P0CA2

DTC P0CA2

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 P0CA2
- 14 V Power Module Step Down Voltage Performance

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 14V power module has MOSFET switching transistors that allows it to converts Hybrid Battery voltage to 12 volts. This diagnostic is designed to test for an electrical short in the MOSFET transistors. The MOSFET transistors are internal to the 14V power module and cannot be serviced separately from the generator control module.

Conditions for Running the DTC

The ignition is ON and the 14V Power Module is enabled.

Conditions for Setting the DTC

The 14 V Power Module has detected a transistor failure for 25 mS.

Action Taken When the DTC Sets

* The 14V power module stops supplying power to the 12V system.
* The charge indicator will illuminate.
* DTC P0CA2 is a Type A DTC.

Conditions for Clearing the DTC

* DTC P0CA2 is a Type A DTC.
* 14 V Power Module detects no transistor failures for 5 seconds.

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, then 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.