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 RUNNING THE DTC
- The ignition is ON.
- The cruise control ON/OFF switch is ON.

CONDITIONS FOR SETTING THE DTC
This DTC sets when the ECM detects an invalid voltage signal on the cruise control set/coast and resume/accelerate switch signal circuit for greater than 1.5 seconds.

The ECM runs this diagnostic every 0.05 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The ECM stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records.
- The cruise control system is disabled.

CONDITIONS FOR CLEARING THE MIL/DTC
- A last test failed, or the current DTC, clears when the diagnostic runs and does not fail.
- A history DTC clears after 40 consecutive warm-up cycles, if failures are not reported by this or any other emission related diagnostic.
- Use a scan tool in order to clear the DTC.

DIAGNOSTIC AIDS
For an intermittent condition, refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.

TEST

Steps 1-2:

Steps 3-5:

Steps 6-10: