Self-Diagnostic System: Notes

NOTE: For additional information and operating procedures for self-diagnostic system, refer to TESTS W/CODES article in the ENGINE PERFORMANCE Section.

Self-diagnostic system is capable of detecting ECCS malfunctions and storing related trouble code. Since intermittent codes are also stored, all codes are available for interpretation, unless codes have been cleared or ignition has been cycled 50 times since malfunction last occurred.

Self-diagnostic system will be operated in one of 2 modes. Modes are manually changed using screwdriver through access port on ECU.

Turn ignition off. Turn ignition on with engine off. With screwdriver turned fully clockwise, inspection lights will begin to flash (at least 2 seconds). When desired mode has been entered, turn screwdriver fully counterclockwise. In different modes, Red LED located on side of ECU will perform different functions. CHECK ENGINE light located on dash will flash simultaneously with Red LED.