2010 Cadillac Truck Escalade RWD V8-6.2L Page 1551
P0AC2
The drive motor generator battery control module detects that the current sensor high range is less than -200 A and the current sensor medium range
is less than -52 A and the current sensor low range is greater than -22 A for 3 seconds.
P1A07
The drive motor generator battery control module detects less than 4.8 V or greater than 5.2 V on the 5 V reference circuit.
Action Taken When the DTC Sets
* DTC P0AC0, P0AC1, P0AC2, and P1A07 are type A DTCs.
* The driver information center (DIC) displays the SERVICE HYBRID SYSTEM message.
* State of charge goes to invalid.
* The drive motor generator battery control module sends a message to the hybrid powertrain control module requesting that the hybrid battery
power limit be set to 3 kilowatts, resulting in minimal hybrid function.
Conditions for Clearing the DTC
DTC P0AC0, P0AC1, P0AC2, and P1A07 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)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Special Tools
EL-48900 HEV Safety Kit
Circuit/System Verification
Ignition ON, observe the scan tool Calc. Hybrid Batt. Current parameter. The reading should be between -200 and +200 A, and change with the
amount of current draw on the drive motor generator battery.
Circuit/System Testing
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
