P0568

DTC P0568

CIRCUIT DESCRIPTION




The cruise control set/coast switch is an input to the powertrain control module (PCM). The PCM uses the cruise control set/coast switch signal circuit in order to detect when the driver has requested to set the vehicle speed or to decelerate the vehicle speed. The PCM detects a high signal voltage on the cruise control set/coast switch signal circuit when the switch is applied.

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 control On/Off switch is ON.

CONDITIONS FOR SETTING THE DTC
The PCM detects a high signal voltage on the cruise control set/coast switch signal circuit for longer than 60 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The PCM stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Failure Records.
- The cruise control system 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
- Ensure that the set/coast switch is not stuck in the engaged position.
- For an intermittent condition, refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.

TEST DESCRIPTION

Steps 1 - 9:

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