2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1132
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.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the harness connector at the current sensor.
3. Ignition OFF and scan tool disconnected for 30 seconds, test for less than 5 ohm between the low reference circuit terminal 2 and ground.
锟斤拷If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the drive
motor generator battery control module.
4. Connect the 12 V battery.
5. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.
锟斤拷If less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the drive
motor generator battery control module.
锟斤拷If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the drive motor generator
battery control module.
6. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the low reference circuit terminal 2. Verify the scan tool Calc.
Hybrid Batt. Current is greater than +225 A.
锟斤拷If less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the drive motor generator battery control module.
7. If all circuits test normal, replace the current sensor.
