P0568

DTC P0568

CIRCUIT DESCRIPTION
The cruise control set/coast switch is an input to the engine control module (ECM). The ECM 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 detects a voltage signal 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
- This DTC sets if the ECM Detects a voltage signal on the cruise control set/coast switch signal circuit for greater than 60 seconds.
- This ECM runs this diagnostic every 0.05 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 ECM 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 or sticking in the engaged position.
For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics

TEST DESCRIPTION

Step 1 - Step 9:

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