INSPECTION OF DIAGNOSIS CIRCUIT ECU BATT +B +B1 M-REL IG SW W TE1 E1 Fusible Link AM2 30A Fuse EFI 15A EFI Main Relay Ignition Switch AM2 IG2 AM1 IG1 Fusible Link ALT 100A AM1 40A Fusible Link MAIN 2.0L IGN 7.5A GAUGE 7.5A "CHECK" Engine Warning Light Battery Check Connector TE1 E1 FJ3A11 1. Does "CHECK ENGINE" warning light come on when ignition switch is at ON? YES → System Normal NO ↓ Does "CHECK ENGINE" warning 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 ENGINE" warning light go off when the engine is started? YES → System Normal NO ↓ Check wiring between ECU and "CHECK ENGINE" warning light. BAD → Repair. OK ↓ Is there diagnostic code output when check connector terminals TE1 and E1 are connected? NO → Check wiring between check connector terminal TE1 and check connector terminal TE1, and ECU terminal E1 and check connector terminal E1. YES ↓ Does "CHECK ENGINE" warning light go out after repairing according to malfunction code? OK NO → Further repair required. → Try another ECU. YES ↓ System OK → Cancel out diagnostic code.