LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2009 >> HHR LS, Standard >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC P0622 >> Circuit/System Testing

Circuit/System Testing

  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 parameter is less than 5%.
    • If greater than the specified range, test the appropriate signal circuit terminal listed below for a short to voltage. If the circuit tests normal, replace the ECM.
      • Terminal 2 X1 (LE8/LE9)
      • Terminal C X1 (LNF)
  4. Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and B+. Verify the scan tool ECM GEN-F Terminal Signal parameter is greater than 95%.
    • Terminal 2 X1 (LE8/LE9)
    • Terminal C X1 (LNF)
    • If less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  5. If all circuits test normal, test or replace the generator.
scientia non olet · About LEMON Manuals