2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1104
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
* The ignition is ON.
* The 12 V battery voltage is 9-18 V.
* The high voltage contactors are closed.
Conditions for Setting the DTC
P0ABB
The drive motor generator battery control module detects a 50 V difference between the hybrid battery pack calculated voltage and the hybrid
battery terminal voltage for 7 seconds.
P0ABC
The drive motor generator battery control module detects the terminal voltage is less than 50 V for 3 seconds.
P0ABD
The drive motor generator battery control module detects the terminal voltage is greater than 430 V for 3 seconds.
Action Taken When the DTC Sets
* DTCs P0ABB, P0ABC, and P0ABD are type A DTCs.
* The battery vent fan is commanded to high speed.
Conditions for Clearing the DTC
DTCs P0ABB, P0ABC, and P0ABD are type A DTCs.
Reference Information
Schematic Reference
Hybrid Energy Storage Schematics ()
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Drive Motor Battery System Description ()
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Special Tools
* EL-48571 High Voltage Battery Pin Out Box
* EL-48900 HEV Safety Kit
