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Home >> Pontiac >> 2008 >> Torrent GXP, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 142 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC P0572 or P0573 >> Circuit/System Testing

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 connectors at the appropriate control modules listed below.
    • ECM X2 (LY7)
    • ECM X1 (LH2)
    • TCM
  2. Connect a test lamp between the appropriate signal circuit terminal listed below and ground.
    • ECM terminal 52 (LY7)
    • ECM terminal 7 (LH2)
    • TCM terminal 6 (6L50E)
    • TCM terminal F38 (5L40E)
  3. Ignition ON, verify the test lamp turns ON and OFF when pressing and releasing the brake pedal.
    • If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. Ignition OFF, connect the harness connector at the ECM module.
  5. Connect a test lamp between the appropriate signal circuit terminal listed below and ground.
    • TCM terminal 6 (6L50E)
    • TCM terminal F38 (5L40E)
  6. Ignition ON, verify the test lamp turns ON and OFF when pressing and releasing the brake pedal.
    • If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit test normal, replace the ECM.
  7. If all circuits test normal, replace the TCM.
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