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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1668 (Hybrid Cooling System - 2.4L (Hp7)) >> Diagnostic Information and Procedures >> DTC P0A06 or P0A07 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
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.
  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 ON, verify that a test lamp does not illuminate between the control circuit terminal B and ground.
    • If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the SGCM.
  4. Ignition OFF, verify that a test lamp does not illuminates between B+ and the control circuit terminal B.
    • If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the SGCM.
  5. Ignition OFF, connect a test lamp between the B+ circuit terminal A and the control circuit terminal B.
  6. Clear the DTC with a scan tool.
  7. Command the SGCM Coolant Pump Relay ON and OFF with a scan tool. The test lamp should turn On and OFF when commanded.
    • 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.
  8. If all circuits test normal, test or replace the SGCM coolant pump.
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