ECD SYSTEM, Diagnostic DTC:P0089

DTC Code DTC Name
P0089 Fuel Pressure Regulator 1 Performance

DESCRIPTION

A pressure discharge valve mounted on the common rail assembly.

converts the fuel pressure inside the common rail assembly into an electric signal, and outputs it to the ECM. The ECM controls the supply pump assembly in order to maintain the fuel pressure inside the common rail assembly at a target pressure calculated by the ECM.

DTC No. DTC Detection Condition Trouble Area
P0089

Overtemperature detected in rail pressure regulating valve circuit for 0.2 seconds.

(3 trip detection logic)

  • Cooling fan system

  • ECM

CAUTION / NOTICE / HINT

Note

When replacing the ECM, the ECM needs Registration and Initialization Click here.

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (ACTUATOR TEST OF FAN HIGH SPEED AND LOW)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Actuator Test of Fan High Speed and Actuator Test of Fan Low Speed.

      OK
      Cooling fan operates according to operation.

    NG

    REPAIR OR REPLACE COOLING FAN SYSTEM Click here

    OK

  2. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  3. REPAIR OR REPLACE COOLING FAN SYSTEM


    1. Repair or replace the cooling fan system Click here.


    NEXT

  4. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    8. Confirm that the DTC is not output again.


    NEXT

    END