2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1134
* The drive motor generator battery control module detects less than 20 A on the high range sensor and the difference between the high range
current measurement and the medium range current measurement is greater than 20 A for 3 seconds.
* The drive motor generator battery control module detects less than 20 A on the high range sensor and the difference between the high range
current measurement and the low range current measurement is greater than 4 A for 3 seconds.
P0AC1
The drive motor generator battery control module detects that the current sensor high range is greater than +200 A and the current sensor medium
range is greater than +52 A and the current sensor low range is greater than +22 A for 3 seconds.
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
