P0564
DTC P0564CIRCUIT DESCRIPTION
CAUTION: REFER TO SIR CAUTION IN SERVICE PRECAUTIONS.
Disable the inflatable restraint steering wheel module when performing this diagnostic table. Refer to SIR Disabling and Enabling Zone 3 in Restraint Systems.
The cruise control switch is an input to the powertrain control module (PCM). The PCM 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 PCM 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 switch is ON.
CONDITIONS FOR SETTING THE DTC
This DTC sets if the PCM detects that the voltage on the cruise control set/coast and resume/accelerate switch signal circuit is 3.5 volts or above for greater than 2 seconds.
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 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 MIL/DTC.
DIAGNOSTIC AIDS
Rotate the steering wheel to both steering stops and activate each cruise control switch separately. With a scan tool, observe the associated Cruise Control Switch parameter in the PCM Cruise Control data list. This will help eliminate the possibility of an internally shorted inflatable restraint steering wheel module coil.
For an intermittent condition, refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.
TEST
