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2 CHECK POWER SUPPLY 1. Stop engine. SEF986W Voltage: Battery voltage OK or NG OK © GO TO 4. NG © GO TO 3. 3 DETECT MALFUNCTIONING PART Check the following. I 10A fuse I Harness connectors M50, F104 I Harness for open or short between injector and fuse © Repair harness or connectors. 4 CHECK OUTPUT SIGNAL CIRCUIT 1. Turn ignition switch “OFF”. Refer to wiring diagram. Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG OK © GO TO 6. NG © GO TO 5. 5 DETECT MALFUNCTIONING PART Check the harness for open or short between ECM and injector. © Repair open circuit or short to ground or short to power in harness or connectors. INJECTOR QG16 I 18DE Diagnostic Procedure (Cont’d) EC-321 |