INSPECTION OF DIAGNOSIS CIRCUIT STOP Fuse EFI Fuse No. 1 Main Relay Fusible Link Battery Ignition S/W Check Engine Warning Light Check Connector ECU BAT +B M-REL W IG S/W T E1 1. Does CHECK ENG. warning light come on when ignition switch is at ON? YES System Normal NO Does CHECK ENG. light come on when ECU terminal W is grounded to the body? YES Check wiring between ECU terminal E1 and body ground OK Try another ECU NO Check bulb, fuse and wiring between ECU and ignition switch. BAD Repair or replace BAD Repair or replace 2. Does CHECK ENG. warning light go OFF when engine is started? YES System Normal NO Check wiring between ECU and CHECK ENG. warning light. BAD Repair OK Is there diagnosis code output when service connector is short circuited? NO Try another ECU YES Does CHECK ENG. warning light go out after repair according to malfunction code? NO Further repair required YES System OK Cancel out Diagnostic code