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EC-1186 < COMPONENT DIAGNOSIS > [K9K] P1089 FUEL PUMP P1089 FUEL PUMP DTC Logic INFOID:0000000001162661 DTC DETECTION LOGIC NOTE: . - If DTC P1089 is displayed with DTC P0190, first perform trouble diagnosis for DTC P0190. Refer to . • Conditions for applying the diagnostic procedure to the stored DTCs: The DTC appears when the engine is running. • If the DTC is present: Diagnosis Procedure INFOID:0000000001162662 1. CHECK LOW PRESSURE FUEL SUPPLY SYSTEM EC-1043, "BASIC INSPECTION : Special Repair Requirement (TEST 1: Low Pressure Fuel Supply . Is the inspection result normal? OK >> GO TO 2. NG >> Replace or replace. Then GO TO 9. 2. CHECK INTERNAL FUEL TRANSFER PUMP Refer to EC-1044, "BASIC INSPECTION : Special Repair Requirement (TEST 2: Internal Fuel Transfer Pump Is the inspection result normal? OK >> GO TO 3. NG >> Replace or replace. Then GO TO 9. 3. CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE) EC-1044, "BASIC INSPECTION : Special Repair Requirement [TEST 3: High Pressure Supply Pump (Pressure Control Valve) Check]" Is the inspection result normal? OK >> GO TO 4. NG >> Replace or replace. Then GO TO 9. DTC No. Trouble diagnosis name Possible cause P1089 FUEL RAIL PRESSURE REGULATION FUNCTION control valve or Volumetric control valve) • 6.DEF: High pressure supply pump (Pressure control valve) oscillation tion • Harness or connectors [High pressure supply pump (volumetric • High pressure supply pump control valve) • High pressure supply pump (Volumetric control valve) • Fuel line |