Diagnostic Formats

QUICK TEST, CIRCUIT TESTS and PINPOINT TESTS are diagnostic formats used to test and service EEC-IV system. QUICK TEST allows technician to identify problems and retrieve Diagnostic Trouble Codes (DTCs). CIRCUIT TESTS check engine circuits, sensors and actuators. PINPOINT TESTS check transaxle circuits, sensors and actuators.

Before starting any circuit test, follow all steps under QUICK TEST to find correct circuit or pinpoint test. If vehicle passes QUICK TEST and no driveability symptoms or intermittent faults exist, EEC-IV system is okay.