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Home >> Chevrolet >> 2009 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> DTC P0626 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Saturn Outlook, 2010 GMC Acadia, 2010 Chevrolet Traverse, and 2010 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify that a test lamp illuminates between the generator output B+ circuit terminal B X2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  2. Ignition OFF, disconnect the harness connector X1 at the generator.
  3. Ignition ON, verify the scan tool ECM GEN-F Terminal Signal parameter displays less than 5 percent.
    • If greater than the specified range, test the signal circuit terminal 2 X1 for a short to voltage. If the circuit tests normal, replace the ECM.
  4. Install a 3A fused jumper wire between B+ and the signal circuit.
  5. Verify the scan tool ECM GEN-F Terminal Signal parameter displays greater than 95 percent.
    • If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  6. If the circuit tests normal replace the generator.
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