P0564

DTC P0564

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0564 Cruise Control Multi-Function Switch Circuit

DIAGNOSTIC FAULT INFORMATION
Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

CIRCUIT/SYSTEM 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 voltage signal on the cruise control set/coast switch signal circuit when the switch is applied.

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
The PCM detects a fault affecting cruise control system operation.

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.

DIAGNOSTIC AIDS
- Ensure that the set/coast and the resume/accel switch are not stuck in the engaged position.
- Repair all other DTCs and emissions related symptoms before performing this diagnostic.

CIRCUIT/SYSTEM VERIFICATION
1. Verify that no other powertrain DTCs are set in the PCM.
- If other DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. Diagnostic Trouble Code Descriptions
2. Replace the PCM.

REPAIR INSTRUCTIONS
Control Module References for PCM replacement, setup, and programming