P0568

Diagnostic Chart:

Wiring Diagram:

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. This is a type D DTC.

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 disallow all of the cruise inputs.
^ TCC shift schedules may be affected.

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.

TEST DESCRIPTION
The number(s) below refer to the Step number(s) on the Diagnostic Table.
2. This Step determines it the signal circuit shorted to voltage.
3. This Step determines if the PCM or the switch is malfunctioning.