Diagnostic Formats

When servicing the EEC system, always refer to the DIAGNOSTIC ROUTINE charts and QUICK TESTS before using CIRCUIT TESTS. The DIAGNOSTIC ROUTINE charts identify specific problems and refer the technician to specific repair areas, QUICK TESTS or CIRCUIT TESTS.

The QUICK TEST procedure is designed to allow the technician to identify problems and retrieve service codes. The CIRCUIT TESTS give procedures for testing circuits and checking sensors and actuators. If a vehicle passes the QUICK TEST procedures and there are no driveability problems, the EEC system is okay. Problem exists somewhere other than the EEC system.