2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1566
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
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. Verify that none of the following conditions exist:
* The inlet and outlet air vents do not have any obstructions or blockages.
* The vent fan blades are not broken or damaged.
* The internal foam seals are not missing or damaged.
锟斤拷If any conditions are found, remove, repair or replace as necessary.
3. Ignition OFF, disconnect the X3 harness connector at the drive motor generator battery control module.
Note: The following test must be performed when the battery pack has equalized at room temperature. An increase or decrease in
temperature will cause resistance to change and may result in invalid test results.
4. Test for 1k ohm-209k ohm between the terminals listed below. The resistance of each temperature sensor should be within the specified
range, and within 500 ohm of each other. Refer to Temperature Versus Resistance ().
* Sensor 1-5 V reference circuit terminal 1 and low reference circuit terminal 2
* Sensor 2-5 V Reference circuit terminal 3 and low reference circuit terminal 4
* Sensor 3-5 V Reference circuit terminal 5 and low reference circuit terminal 6
* Sensor 4-5 V Reference circuit terminal 7 and low reference circuit terminal 8
锟斤拷If not within the specified range, replace the drive motor battery sensor module wiring harness.
5. 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 Sensor Module Wiring Harness Replacement ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P1AC6
DTC P1AC6 or P1AC7
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 Descriptor
DTC P1AC6
- Drive Motor 1 Control Module Crankshaft Position (CKP) Sensor Circuit
DTC P1AC7
- Drive Motor 1 Control Module Crankshaft Position Sensor Performance
Diagnostic Fault Information
