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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (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 Cadillac DTS. 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 X1
    • TCM
  2. Connect a test lamp between the appropriate signal circuit terminal listed below and ground.
    • ECM terminal 7
    • TCM terminal 42
  3. Ignition ON, verify the test lamp turns ON and OFF while 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 TCM.
  5. Connect a test lamp between the signal circuit terminal 7 and ground.
  6. Ignition ON, verify the test lamp turns ON and OFF while pressing and releasing the brake pedal.
    • If the test lamp is always OFF, test the signal circuit for an open/high resistance. If the circuit test normal, replace the TCM.
  7. If all circuits test normal, replace the ECM.
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