Service Information

Volt

DTC P1AE8, P1AE9, P1AEA or P1AEB

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

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

DTC P1AEA: Drive Motor 2 Control Module Hybrid Battery Voltage Sense Circuit Low Voltage

DTC P1AEB: Drive Motor 2 Control Module Hybrid Battery Voltage Sense Circuit High Voltage

Circuit/System Description

The drive motor generator power inverter module contains two drive motor control modules. Each drive motor control module monitors its internal high voltage sensor for correct operation, no external circuits are involved. The modules listed below are part of the drive motor generator power inverter module and are not serviced separately.

•	Hybrid powertrain control module

•	Motor control module 1

•	Motor control module 2

Conditions for Running the DTC

•	Ignition is ON.

•	The system voltage is 8-18 V.

•	The high voltage contactor relays are closed.

Conditions for Setting the DTC

P1AE8 and P1AEA

The drive motor control module detects high-voltage sensor voltage below 0V.

P1AE9 and P1AEB

The drive motor control module detects high-voltage sensor voltage above 564 V. Cert Doc = 500 V.

Action Taken When the DTC Sets

•	DTCs P1AE8, P1AE9, P1AEA and P1AEB are Type B DTCs.

•	The hybrid powertrain control module commands the battery energy control module 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

Circuit/System Verification

If the DTC is set, program the T6 drive motor generator power inverter module. If the DTC resets, replace the T6 drive motor generator power inverter module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Drive Motor Generator Power Inverter Module replacement, set-up and programming.