Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC P0A06: Starter/Generator Control Module Coolant Pump Control Circuit High VoltageDTC P0A07: Starter/Generator Control Module Coolant Pump Control Circuit Low Voltage
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Starter/Generator Control module (SGCM) Coolant Pump B+ | P0A7C | P0A7C | -- | -- |
Starter/Generator Control module (SGCM) Coolant Pump Control | P0A07 | P0A07 | P0A06 | -- |
Circuit/System Description
The starter/generator control module (SGCM) monitors the SGCM coolant pump control circuit for an open circuit 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. |
| • | malfunction indicator lamp (MIL) 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
Connector End View Reference
Description and Operation
Starter Generator Control Module Cooling System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
Warning: To help avoid personal injury, be careful when working in the vicinity of the generator battery disconnect control module. Internal components will still be live, 36V potential, even when the cover has been opened or removed.
- Ignition OFF, disconnect the harness connector at the SGCM coolant pump.
- Ignition ON, test for B+ between the B+ circuit terminal A and ground.
- Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal B and ground.
- Ignition OFF, verify that a test lamp does not illuminates between B+ and the control circuit terminal B.
- Ignition OFF, connect a test lamp between the B+ circuit terminal A and the control circuit terminal B.
- Clear the DTC with a scan tool.
- Command the SGCM Coolant Pump Relay ON and OFF with a scan tool. The test lamp should turn On and OFF when commanded.
- If all circuits test normal, test or replace the SGCM coolant pump.
| ⇒ | If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the SGCM. |
| ⇒ | If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the SGCM. |
| ⇒ | If the test lamp does not turn ON and OFF when commanded, test the control circuit for an open/high resistance. If the circuit tests normal, replace the SGCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for SGCM replacement, setup, and programming |
