P0568

Circuit Description
The cruise Set/Coast switch is an input to the fuel control portion of the Powertrain Control Module (PCM). These inputs allow the PCM to control and hold a requested speed. A cruise Set/Coast switch sends an ignition voltage signal to the PCM when the Set/Coast switch is ON.

Conditions for Running the DTC
The ignition switch is in the ON position.

Conditions for Setting the DTC
^ The cruise switch is OFF.
^ The ignition voltage on the resume switch signal circuit.
or
^ The cruise switch is ON.
^ The resume switch is ON for longer than 25.5 seconds.

Action Taken When the DTC Sets
^ The PCM will not illuminate the Malfunction Indicator Lamp (MIL).
^ The PCM records the operating conditions at the time the diagnostic fails. This information is stored in the Failure Records.

Conditions for Clearing the MIL/DTC
^ The PCM will turn the MIL off after three consecutive trips without a fault condition.
^ A History DTC clears after forty consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures ^ The use of a scan tool.

Diagnostic Aids
If the Set/Coast switch is stuck in the ON position or the driver is holding the Set/Coast switch ON for longer than 25.5 seconds, DTC P0568 will set. DTC P0568 only checks the signal circuit for a short to voltage.

Test Description
The number(s) below refer to the step number(s) on the Diagnostic Table.
2. This step determines if the signal circuit is shorted to voltage.
3. This step determines if the PCM or the switch is malfunctioning.