Engine Controls - Self-Diagnostics: Introduction
CAUTION:
DO NOT crank engine before replacement PCM is programed to immobilizer system or PCM will be severely damaged. If test procedures require replacement of PCM on a vehicle equipped with immobilizer system, vehicle must be sent to authorized Mazda dealer to have replacement PCM programed.
NOTE:
Vehicle with immobilizer system can be identified by a solid urethane ignition key head.
Perform all basic diagnostic procedures in BASIC DIAGNOSTIC PROCEDURES article for 2002 models or BASIC DIAGNOSTIC PROCEDURES article for 2003 models. If no fault is found while performing basic diagnostic procedures, proceed with self-diagnostics. If no diagnostic trouble codes or only pass codes (system functioning properly) are found during self-diagnostics, proceed to TROUBLE SHOOTING - NO CODES article for 2002 models or TROUBLE SHOOTING - NO CODES article for 2003 models, for diagnosis by symptom.