P0568

DTC P0568 Cruise Set Circuit






Circuit Description

The cruise set/coast switch is an input to the fuel control portion of the PGM. 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 cruise set/coast switch is OFF.
or
The cruise set/coast switch is ON.

Conditions for Setting the DTC

The ignition voltage is on the set/coast switch signal circuit.
or
The set/coast 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

^ A History DTC will clear after forty consecutive engine warm up cycles, if this or any other emission related diagnosic does not report any failures.
^ Use of a scan tool will clear the DTC codes.

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

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 switch is at fault.