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Home › Pontiac › 2009 › G6 Base, 2D Coupe › Repair and Diagnosis › Transmission › Automatic Trans › Shift Interlock System › Diagnostic Information and Procedures › Transmission Control Lever Malfunction › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the automatic transmission shift lock actuator.
  2. Ignition OFF, test for less than 1 ohm between the ground circuit terminal G and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal E and ground.
  4. Ignition ON, command the Shift Lock Solenoid command to Lock and Unlock, with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If all circuits test normal, test or replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If all circuits test normal, test or replace the BCM.
  5. If all circuits test normal, test or replace the shift lock control solenoid.
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