P0A07

DTC P0A06 or P0A07

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 P0A06
- Starter/Generator Control Module Coolant Pump Control Circuit High Voltage

DTC P0A07
- Starter/Generator Control Module Coolant Pump Control Circuit Low Voltage

Diagnostic Fault Information





Circuit/System Description

The starter/generator control module (SGCM) monitors the SGCM coolant pump control circuit for an open wire or a over current condition.

Conditions for Running the DTC

Engine ON.

Conditions for Setting the DTC

P0A06

The SGCM detects a short to voltage in the SGCM coolant pump control circuit for 320 ms or greater.

P0A07

The SGCM detects a short to ground or an open/high resistance in the SGCM coolant pump control circuit for 320 ms or greater.

Action Taken When the DTC Sets

* Hybrid system disabled.
* Check Engine indicator is commanded ON.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* The ignition must be cycled before the DTC can be cleared.

Reference Information
Schematic Reference

Hybrid Cooling Schematics (Hybrid Cooling Schematics)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

Starter/Generator Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Testing

Warning

To help avoid personal injury, be careful when working in the vicinity of the battery energy control module. Internal components will still be live, 36V potential, even when the cover has been opened or removed.

1. Ignition OFF, disconnect the harness connector at the SGCM coolant pump.
2. Ignition ON, test for B+ between the B+ circuit terminal A and ground.

• If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance.

3. Ignition OFF, disconnect the X1 harness connector at the SGCM.
4. Ignition ON, test for 12V between the control circuit terminal B and ground.

• If voltage is present, test the control circuit for a short to voltage.

5. Test for infinite resistance between the control circuit terminal B and ground.

• If not the specified value, test the control circuit for a short to ground.

6. If all circuits test normal, test or replace the SGCM.

Component Testing

Coolant Pump
1. Ignition OFF, disconnect the harness connector at the coolant pump.
2. Test for 3M-9M ohm between the coolant pump terminal A and terminal B.

• If not within the specified range, replace the coolant pump.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Generator Control Module Coolant Pump Replacement (Generator Control Module Coolant Pump Replacement)
* Control Module References (Programming and Relearning) for SGCM replacement, setup, and programming