2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 276
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 /
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
B0178
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
