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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector X1 at the PSCM.
  2. Ignition OFF, test for less than 1.0 Ω of resistance between the control circuit terminal 2 and the control circuit terminal 3.
    • If greater than the specified range, test the control circuits for an open/high resistance. If circuits test normal, replace the power steering motor.
  3. Ignition OFF, test for less than 1.0 Ω of resistance between the control circuit terminal 3 and the control circuit terminal 1.
    • If greater than the specified range, test the control circuits for an open/high resistance. If circuits test normal, replace the power steering motor.
  4. Ignition OFF, test for less than 1.0 Ω of resistance between the control circuit terminal 2 and the control circuit terminal 1.
    • If greater than the specified range, test the control circuits for an open/high resistance. If circuits test normal, replace the power steering motor.
  5. Ignition OFF, test for greater than 1.0 MΩ of resistance between the control circuit terminal 2 and ground.
    • If less than the specified range, test the control circuit for a short to ground. If circuits test normal, replace the power steering motor.
  6. Ignition OFF, test for greater than 1.0 MΩ of resistance between the control circuit terminal 3 and ground.
    • If less than the specified range, test the control circuit for a short to ground. If circuits test normal, replace the power steering motor.
  7. Ignition OFF, test for greater than 1.0 MΩ of resistance between the control circuit terminal 1 and ground.
    • If less than the specified range, test the control circuit for a short to ground. If circuits test normal, replace the power steering motor.
  8. If all circuits test normal, test or replace the PSCM.
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