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EC9-388 < DTC/CIRCUIT DIAGNOSIS > [R9M] LOW PRESSURE FUEL PUMP Is the inspection result normal? YES >> GO TO 4. NO >> Repair or replace error-detected parts. 4. CHECK FUEL PUMP CONTROL CIRCUIT 1. Disconnect fuel level sensor unit and fuel pump (main) harness connector. 2. Check the continuity between FPCM harness connector and fuel level sensor unit and fuel pump (main) 3. Also check harness for short to ground and to power. Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace error-detected parts. 5. CHECK LOW PRESSURE FUEL PUMP EC9-388, "Component Inspection (Low Pressure Fuel Pump)" . Is the inspection result normal? YES >> Replace FPCM. NO >> Replace low pressure fuel pump. Component Inspection (Low Pressure Fuel Pump) INFOID:0000000010500946 1. CHECK FUEL PRESSURE REGULATOR 1. Turn ignition switch OFF. 2. Check low fuel pressure. Is inspection result normal? YES >> INSPECTION END NO >> GO TO 2. 2. CHECK LOW PRESSURE FUEL PUMP 1. Turn ignition switch OFF. 2. Disconnect fuel level sensor unit and fuel pump (main). 3. Check resistance between fuel level sensor unit and fuel pump (main) terminals as follows. Is the inspection result normal? YES >> INSPECTION END NO >> Replace fuel level sensor unit and fuel pump (main). + − Continuity FPCM Fuel level sensor unit and fuel pump (main) Connector Terminal Connector Terminal B75 3 B94 1 Existed 4 4 5 3 6 2 + − Continuity Fuel level sensor unit and fuel pump (main) Terminals 2 3 Existed 4 |