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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 P0622 >> 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 B+ circuit ring terminal 1 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 X1 harness connector at the generator.
  3. Ignition ON, verify the scan tool ECM GEN-F Terminal Signal is less than 5%.
    • 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 3 A fused jumper wire between the signal circuit terminal 2 X1 and B+. Verify the scan tool ECM GEN-F Terminal Signal is greater than 95%.
    • If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  5. If all circuits test normal, test or replace the generator.
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