Idle Speed Drops In Drive
FAULT INDICATIONSIdle speed drops noticeably when drive or reverse positions are selected.
FAULT TRACING CONDITIONS
Before fault tracing, ensure that:
^ No diagnostic trouble codes are present,
^ The engine is at operating temperature, and
^ All fuses are clean and intact.
FAULT SOURCES
^ Open or short circuit in signal lead from transmission control module.
^ Excessive resistance in connector(s).
^ Faulty gear selector switch.
^ Faulty idle air control valve.
Computers and Control Systems