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2 CHECK POWER SUPPLY-I 1. Turn ignition switch “OFF” and then “ON”. SEF981W Voltage: Battery voltage OK or NG OK © GO TO 9. NG © GO TO 3. 3 DETECT MALFUNCTIONING PART Check the following. I 10A Fuse I 40A fusible link I Harness connectors M50, F104 I Harness for open or short between ECM and fuse block I Harness for open or short between fuse block and ignition switch © Repair harness or connectors. 4 CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I 1. Turn ignition switch “OFF”. Refer to WIRING DIAGRAM. Continuity should exist. 4. Also check harness for short to power. OK or NG OK © GO TO 5. NG © Repair open circuit or short to power in harness or connectors. TROUBLE DIAGNOSIS FOR POWER SUPPLY QG16 I 18DE Main Power Supply and Ground Circuit (Cont’d) EC-105 |