ECD SYSTEM, Diagnostic DTC:P0090,P0091 and P0092

DTC Code DTC Name
P0090 Open Load of Pressure Control Valve Output
P0091 Short Circuit to Ground of Pressure Control Valve Output
P0092 Short Circuit to Battery of Pressure Control Valve Output

DESCRIPTION

The pressure discharge valve assembly is installed to the common rail assembly.

The ECM controls the pressure discharge valve assembly based on the signals from the fuel pressure sensor and maintains the fuel pressure inside the common rail assembly at the target set pressure.

Tip:

When the pressure discharge valve assembly is not supplied with current, the pressure discharge valve assembly is opened. For more information on the fuel system, refer to System Description.

Click here

A342523E02

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0090

Open Load of Pressure Control Valve Output

Open in pressure discharge valve circuit for 0.1 seconds.

(3 trip detection logic)

  • Open or short in pressure discharge valve circuit

  • Pressure discharge valve assembly

  • ECM

Does not come on

DTC stored

P0091

Short Circuit to Ground of Pressure Control Valve Output

Short to ground in pressure discharge valve circuit for 0.1 seconds or more for 0.05 seconds or more.

(3 trip detection logic)

  • Open or short in pressure discharge valve circuit

  • Pressure discharge valve assembly

  • ECM

Does not come on

DTC stored

P0092

Short Circuit to Battery of Pressure Control Valve Output

Short to power source in pressure discharge valve circuit for 0.1 seconds or more

(3 trip detection logic)

  • Open or short in pressure discharge valve circuit

  • Pressure discharge valve assembly

  • ECM

Does not come on

DTC stored
Table 1. Related Data List

DTC No.

Data List

P0090

P0091

P0092

  • Rail Pressure Control Valve - Current Value from Rail Pressure Valve Control

  • Target Common Rail Pressure

  • Common Rail Pressure

WIRING DIAGRAM

A351166E09

CAUTION / NOTICE / HINT

Note:

  • When replacing the ECM, the ECM needs registration and initialization.

    Click here

  • After replacing the pressure discharge valve, the ECM needs initialization.

    Click here

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

Tip:

  • 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 PRESSURE DISCHARGE VALVE ASSEMBLY

    1. Inspect the pressure discharge valve assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE PRESSURE DISCHARGE VALVE ASSEMBLYClick here

    OK

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

    1. Disconnect the pressure discharge valve assembly connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B128-2 (SPV-) - B112-60 (PRV)

      Always

      Below 1 Ω

      B128-2 (SPV-) or B112-60 (PRV) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    A351161C03

    *a

    Front view of wire harness connector

    (to Pressure Discharge Valve Assembly)

    1. Disconnect the pressure discharge valve assembly 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

      B128-1 (SPV+) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (PRESSURE DISCHARGE VALVE ASSEMBLY - EFI MAIN NO. 1 RELAY)Click here

    OK

  4. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  5. CHECK HARNESS AND CONNECTOR (PRESSURE DISCHARGE VALVE ASSEMBLY - EFI MAIN NO. 1 RELAY)

    1. Disconnect the pressure discharge valve assembly connector.

    2. Remove the EFI MAIN NO. 1 relay from the engine room and junction block.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B128-1 (SPV+) - 3 (EFI MAIN NO. 1 relay holder)

      Always

      Below 1 Ω

      B128-1 (SPV+) or 3 (EFI MAIN NO. 1 relay holder) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  6. CHECK ECM POWER SOURCE CIRCUIT

    1. Check the ECM power source circuit.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  8. REPLACE PRESSURE DISCHARGE VALVE ASSEMBLY

    1. Replace the pressure discharge valve assembly.

      Click here

    2. Perform fuel PCV compensation value reset.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  9. 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.

      Powertrain > Engine and ECT > Clear DTCs

    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.

      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

    Result

    Proceed to

    NEXT
    NEXT

    END