Diagnostic Formats
WARNING: This page is about a different variant/trim than selected.
QUICK TEST and SYSTEM TESTS are diagnostic formats used to test and service EEC-V system. QUICK TEST under DIAGNOSIS & TESTING allows technician to identify problems and retrieve DTCs. SYSTEM TESTS check circuits, sensors and actuators.
Before starting any SYSTEM TEST, follow all steps under QUICK TEST to determine correct SYSTEM TEST. If vehicle passes QUICK TEST and no driveability symptoms or intermittent faults exist, EEC-V system is okay. If EEC-V system is okay, see SYMPTOM DIAGNOSIS under TROUBLE SHOOTING in FORD CD4E (MAZDA LA4A-EL) OVERHAUL article.