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Home >> Chevrolet >> 2011 >> Aveo LS, 4D Hatchback, Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Shift Lock Control System >> Diagnostic Information and Procedures >> Transmission Control Lever Malfunction (with WHB) >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the automatic transmission shift lock actuator.
  2. Test for less than 1 ohm between the ground circuit terminal 2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Test for less than 1 ohm between the ground circuit terminal 3 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Ignition ON, connect a test lamp between the control circuit terminal 4 and ground.
  5. Observe the test light while applying and releasing the brake pedal. The test lamp should turn ON and OFF when applying and releasing the brake pedal.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the IPC.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the IPC.
  6. Ignition OFF, connect the harness connector at the automatic transmission shift lock actuator. Disconnect the X1 harness connector at the I/P fuse block.
  7. Place the transmission lever in the park position.
  8. Test for less than 1Ω between the signal circuit terminal 32 and ground.
    • If greater than the specified range, test the signal circuit for an open/high resistance.
  9. If all circuits test normal, test or replace the shift lock actuator.
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