2010 Cadillac Truck Escalade RWD V8-6.2L Page 1499
DTC P1AE5
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 P1AE5
- Battery Energy Control Module Hybrid Battery Power Off Control Circuit
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The drive motor generator battery control module is also referred to as the battery energy control module (BECM). The drive motor generator
battery control module will diagnose its own systems and determine when a fault condition is present. Diagnostics and system status is
communicated from the drive motor generator battery control module to the hybrid powertrain control module (HPCM) through serial data. The
hybrid powertrain control module is the host controller for diagnostic trouble code (DTC) information.
The drive motor generator battery control module receives a pulse width modulated (PWM) signal from the hybrid powertrain control module
called the contactor system request circuit command. The drive motor generator battery control module uses this signal to open and close the high
voltage contactors.
Conditions for Running the DTC
* The vehicle power mode is RUN.
* Ignition voltage is 9-18 V.
Conditions for Setting the DTC
Contactor system request circuit command signal is less than 25 percent
OR
Contactor system request circuit command signal is between 35 percent and 65 percent
OR
Contactor system request circuit command signal is greater than 75 percent
OR
The frequency of the contactor system request circuit command signal is not between 247 Hz to 253 Hz for 2 out of 3 seconds.
Action Taken When the DTC Sets
DTC P1AE5 is a Type C DTC.
Conditions for Clearing the DTC
