DTC    P0090    Fuel Pressure Regulator 1 Control Circuit Open

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT COMMON RAIL ASSEMBLY (PRESSURE CONTROL VALVE)

CHECK HARNESS AND CONNECTOR (PRESSURE CONTROL VALVE - ECM)

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

CHECK WHETHER DTC OUTPUT RECURS

REPLACE ECM

CHECK HARNESS AND CONNECTOR (PRESSURE CONTROL VALVE - INTEGRATION RELAY)

CHECK ECM POWER SOURCE CIRCUIT

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE COMMON RAIL ASSEMBLY

BLEED AIR FROM FUEL SYSTEM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED