P0568

DTC P0568

IMPORTANT: The DTC descriptor that the scan tool displays will not match this DTC due to DTCs P0567 and P0568 being reversed within the engine control module (ECM). This will only affect this vehicle for the 2004 model year.

Circuit Description
The cruise control resume/accel switch is an input to the ECM. The ECM uses the cruise control resume/accel switch signal circuit in order to detect when the driver has requested to accelerate the set vehicle speed or to resume the Cruise Control System. The ECM detects a voltage signal on the cruise control resume/accel switch signal circuit when the switch is applied.

Conditions for Running the DTC
The Ignition is ON.
The cruise control On/Off switch is ON.

Conditions For Setting The DTC
- The ECM detects a voltage signal on the cruise control resume/accel switch signal circuit for longer 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 resume/accel switch is not stuck or sticking in the engaged position.

Test Description

Steps 1-2:

Steps 3-9:

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