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 (Component Tests and General Diagnostics).