P0564

DTC P0564

Circuit Description

The cruise control switch is an input to the instrument panel cluster (IPC). The IPC monitors the cruise control set/coast and resume/accelerate switch signal circuit in order to detect when a cruise control function has been requested. The IPC detects a specific voltage signal on the cruise control set/coast and resume/accelerate switch signal circuit when a cruise control function switch is activated, with each switch having a different predetermined voltage value. Once a cruise control function has been requested, the IPC sends a command via serial data to the engine control module (ECM).

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0564 Cruise Control Multi-function Switch Circuit

Conditions for Setting the DTC

* The engine is running.
* Ignition voltage is greater than 8 volts.

Action Taken When the DTC Sets

* The malfunction indicator lamp (MIL) will not illuminate.
* The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
* A history DTC is stored.

Conditions for Clearing the MIL/DTC

* A history DTC will clear after 40 warm-up cycles without a fault.
* DTCs can be cleared by using the scan tool.

Diagnostic Aids

For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections).