2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1152

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1152

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 P0A9C

- Hybrid Battery 1 Temperature Sensor Performance

DTC P0A9D

- Hybrid Battery 1 Temperature Sensor Circuit Low Voltage

DTC P0A9E

- Hybrid Battery 1 Temperature Sensor Circuit High Voltage

DTC P0AC6

- Hybrid Battery 2 Temperature Sensor Performance

DTC P0AC7

- Hybrid Battery 2 Temperature Sensor Circuit Low Voltage

DTC P0AC8

- Hybrid Battery 2 Temperature Sensor Circuit High Voltage

DTC P0ACB

- Hybrid Battery 3 Temperature Sensor Performance

DTC P0ACC

- Hybrid Battery 3 Temperature Sensor Circuit Low Voltage

DTC P0ACD

- Hybrid Battery 3 Temperature Sensor Circuit High Voltage

DTC P0AE9

- Hybrid Battery 4 Temperature Sensor Performance

DTC P0AEA

- Hybrid Battery 4 Temperature Sensor Circuit Low Voltage

DTC P0AEB

- Hybrid Battery 4 Temperature Sensor Circuit High Voltage

Typical Scan Tool Data

Circuit/System Description

The drive motor generator battery has four hybrid battery temperature sensors. The hybrid battery temperature sensors are located on the top of the

hybrid batteries. The temperature sensor is a variable resistor that measures the temperature of the hybrid batteries. The control module supplies 5 V

to the signal circuit and a ground for the low reference circuit. The hybrid battery temperature sensor resistance changes with battery temperature.

The lower the temperature, the higher the resistance of the sensor. The higher the temperature, the lower the resistance of the sensor. The drive

motor generator battery control module (BECM) uses the battery temperature sensors to determine the hybrid battery temperature to control the

battery cooling fan operation.

Conditions for Running the DTC