P1554
CIRCUIT DESCRIPTIONThe powertrain control module (PCM) has the ability to inhibit cruise control operation if conditions exist that would make cruise operation undesirable. The following conditions may inhibit cruise control operation:
^ The engine speed is too high or too low.
^ The vehicle speed is too high or too low.
^ The traction control has been active for longer than 1 second.
^ The vehicle acceleration or deceleration rate is too high.
CONDITIONS FOR RUNNING THE DTC
The PCM is commanding the cruise control module to inhibit cruise control operation.
CONDITIONS FOR SETTING THE DTC
The PCM detects a cruise engaged signal from the cruise control module, while inhibiting cruise control operation.
ACTION TAKEN WHEN THE DTC SETS
^ The PCM will not illuminate the malfunction indicator lamp (MIL).
^ The PCM will store the conditions present when the DTC set as Failure Records data only.
CONDITIONS FOR CLEARING THE DTC
^ The DTC becomes history when the conditions for setting the DTC are no longer present.
^ A history DTC will clear after 40 malfunction free warm-up cycles.
^ The PCM receives a clear code command from the scan tool.
DIAGNOSTIC AIDS
If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for intermittent and Poor Connections in Diagnostic Aids.
TEST
