ECD SYSTEM(w/ DPF), Diagnostic DTC:P0090, P0091, P0092

DTC Code DTC Name
P0090 Fuel Pressure Regulator 1 Control Circuit / Open
P0091 Fuel Pressure Regulator 1 Control Circuit Low
P0092 Fuel Pressure Regulator 1 Control Circuit High

DESCRIPTION

Based on signals from the ECM, the pressure control valve (common rail assembly) opens when sudden deceleration occurs or when the ignition switch is turned off, to prevent the fuel pressure from becoming too high.

P0090, P0091, P0092
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 1 second

Open or short in pressure control valve (common rail assembly) circuit.

(1 trip detection logic)

  • Open or short in pressure control valve (common rail assembly) circuit

  • Pressure control valve (common rail assembly)

  • ECM

Tech Tips

When the fuel temperature is less than 10°C (50°F), both the pressure control valve (common rail assembly) and suction control valve (supply pump assembly) act in union to control the fuel pressure to the target fuel pressure.

WIRING DIAGRAM

A01VLT1E09
A01VLT1E10

CAUTION / NOTICE / HINT

Note


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

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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. INSPECT COMMON RAIL ASSEMBLY (PRESSURE CONTROL VALVE)


    1. Inspect the pressure control valve Click here.


    NG

    REPLACE COMMON RAIL ASSEMBLY (PRESSURE CONTROL VALVE) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (PRESSURE CONTROL VALVE - ECM)


    1. Disconnect the B66 pressure control valve connector.

    2. Disconnect the B104 ECM connector (for LHD).

    3. Disconnect the B103 ECM connector (for RHD).

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      B66-2 - B104-60 (PRV) Always Below 1 Ω
      B66-2 or B104-60 (PRV) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      B66-2 - B103-60 (PRV) Always Below 1 Ω
      B67-2 or B103-60 (PCV) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF PRESSURE CONTROL VALVE)


    1. A01VJATE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Pressure Control Valve)

      Disconnect the pressure control valve connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B66-1 - Body ground Ignition switch ON 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (PRESSURE CONTROL VALVE - NO. 1 INTEGRATION RELAY) Click here

    OK

  4. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off and wait for 30 seconds or more.

    6. Turn the ignition switch to ON and wait for 1 second or more.

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

    8. Read the DTCs.

      Result
      Result Proceed to
      DTC P0090, P0091 or P0092 is output A
      DTC is not output B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  5. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  6. CHECK HARNESS AND CONNECTOR (PRESSURE CONTROL VALVE - NO. 1 INTEGRATION RELAY)


    1. Disconnect the B66 pressure control valve connector.

    2. Remove the No. 1 integration relay from the engine room relay block.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      B66-1 - 1E-3 Always Below 1 Ω
      B66-1 or 1E-3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  7. CHECK ECM POWER SOURCE CIRCUIT


    1. Check the ECM power source circuit Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  9. REPLACE COMMON RAIL ASSEMBLY (PRESSURE CONTROL VALVE)


    1. Replace the common rail assembly Click here.


    NEXT

  10. BLEED AIR FROM FUEL SYSTEM


    1. Bleed air from fuel system Click here.


    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off and wait for 30 seconds or more.

    6. Turn the ignition switch to ON and wait for 1 second or more.

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

    8. Confirm that the DTC is not output again.


    NEXT

    END