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Home >> Saturn >> 2005 >> Relay FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 224 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC P0568 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Pontiac Montana SV6, 2007 Chevrolet Uplander, and 2007 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, verify that the Cruise Resume/Accel. Switch parameter reads Active or Invalid.
    • If the parameter reads Inactive, go to Diagnostic Aids.
  2. Ignition OFF, disconnect the harness connector at the cruise control switch.
  3. Ignition ON, cruise control switch ON, observe the scan tool Cruise Resume/Accel. Switch parameter.
    • If the scan tool parameter reads Inactive, replace the cruise control switch assembly.
    • If the scan tool parameter reads Active or Invalid, test the cruise control switch signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
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