2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1106
瀚慖f not within the specified range, replace the drive motor battery assembly.
14. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
15. 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 repair.
* Drive Motor Battery Negative High Voltage Contactor Relay Replacement ()
* Drive Motor Battery Positive High Voltage Contactor Relay Replacement ()
* Drive Motor Battery Positive and Negative Cable Replacement ()
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control
replacement, setup and programming
P0ABC
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.
The drive motor generator battery control module has several methods of monitoring the total voltage values of the hybrid batteries. The drive
motor generator battery control module monitors the calculated battery voltage and the terminal voltage. The calculated voltage represents the sum
of the voltages from the 20 individual battery measurements, and the terminal voltage represents the total DC bus voltage as measured on the output
side of the high voltage contactor. The drive motor generator battery control module compares these two voltage readings and looks for a
difference. The drive motor generator battery control module also monitors the terminal voltage for both over voltage and under voltage conditions.
Conditions for Running the DTC
