P0568

Diagnostic Chart:

Wiring Chart:

CIRCUIT DESCRIPTION

The cruise Set/Coast switch is an input to the fuel control portion of the 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 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 stores in the Failure Records.


CONDITIONS FOR CLEARING THE MIL/DTC

^ A History DTC will clear after forty consecutive warm-up cycles that the diagnostic does not fail (the coolant temperature has risen 5°C (40°F) from the start up coolant temperature and the engine coolant temperature exceeds 71°C (160°F) during that same ignition cycle).

^ 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.