2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1251

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1251

- Visually and functionally inspect the gloves before use.

- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or

not.

Failure to follow the procedures exactly as written may result in serious injury or death.

Fan Relay Test

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

2. Ignition OFF, disconnect the drive motor generator battery vent fan relay.

3. Test for 85-110 ohm between terminals 1 and 2.

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

4. Test for infinite resistance between the following terminals:

* 1 and 3

* 1 and 4

* 2 and 3

* 2 and 4

* 3 and 4

瀚慖f not the specified value, replace the relay.

5. Install a 5 A fused jumper wire between relay terminal 2 and 12 V. Install a jumper wire between relay terminal 1 and ground. Test for less

than 2 ohm between terminals 3 and 4.

瀚慖f greater than the specified range, replace the relay.

Repair Instructions

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

* Drive Motor Battery Control Module Harness Replacement ()

* Generator Battery Vent Fan Replacement ()

* Generator Battery Vent Fan Relay Replacement ()

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

replacement, setup, and programming

P0A95

DTC P0A95

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 P0A95

- High Voltage Fuse

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