2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1192
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 engine
control module.
3. Ignition ON, verify the scan tool DMCM Coolant Temperature parameter is greater than 162掳C (323.6掳F).
瀚慖f less than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the engine
control module.
4. Install a 3 A fused jumper wire between the signal circuit terminal B and ground. Verify the scan tool DMCM Coolant Temperature
parameter is less than -60.5掳C (-76.9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 engine control module.
5. If all circuits test normal, test or replace the generator control module temperature sensor.
Component Testing
Temperature Sensor Test
Note: A thermometer can be used to test the sensor off vehicle in heated water.
1. Test the generator control module coolant temperature sensor by varying the sensor temperature while monitoring the sensor resistance.
2. Compare the readings with the Temperature Versus Resistance ().
瀚慖f not within the specified range, replace the generator control module coolant temperature sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Coolant Temperature Sensor Replacement (Generator Control Module) ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and
programming
P0A2B
DTC P0A2B-P0A2D or P0A31-P0A33
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 P0A2B
- Drive Motor 1 Temperature Sensor Performance
DTC P0A2C
- Drive Motor 1 Temperature Sensor Circuit Low Voltage
DTC P0A2D
- Drive Motor 1 Temperature Sensor Circuit High Voltage
DTC P0A31
- Drive Motor 2 Temperature Sensor Performance
DTC P0A32
- Drive Motor 2 Temperature Sensor Circuit Low Voltage
DTC P0A33
- Drive Motor 2 Temperature Sensor Circuit High Voltage
