2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1608
* The high voltage contactor relays are closed.
Conditions for Setting the DTC
P1AE8 and P1AEA
The motor control module (MCM) detects high voltage sensor voltage less than 0V.
P1AE9 and P1AEB
The motor control module (MCM) detects high voltage sensor voltage greater than 564V.
Action Taken When the DTC Sets
* DTCs P1AE8, P1AE9, P1AEA and P1AEB are Type B DTCs.
* The hybrid powertrain control module (HPCM) commands the battery energy control module (BECM) to open the high voltage contactor
relays.
Conditions for Clearing the DTC
DTCs P1AE8, P1AE9, P1AEA and P1AEB are Type B DTCs.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Circuit/System Verification
1. Clear the DTC information.
2. Ignition OFF for 1 minute.
3. Ignition ON.
4. Retest for DTCs P1AE8, P1AE9, P1AEA and P1AEB.
Circuit/System Testing
Ignition ON, retest for DTCs P1AE8, P1AE9, P1AEA and P1AEB.
If 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.
P1AE9
DTC P1AE8, P1AE9, P1AEA, or P1AEB
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 P1AE8
- Drive Motor 1 Control Module Hybrid Battery Voltage Sense Circuit Low Voltage
DTC P1AE9
- Drive Motor 1 Control Module Hybrid Battery Voltage Sense Circuit High Voltage
