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
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
The engine is running.
Conditions for Setting the DTC
P0A06
Eco-back signal (High) does not match to the LSD output signal for 320 ms.
P0A07
Eco-back signal (Low) does not match to the LSD output signal for 320 ms.
Action Taken When the DTC Sets
P0A06, P0A07
Set engine coolant pump validity to invalid.
Conditions for Clearing the DTC
P0A06
| • | LSD over current fault removed. |
| • | Clears 30 seconds after cycle wakeup signal. |
P0A07
| • | LSD wire open fault removed. |
| • | Normal range for 3.5 seconds. |
Diagnostic Aids
P0A06
Possible over current or wire short to power line fault.
P0A07
Possible wire open or short to ground fault.
Reference Information
Schematic Reference
Connector End View Reference
Hybrid Cooling Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Caution: 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 ON, command the SGCM coolant pump ON and OFF with a scan tool.
- Observe the operation of SGCM coolant pump.
Circuit/System Testing
P0A06
- Verify the DTC is set as current.
- Ignition OFF, disconnect the harness connector at the SGCM coolant pump.
- Ignition ON, verify that a test lamp illuminates between the control circuit terminal B and ground.
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the SGCM. |
P0A07
- Verify the DTC is set as current.
- Ignition OFF, disconnect the harness connector at the SGCM coolant pump.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal A and control circuit terminal B.
| ⇒ | If the test lamp is always ON, test the control circuit for a short to ground. 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 |
