P0568

DTC P0568

CIRCUIT DESCRIPTION
The cruise control set/coast switch is an input to the engine control module (ECM). The ECM monitors the cruise control set/coast switch signal circuit in order to detect when the driver has requested to set the vehicle speed or to allow the vehicle to coast. The ECM detects a voltage signal on the cruise control set/coast switch signal circuit when the switch is applied. This DTC sets if the ECM detects that voltage is present on the cruise control set/coast switch signal circuit for longer than 90 seconds.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0568 Cruise Control Set Switch Circuit

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.
The Cruise switch is ON.

CONDITIONS FOR SETTING THE DTC
The ECM detects the set/coast switch is ON for longer than 90 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The ECM stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The ECM 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 failed, or the current DTC, clears when the diagnostic runs and does not fail.
- 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
- Inspect for a set/coast switch stuck in the engaged position or the signal circuit is shorted to voltage.
- For an intermittent,

TEST DESCRIPTION

Step 1 - Step 9:

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