P0564

DTC P0564

Circuit Description

The cruise control switch is an input to the engine control module (ECM). The ECM 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 ECM 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.

Conditions for Setting the DTC

* Engine is running.
* Ignition voltage is greater than 7.9956 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.
* DTC(s) can be cleared by using the scan tool.

Diagnostic Aids

For an intermittent condition, refer to "Intermittents".