P1AEC

DTC P1AEC-P1AEF

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptors
DTC P1AEC
- Drive Motor 1 Control Module Hybrid Battery System Voltage

DTC P1AED
- Drive Motor 2 Control Module Hybrid Battery System Voltage

DTC P1AEE
- Drive Motor 1 Control Module Hybrid Battery System Voltage High

DTC P1AEF
- Drive Motor 2 Control Module Hybrid Battery System Voltage High

Circuit/System Description

The drive motor generator power inverter control module contains two motor control modules. Each motor control modules measures hybrid battery high voltage with several internal sensors. The battery energy control module also monitors high voltage with several internal sensors. The battery energy control module high voltage measurement is broadcast over serial data.

P1AEC and P1AED

The motor control modules compare the values in order to verify the hybrid battery high voltage measurement is accurate.

P1AEE and P1AEF

The motor control modules monitors for high voltage that is greater than the system allows during normal operation.

Conditions for Running the DTC

* The high voltage contactor relays are closed.
* Ignition voltage is 8 V and no more than 18 V.

Conditions for Setting the DTC

P1AEC and P1AED

A difference of more than 30 V on the high voltage circuit is detected between the motor control module and the battery energy control module.

P1AEE and P1AEF

Greater than 475 V on the high voltage circuit is detected by the motor control module.

Action Taken When the DTC Sets

* DTCs P1AEC, P1AED, P1AEE and P1AEF are Type A DTCs.
* The drive motor power inverter module commands the battery energy control module to open the high voltage contactor relays.

Conditions for Clearing the DTC

DTCs P1AEC, P1AED, P1AEE and P1AEF are Type A DTCs.

Diagnostic Aids

Conditions such as loss of battery energy control module power or ground or removal of the high voltage manual disconnect while the vehicle was driving could create a voltage surge that may set these DTCs. History DTCs P1AEE and P1AEF may indicate that the high voltage contactor relays opened while large current flow was present.

Reference Information
DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)

Circuit/System Verification

1. Verify that DTCs P0ABB, P0ABC, or P0ABD is not set.

• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle).

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

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Control Module References) for Drive Motor Generator Power Inverter module replacement, setup, and programming