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4 CHECK HEAT UP SWITCH POWER SUPPLY CIRCUIT 1. Turn heat up switch “OFF”. MEC983D Voltage: Battery voltage OK or NG OK E GO TO 6. NG E GO TO 5. 5 DETECT MALFUNCTIONING PART Check the following. I Fuse block (J/B) connector F48 I 10A fuse I Harness for open or short between heat up switch and fuse E Repair open circuit or short to ground or short to power in harness or connectors. 6 CHECK HEAT UP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN OR SHORT 1. Turn ignition switch “OFF”. Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG OK E GO TO 7. NG E Repair open circuit or short to ground or short to power in harness or connectors. HEAT UP SWITCH ZD30DDTi Diagnostic Procedure (Cont’d) EC-261 |