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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the PNP switch harness connector.
  2. Ignition ON, verify the scan tool TR. Sw. A/B/C/P parameter is HI/HI/HI/HI.
    • If not the specified value, test each signal circuit for a short to ground. If all circuits test normal, replace the TCM.
  3. Ignition OFF, test for less than 10 ohms between terminal 11 on the harness side and ground.
    • If greater than the specified value, check the ground circuit for an open/high resistance.
  4. If all circuits test normal test or replace the PNP Switch.
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