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Home >> Pontiac >> 2008 >> G6 Base, 3.5 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1415 (Shift Interlock System) >> Diagnostic Information and Procedures >> Transmission Control Lever Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 Pontiac G6. However, it is still accessible from the selected car via links, so may be relevant.
  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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