P1AE9

DTC P1AE8 or P1AE9

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 Descriptor

DTC P1AE8

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Drive Motor Control Module Hybrid/EV Battery Voltage Sense Circuit Low Voltage

DTC P1AE9

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Drive Motor Control Module Hybrid/EV Battery Voltage Sense Circuit 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 is able to detect out of range low or out of range high conditions on the high voltage sensor circuit.

Conditions for Running the DTC

* The Ignition is ON.

* The high voltage contactor relay is closed.

Conditions for Setting the DTC

P1AE8

With the hybrid/EV battery system contactor closed, the starter generator control module detects high voltage sensor voltage less than 30V.

P1AE9

The drive motor control module detects high voltage sensor voltage greater than 190V.

Action Taken When the DTC Sets

* DTCs P1AE8 and P1AE9 are Type B DTCs.

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

* The battery indicator light will illuminate.

Conditions for Clearing the DTC

DTCs P1AE8 and P1AE9 are Type B DTCs.

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

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.