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DTC P1AEC-P1AEF

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 Descriptors

DTC P1AEC: Drive Motor 1 Control Module Hybrid/EV Battery System Voltage

DTC P1AED: Drive Motor 2 Control Module Hybrid/EV Battery System Voltage

DTC P1AEE: Drive Motor 1 Control Module Hybrid/EV Battery System Voltage High

DTC P1AEF: Drive Motor 2 Control Module Hybrid/EV Battery System Voltage High

Circuit/System Description

The power inverter module, also called the drive motor generator power inverter module, contains two motor control modules. Each motor control modules measures hybrid battery high voltage with several internal sensors. The hybrid powertrain control module 2 also monitors high voltage with several internal sensors. The hybrid powertrain control module 2 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 hybrid/EV battery system contactor relays are closed.
    • Ignition voltage is 8 V and no more than 18 V.

P1AEC

DTCs P1AE8 or P1AE9 are not set.

P1AED

DTCs P1AEA or P1AEB are not set.

Conditions for Setting the DTC

P1AEC and P1AED

A difference of more than 40 V on the high-voltage circuit is detected between the hybrid powertrain control module and the hybrid powertrain control module 2.

AND

A difference of more than 50 V on the high-voltage circuit is detected between the motor control module and the hybrid powertrain control module 2.

P1AEE and P1AEF

More than 425 V on the high-voltage circuit is detected by the motor control module.

Action Taken When the DTC Sets
    • DTCs P1AEC and P1AED are Type B DTCs.
    • DTCs P1AEE and P1AEF are Type A DTCs.
    • The power inverter module requests the hybrid powertrain control module 2 to open the high voltage contactor relays.

Conditions for Clearing the DTC
    • DTCs P1AEC and P1AED are Type B DTCs.
    • DTCs P1AEE and P1AEF are Type A DTCs.

Diagnostic Aids

Conditions such as loss of battery energy control module power or earth or removal of the high-voltage manual disconnect while the vehicle was being driven could create a voltage surge that may set DTCs P1AEE and P1AEF. 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

Circuit/System Verification
  1. Verify that DTCs P0ABB, P0ABC or P0ABD are not set.
    2. ⇒If any of the DTCs are set, refer to 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 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, also called the power inverter module, replacement, programming and set-up.

   


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