P1AEE

DTC P1AEC or P1AEE

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 Control Module Hybrid/EV Battery System Voltage

DTC P1AEE

-
Drive Motor Control Module Hybrid/EV Battery System Voltage High Voltage

Circuit/System Description

The generator control module also called the starter generator control module is comprised of the following three control modules; the hybrid powertrain control module, 14 volt power module and the drive motor control module. These three control modules are non serviceable and are part of the generator control module.

The drive motor control module operates the starter generator based upon generator control module commands. The hybrid powertrain control module monitors the high voltage measurement and then will broadcast the high voltage measurement over serial data.

P1AEC

The drive motor control module compares the values in order to verify the hybrid battery high voltage measurement is accurate.

P1AEE

The hybrid powertrain control module monitors for high voltage that is greater than the system allows during normal operation.

Conditions for Running the DTC

P1AEC

DTC P1AE8 or P1AE9 is not set,

AND

High voltage is available and valid,

AND

Ignition is On,

AND

The high voltage contactor relays are closed.

P1AEE

Ignition voltage is greater than 7V.

Conditions for Setting the DTC

P1AEC

The difference between high voltage sensed and high voltage battery voltage measured is greater than 15V,

AND

The difference between high voltage sensed and the sum of the mid-pack voltages is greater than 10V.

P1AEE

The high voltage sensor voltage is greater than 150V,

OR

Hardware Overvoltage is detected.

Action Taken When the DTC Sets

* DTCs P1AEC and P1AEE are Type B DTCs.

* The hybrid powertrain control module opens the high voltage contactor relay.

Conditions for Clearing the DTC

DTCs P1AEC and P1AEE are Type B 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 DTC P1AEE. History DTC P1AEE may indicate that the high voltage contactor relays opened while large current flow was present.

Reference Information

Schematic Reference

Hybrid Energy Storage Schematics [1][2]Electrical Diagrams

Description and Operation

* Starter Generator Description and Operation Starter Generator Description and Operation

* Generator Control Module Description and Operation Generator Control Module Description and Operation

* Hybrid Modes of Operation Description Hybrid Modes of Operation Description

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 K59 starter generator control module. If the DTC resets, replace the K59 starter generator control module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Programming and Relearning for Generator Control Module, also called the Starter Generator Control Module, replacement, programming and setup.