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Home >> Chevrolet >> 2012 >> Traverse LS, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Diagnostic Information and Procedures >> DTC P0571 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the X2 harness connector at the ECM.
  2. Connect a test lamp between the control circuit terminal 52 X2 and ground.
  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 control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    • 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 BCM.
  4. If all circuits test normal, replace the ECM.
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