actual parameter.

瀚慖f not within the specified range, refer to Duct Temperature Sensor Circuit Malfunction.

Circuit/System Testing

Ambient / Inside Air Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1 ohm between the low reference circuit terminal B 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 HVAC

control module.

3. Ignition ON, verify the appropriate scan tool Temp Sensor parameter is greater than 85掳C (185掳F).

瀚慖f less than the specified range, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the HVAC

control module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Temp

Sensor parameter is less than -35掳C (-39掳F).

瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Duct Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1.0 ohm 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 HVAC

control module.

3. Ignition ON, verify the appropriate Duct Temp Sensor Actual parameter is greater than 85掳C (185掳F).

瀚慖f less than the specified range, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the HVAC

control module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool Duct

Temp Sensor Actual parameter is less than -35掳C (-39掳F).

瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for the appropriate resistance between the signal terminal A or 1 and the low reference terminal B or 2. Refer to Sensor Resistance Table

for Sensor Resistance Table (See: Heating and Air Conditioning/Specifications/Electrical Specifications) resistance values.

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 Temperature Sensor Replacement - Upper Auxiliary (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Air Temperature Sensor Replacement - Upper Auxiliary)

* Duct Air Temperature Sensor Replacement - Upper Right Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 270

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 270

瀚慖f not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

2. Measure actual inside air temperature using a thermometer. Compare this value to the scan tool Inside Air Temp. Sensor parameter and Aux.

Inside Air Temp. parameter. The measured temperature should be within 5 degrees of parameter.

瀚慖f not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

3. Measure actual temperature using a thermometer at each of the duct temperature sensors. Compare this value to the appropriate scan tool

Duct Actual parameter. The measured temperature should be within 5 degrees of appropriate Duct Actual parameter.

瀚慖f not within the specified range, refer to Duct Temperature Sensor Circuit Malfunction.

Circuit/System Testing

Ambient / Inside Air Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1 ohm between the low reference circuit terminal B 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 HVAC

control module.

3. Ignition ON, verify the appropriate scan tool Temp Sensor parameter is greater than 85掳C (185掳F).

瀚慖f less than the specified range, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the HVAC

control module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Temp

Sensor parameter is less than -35掳C (-39掳F).

瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Duct Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1.0 ohm 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 HVAC

control module.

3. Ignition ON, verify the appropriate Duct Temp Sensor Actual parameter is greater than 85掳C (185掳F).

瀚慖f less than the specified range, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the HVAC

control module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool Duct

Temp Sensor Actual parameter is less than -35掳C (-39掳F).

瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for the appropriate resistance between the signal terminal A or 1 and the low reference terminal B or 2. Refer to Sensor Resistance Table

for Sensor Resistance Table (See: Heating and Air Conditioning/Specifications/Electrical Specifications) resistance values.

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 Temperature Sensor Replacement - Upper Auxiliary (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Air Temperature Sensor Replacement - Upper Auxiliary)

* Duct Air Temperature Sensor Replacement - Upper Right Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 261

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 261

瀚慖f not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

2. Measure actual inside air temperature using a thermometer. Compare this value to the scan tool Inside Air Temp. Sensor parameter and Aux.

Inside Air Temp. parameter. The measured temperature should be within 5 degrees of parameter.

瀚慖f not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

3. Measure actual temperature using a thermometer at each of the duct temperature sensors. Compare this value to the appropriate scan tool

Duct Actual parameter. The measured temperature should be within 5 degrees of appropriate Duct Actual parameter.

瀚慖f not within the specified range, refer to Duct Temperature Sensor Circuit Malfunction.

Circuit/System Testing

Ambient / Inside Air Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1 ohm between the low reference circuit terminal B 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 HVAC

control module.

3. Ignition ON, verify the appropriate scan tool Temp Sensor parameter is greater than 85掳C (185掳F).

瀚慖f less than the specified range, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the HVAC

control module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Temp

Sensor parameter is less than -35掳C (-39掳F).

瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Duct Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1.0 ohm 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 HVAC

control module.

3. Ignition ON, verify the appropriate Duct Temp Sensor Actual parameter is greater than 85掳C (185掳F).

瀚慖f less than the specified range, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the HVAC

control module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool Duct

Temp Sensor Actual parameter is less than -35掳C (-39掳F).

瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for the appropriate resistance between the signal terminal A or 1 and the low reference terminal B or 2. Refer to Sensor Resistance Table

for Sensor Resistance Table (See: Heating and Air Conditioning/Specifications/Electrical Specifications) resistance values.

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 Temperature Sensor Replacement - Upper Auxiliary (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

Switch/Service and Repair/Air Temperature Sensor Replacement - Upper Auxiliary)

* Duct Air Temperature Sensor Replacement - Upper Right Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 257

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 257

瀚慖f not within the specified range, perform the Circuit/System Testing.

2. Observe the scan tool Object Sensor Supply Voltage parameter while pressing and releasing the B71R liftgate object sensor - right. The

reading should change from Inactive to Active as the sensor is pressed and released.

瀚慖f the value does not change, test or replace the B71R liftgate object sensor - right.

3. Observe the scan tool Object Sensor Supply Voltage parameter while pressing and releasing the B71L liftgate object sensor - left. The

reading should change from Inactive to Active as the sensor is pressed and released.

瀚慖f the value does not change, test or replace the B71L liftgate object sensor - left.

4. Command the liftgate to power close by pressing the B70 liftgate close switch and as the liftgate is closing, press the B71R liftgate object

sensor - right or the B71L liftgate object sensor - left. The liftgate should stop and power open.

瀚慖f the liftgate continues to power close, replace the K39 liftgate module.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B71R liftgate object sensor - right.

2. Test for less than 10 ohm between the low reference circuit terminal B and ground.

瀚慖f greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests

normal, replace the K39 liftgate module.

3. Disconnect the harness connector at the B71L liftgate object sensor - left.

4. Ignition ON, test for 4.75-5.25 V between the signal circuit terminal A 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 K39 liftgate 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 K39 liftgate module.

5. Test of infinite resistance between the signal circuit terminal B and ground.

瀚慖f not the specified value, test the signal circuit for a short to ground.

6. Test for less than 10 ohm between the signal circuit terminal A at the B71R liftgate object sensor - right and the signal circuit terminal B at

the B71L liftgate object sensor - left.

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

7. If all circuits test normal, test or replace the appropriate B71 liftgate object sensor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate B71 liftgate object sensor.

2. Test for 8K-12K ohm between the signal terminal A and the low reference terminal B.

瀚慖f not within the specified range, replace the B71 liftgate object sensor.

Repair Instructions

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

* Liftgate Side Upper Sensor Replacement (Except Avalanche and EXT Escalade) (See: Body and Frame/Doors, Hood and Trunk/Trunk /

Liftgate/Trunk / Liftgate Position Sensor/Service and Repair)

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

programming

B0158

DTC B0158, B0163, B0168, B0173, B0178, B0509, B0514, B3578, or B3583

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.