P0568

CIRCUIT DESCRIPTION
The cruise control Set/Coast switch is an input to the Powertrain Control Module (PCM). This input allows the PCM to control and hold a requested speed. The cruise control Set/Coast switch sends a ignition positive voltage signal to the PCM when the momentary switch is applied. This DTC sets if the PCM senses a voltage on the Set/Coast switch signal circuit when the voltage is not expected.

CONDITIONS FOR RUNNING THE DTC
The Cruise switch is ON.

CONDITIONS FOR SETTING THE DTC
The PCM detects the Set/Coast switch is ON for longer than 90 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM stores the DTC information into memory when the diagnostic runs and fails.
^ The Malfunction Indicator Lamp (MIL) will not illuminate.
^ The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Failure Records.
^ The cruise is disabled.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A last test tailed, or the current DTC, clears when the diagnostic runs and does not tail.
^ A history DTC clears after 40 consecutive warm-up cycles, if failures are not reported by this or any other emission related diagnostic.
^ Use a scan tool in order to clear the MIL/DTC.

DIAGNOSTIC AIDS

IMPORTANT:
^ Remove any debris from the PCM connector surfaces before servicing. Inspect the PCM connector gaskets when diagnosing/replacing the module. Ensure that the gaskets are installed correctly.
^ For any test that requires probing the PCM or a component harness connector, use the Connector Test Adapter kit J 35616-A. Using this kit prevents damage to the harness/component terminals. Refer to Using Connector Test Adapters in Diagrams.
^ Inspect for a set/coast switch stuck in the engaged position or the signal circuit is shorted to voltage.
^ For an intermittent, refer to Testing for Intermittent and Poor Connections in Diagrams.

TEST DESCRIPTION

Steps 1-9:

The number below refers to the step number on the diagnostic table.
2. This step determines if condition is present.