ECD SYSTEM, Diagnostic DTC:P0089, P0091, P0092, P1210

DTC Code DTC Name
P0089 Pressure Control Valve Plausibility to Consume Current High Intensity
P0091 Short to GND in Pressure Control Valve Circuit
P0092 Short to B+ in Pressure Control Valve Circuit
P1210 Open in Pressure Control Valve Circuit

DESCRIPTION

This circuit adjusts the PCV (pressure control valve) opening angle based on the signals from the ECM in order to control the pressure in the common rail. When the ignition switch is turned to the ON position, the coil attracts the valve based on the signals from the ECM to close the fuel path.

If the ECM detects that the fuel pressure in the common rail is likely to exceed the specified value based on the signals from the pressure sensor on the common rail, this circuit controls the current to the coil to open the valve. As a result, the fuel pressure is reduced to maintain the specified pressure.

If the ignition switch is turned off, the current to the control valve coil is shut off and fuel pressure opens the valve. If the fuel pressure drops below the spring force of the control valve, the valve closes.

When the current to the PCV circuit is stopped, the pressure in the common rail should be approximately 5 MPa (50 bars, 725 psi).

When a current is applied to the coil, an additional force is added to that of the spring. The control signal is DUTY, and the average current is 0.6 A with peak of 2 A. The injector needle return spring tension is set to 7 MPa (70 bars, 1,015 psi). This pressure is higher than the pressure of the PCV, which is set at 5 MPa (50 bars, 725 psi). In this way, the injector will not open if the PCV does not operate.

A0137XNE02
DTC No. DTC Detection Condition Trouble Area Possible to Detect
Ignition Switch Engine Run
P0089

Current of the PCV circuit is more than 2 A for 2 sec. or more

(1 trip detection logic)

  • PCV

 ON ON
P0091

Short in PCV circuit for 0.1 sec. or more

(1 trip detection logic)

  • PCV

  • PCV circuit

  • ECM

 - ON
P0092

Short in PCV circuit (Power supply side) for 0.1 sec. or more

(1 trip detection logic)

  • PCV

  • PCV circuit

  • ECM

 - ON
P1210

Open in PCV circuit for 0.1 sec. or more

(1 trip detection logic)

  • PCV

  • PCV circuit

  • ECM

 - ON

FAIL-SAFE

DTC No. Fail-safe Operation Fail-safe Deactivation Condition
P0089

  • Limits the engine power.

  • Limits the PCV current.

 Normal condition is restored.
P0091

  • Limits the PCV duty (less than 12.8%).

  • Limits the engine power or engine stall.

 Normal condition is restored.
P0092

  • Limits the PCV duty (less than 12.8%).

  • Limits the engine power or engine stall.

 Normal condition is restored.
P1210

  • Limits the PCV duty (less than 12.8%).

  • Limits the engine power or engine stall.

 Normal condition is restored.

WIRING DIAGRAM

A0138HCE02

INSPECTION PROCEDURE

Tech Tips


  • When DTC P0089, P0091, P0092 or P1210 is detected, check the target common rail pressure by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / Tag Comn Rail Pres.

  • When DTC P0089, P0091, P0092 or P1210 is detected, check the common rail pressure by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / Comn Rail Pres.

  • When DTC P0089, P0091, P0092 or P1210 is detected, check the pressure regulator duty by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / Pres Regul Duty.


    • Reference:


      • Warmed up and idling: 8 to 18%

  • If DTC P0001, P0002, P0003, P0004, P2141, P2142, or P2143 is output at the same time as DTC P0089, P0091, P0092, or P1210, a malfunction may be present in the EFI main relay circuit Click here.

  • If the ECM is replaced, variant coding (variant coding indicates the presence of vehicle accessory items, A/C, etc.) should always be performed Click here.

  • Before removing the ECM and the peripheral parts, wait at least 3 minute after turning the ignition switch off (If the cooling fan is operating, remove the ECM and the peripheral parts after the fan stops.).

  • The resistance of PCV is 1.5 to 15 Ω.

PROCEDURE


  1. INSPECT PCV (VOLTAGE)


    1. A01373FE01

      Disconnect the B43 PCV connector.

    2. Turn the ignition switch to the ON position.

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

      Standard voltage
      Tester Connection Specified Condition
      PCV (B43-1) - Body ground 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - PCV) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (PCV - ECM)


    1. A0138RQE01

      Disconnect the B53 ECM connector.

    2. Disconnect the B43 PCV connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      PCV (B53-44) - PCV (B43-2) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      PCV (B53-44) or PCV (B43-2) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE SUPPLY PUMP (PCV)


    NEXT

  4. CHECK IF DTC RECURS (P0089, P0091, P0092 AND/OR P1210)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Start the engine turn the intelligent tester on.

    4. Select the following menu items: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs displayed on the intelligent tester.

      Result
      Display (DTC output) Proceed To
      No output A
      P0089, P0091, P0092 and/or P1210 B

    B

    REPLACE ECM

    A

    END

  5. CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - PCV)


    1. A01381KE01

      Disconnect the B43 PCV connector.

    2. Remove the engine room R/B.

    3. Remove the engine room R/B lower cover.

    4. Disconnect the 1C engine room R/B connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      PCV (B43-1) - Engine room R/B (1C-5) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      PCV (B43-1) or Engine room R/B (1C-5) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT EFI MAIN RELAY (VOLTAGE)


    1. A0136WEE01

      Remove the engine room R/B.

    2. Remove the engine room R/B lower cover.

    3. Disconnect the 1H engine room R/B connector.

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

      Standard voltage
      Tester Connection Specified Condition
      Engine room R/B (1H-1) - Body ground 11 to 14 V

    NG

    CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY - EFI MAIN RELAY)

    OK

  7. CHECK HARNESS AND CONNECTOR (EFI MAIN RELAY - ECM)


    1. A0136WNE01

      Disconnect the B54 ECM connector.

    2. Remove the engine room R/B.

    3. Remove the engine room R/B lower cover.

    4. Disconnect the 1C engine room R/B connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      MREL (B54-14) - Engine room R/B (1C-8) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      MREL (B54-14) or Engine room R/B (1C-8) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. REPLACE ENGINE ROOM R/B (EFI MAIN RELAY)


    NEXT

  9. CHECK IF DTC RECURS (P0089, P0091, P0092 AND/OR P1210)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Start the engine and turn the intelligent tester on.

    4. Select the following menu items: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs displayed on the intelligent tester.

      Result
      Display (DTC output) Proceed To
      No output A
      P0089, P0091, P0092 and/or P1210 B

    B

    REPLACE ECM

    A

    END