2010 Cadillac Truck Escalade RWD V8-6.2L Page 1530
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Circuit/System Verification
Important: DTC P1AE7 must test and pass before performing this diagnostic procedure.
1. Inspect for DTC P1AE7.
瀚慖f the DTC has set, a loss of isolation condition within the hybrid battery has caused this DTC to set. Refer to DTC P1AE6 or P1AE7 (
See: P Code Charts/P1AE6).
2. Clear the DTC information.
3. Turn the ignition OFF for 1 minute.
4. Turn the ignition ON.
5. Retest for DTCs P1AF4, P1AF5, P1AF6 and P1AF7.
Circuit/System Testing
Important: DTC P1AE7 must test and pass before performing this diagnostic procedure.
1. Inspect for DTC P1AE7.
瀚慖f the DTC has set, a loss of isolation condition within the hybrid battery has caused this DTC to set. Refer to DTC P1AE6 or P1AE7 (
See: P Code Charts/P1AE6).
2. Ignition ON, retest for DTCs P1AF4, P1AF5, P1AF6 and P1AF7.
瀚慖f the DTC resets, program the PIM with the latest software version and recheck for DTCs. If the DTC resets after programming or if the
PIM already contains the latest software version, replace the PIM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.
P1AF7
DTC P1AF4-P1AF7
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 P1AF4
- Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage
DTC P1AF5
- Drive Motor 1 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage
DTC P1AF6
- Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit Low Voltage
DTC P1AF7
- Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage
Circuit/System Description
The drive motor generator power inverter control module (PIM) contains two motor control modules (MCMs). Each MCM measures hybrid battery
high voltage (HV) with several internal sensors. The MCMs test for loss of isolation (LOI) between either the HV positive circuit or HV negative
