P0568

DTC P0568

CIRCUIT DESCRIPTION




The cruise control set/coast switch is an input to the engine control module (ECM)/ powertrain control module (PCM). The ECM/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 ECM/PCM detects a high signal voltage on the cruise control set/coast switch signal circuit when the switch is applied. This DTC sets when the ECM/PCM detects a high signal voltage on the cruise control set/coast switch signal circuit for longer than 60 seconds.

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

The cruise control On/Off switch is ON.

CONDITIONS FOR SETTING THE DTC
The ECM/PCM detects the set/coast switch is applied for longer than 60 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The ECM/PCM stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The ECM/PCM records the operating conditions at the time the diagnostic fails. The ECM/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 Testing for Intermittent and Poor Connections in Diagnostic Aids.

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.