P0A8D

DTC P0A8D or P0A8E

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 P0A8D
- 14 V Power Module System Voltage Low Voltage

DTC P0A8E
- 14 V Power Module System Voltage High Voltage

Circuit/System Description

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

The drive motor control module is comprised of the following control modules; hybrid powertrain control module, 14 volt power module and the motor control module.

The 14V power module has a voltage sensor that constantly monitors system output voltage. This diagnostic is intended to check the output voltage sensor's signal voltage, not the 12V system voltage. This sensor is internal to the 14V power module and is not serviced separately from the generator control module.

Conditions for Running the DTC

* The ignition is ON.
* 14V Power Module Status parameter is Normal.
* Ignition voltage is between 9-16V.

Conditions for Setting the DTC

P0A8D

14V Power Module output voltage sensor value is less than 1 volt for greater than 2 seconds.

P0A8E

14V Power Module output voltage sensor value is greater than 20 volts for greater than 2 seconds.

Action Taken When the DTC Sets

DTCs P0A8D and P0A8E are Type B DTCs.

P0A8E

The charge indicator will illuminate.

Conditions for Clearing the DTC

DTCs P0A8D and P0A8E are Type B DTCs.

P0A8D

14V Power Module output voltage sensor value is greater than 1.5 volts.

P0A8E

14V Power Module output voltage sensor value is less than 19.5 volts.

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 DTCs are set, replace the K59 starter generator control module.

Repair Instructions

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

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