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DAS-166 < DTC/CIRCUIT DIAGNOSIS > [BSW] POWER SUPPLY AND GROUND CIRCUIT YES >> GO TO 2. NO >> Be sure to eliminate cause of malfunction before installing new fuse. 2. CHECK PUMP CONTROL UNIT POWER SUPPLY CIRCUIT Check voltage between pump control unit harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair the pump control unit power supply circuit. 3. CHECK PUMP CONTROL UNIT GROUND CIRCUIT 1. Turn the ignition switch OFF. 2. Disconnect the pump control unit connector. 3. Check for continuity between pump control unit harness connector and ground. Is the inspection result normal? YES >> INSPECTION END NO >> Repair the pump control unit ground circuit. Terminal Condition Standard voltage Reference voltage (+) (–) Pump control unit Ignition switch Connector Terminal Connector Terminal D170 12 D170 5 OFF 0 - 0.1 V 0 V ON 9.5 - 16 V Battery volt- age Pump control unit Ground Continuity Connector Terminal D170 5 Existed |