2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1103

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1103

1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().

2. Verify that none of the following conditions exist:

* the inlet and outlet air vents do not have any obstructions or blockages

* the vent fan blades are not broken or damaged

* the internal foam seals are not missing or damaged

瀚慖f any conditions are found, remove, repair or replace as necessary.

3. Ignition OFF, disconnect the X3 harness connector at the drive motor generator battery control module.

4. Test for 1k ohm-209k ohm between each of the terminals listed below. The resistance of each temperature sensor should be within the

specified range, and within 500 ohm of each other. Refer to Temperature Versus Resistance ().

* Sensor 1-5 V reference circuit terminal 9 and low reference circuit terminal 10

* Sensor 2-5 V reference circuit terminal 11 and low reference circuit terminal 12

瀚慖f not within the specified range, replace the drive motor battery sensor module wiring harness.

5. If all circuits test normal, replace the drive motor generator battery control module.

Repair Instructions

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

* Drive Motor Battery Sensor Module Wiring Harness Replacement ()

* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module

replacement, setup and programming

P0ABB

DTC P0ABB, P0ABC, or P0ABD

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 P0ABB

- Hybrid Battery Voltage Sensor Performance

DTC P0ABC

- Hybrid Battery Voltage Sensor Circuit Low Voltage

DTC P0ABD

- Hybrid Battery Voltage Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The system contains twenty battery modules. Each module contains two 7.2 V cells for a total nominal system voltage of 288 V. Each battery

module is rated at 14.4 V direct current (DC) and all the modules are connected together in series. The drive motor generator battery is also referred

to as the hybrid battery.