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. |
Reference Information
Schematic Reference
Connector End View Reference
Powertrain Control Module Connector End Views
Electrical Information Reference
Circuit/System Verification
- Verify that no other powertrain DTCs are set in the PCM.
- Replace the PCM.
| ⇒ | If other DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle . |
Repair Instructions
Control Module References for PCM replacement, setup, and programming
