P0574

CIRCUIT DESCRIPTION
The cruise control module uses the cruise engaged circuit to request cruise control. If improper conditions are present, the PCM will disable cruise control via the cruise inhibit control circuit. During cruise control, if the PCM detects a vehicle speed greater than the calibrated value, the PCM will inhibit the cruise control system, and set DTC P0574.

CONDITIONS FOR RUNNING THE DTC
^ Cruise control is enabled.
^ Cruise control is engaged.

CONDITIONS FOR SETTING THE DTC
The PCM detects a vehicle speed greater than 176 km/h (110 mph).

ACTION TAKEN WHEN THE DTC SETS
^ The PCM disables cruise control.
^ The PCM will not illuminate the malfunction indicator lamp (MIL).
^ The PCM will store conditions which were present when the DTC set as Fail Records data only.

CONDITIONS FOR CLEARING THE DTC
^ The History DTC will clear after 40 consecutive warm-up cycles have occured without a malfunction.
^ The DTC can be cleared by using the scan tool Clear DTC Information function.

DIAGNOSTIC AIDS
If the condition is intermittent, refer to Intermittent Conditions in Symptoms. Symptom Related Diagnostic Procedures

This diagnostic trouble code (DTC) is an information DTC only. The DTC indicates the reason that the PCM disabled the cruise control system. Be sure to verify with the customer the conditions that set the DTC. Reviewing the Failure Records vehicle mileage since the diagnostic test last tailed may assist in diagnosing the condition. The information may help determine how often the condition that set the DTC occurs.

TEST

Steps 1-3: