ECD SYSTEM, Diagnostic DTC:P1114, P1192, P1668

DTC Code DTC Name
P1114 Electric Injection Fuel Cut-off
P1192 Hydraulic Fuel Cut-off by PCV and VCV
P1668 Fuel Cut-off not Plausible

DESCRIPTION

DTC No. DTC Detection Condition Trouble Area Possible to Detect
Ignition Switch Engine Run
P1114 Engine cut-off function fault (Electric cut-off by injection).

  • ECM

  • Injector

  • Injector circuit

 - -
P1192 Engine cut-off function fault (Fuel cut-off by PCV and VCV).

  • ECM

  • PCV

  • PCV circuit

  • VCV

  • VCV circuit

 - -
P1668

Engine cut-off function fault (Fuel cut-off plausible).

(1 trip detection logic)

  • ECM

  • Injector

  • Injector circuit

  • PCV

  • VCV

 - -

FAIL-SAFE

DTC No. Fail-safe Operation Fail-safe Deactivation Condition
P1114

  • Cut-off piezo power stage.

  • Common rail pressure fall down.

  • Engine reaction: engine stall

 -
P1192

  • Cut-off piezo power stage.

  • Common rail pressure fall down.

  • Engine reaction: engine stall

 -
P1668 Limits the engine speed (2,000 rpm). Ignition switch OFF

WIRING DIAGRAM

A0138SPE04
A0138HCE02
A0138HCE01

INSPECTION PROCEDURE

Tech Tips


  • 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.).

  • When DTC P1114, P1192 or P1668 is detected, check the injector voltage by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / Inj Volt.


    • Reference:


      • Idling: Approximately 70 V

  • This malfunction detection is done after ignition switch off.

PROCEDURE


  1. CHECK DTC OUTPUT (P1114, P1192 AND/OR P1668)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position and turn the intelligent tester on.

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

    4. Read the DTCs displayed on the intelligent tester.

      Result
      Display (DTC Output) Proceed To
      P1114, P1192 and/or P1668 A
      Only P1192 B

    B

    PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE VCV) Click here

    A

  2. CHECK INJECTOR


    1. A0138ZUE01

      Disconnect the N1, N2, N3 and N4 injector connectors.

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

      Standard resistance
      Tester Connection Specified Condition
      1 - 2 150 to 250 kΩ

    NG

    REPLACE INJECTOR (S)

    OK

  3. CHECK HARNESS AND CONNECTOR (INJECTOR - ECM)


    1. A0138J3E01

      Disconnect the B54 ECM connector.

    2. Disconnect the N1, N2, N3 and N4 injector connectors.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      #10 (B54-28) - Injector (No.1) (N1-1) Below 1 Ω
      PINJ1 (B54-29) - Injector (No.1) (N1-2) Below 1 Ω
      #20 (B54-25) - Injector (No.2) (N2-1) Below 1 Ω
      PINJ2 (B54-30) - Injector (No.2) (N2-2) Below 1 Ω
      #30 (B54-26) - Injector (No.3) (N3-1) Below 1 Ω
      PINJ3 (B54-32) - Injector (No.3) (N3-2) Below 1 Ω
      #40 (B54-27) - Injector (No.4) (N4-1) Below 1 Ω
      PINJ4 (B54-31) - Injector (No.4) (N4-2) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      #10 (B54-28) or Injector (No.1) (N1-1) - Body ground 10 kΩ or higher
      PINJ1 (B54-29) or Injector (No.1) (N1-2) - Body ground 10 kΩ or higher
      #20 (B54-25) or Injector (No.2) (N2-1) - Body ground 10 kΩ or higher
      PINJ2 (B54-30) or Injector (No.2) (N2-2) - Body ground 10 kΩ or higher
      #30 (B54-26) or Injector (No.3) (N3-1) - Body ground 10 kΩ or higher
      PINJ3 (B54-32) or Injector (No.3) (N3-2) - Body ground 10 kΩ or higher
      #40 (B54-27) or Injector (No.4) (N4-1) - Body ground 10 kΩ or higher
      PINJ4 (B54-31) or Injector (No.4) (N4-2) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK POWER SOURCE CIRCUIT


    1. Check that the battery voltage, ECM power source voltage, and the ground condition of the ECM are normal.

      OK
      The battery voltage, ECM power source voltage, and the ground condition of the ECM are normal.

      Tech Tips

      Make sure that the battery is not discharged during the inspection.


    NG

    REPAIR POWER SOURCE CIRCUIT

    OK

  5. CHECK DTC OUTPUT (REFER TO RESULT OF STEP 1)

    Tech Tips

    Read the output DTCs and proceed to appropriate step shown in the table below.

    Result
    Display (DTC Output) Proceed To
    Except P1668 A
    Include P1668 B

    B

    PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE VCV) Click here

    A

    REPLACE ECM

  6. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE VCV)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position and turn the intelligent tester on.

    3. Clear the DTC Click here.

    4. Select the following menu items: Powertrain / Engine and ECT / Active Test / Flow Regulator.

    5. Check the operation of the VCV while operating it using the intelligent tester.

      OK
      Flow regulator active test Condition
      Active test performed VCV vibrates
      Active test not performed VCV does not vibrate

    NG

    CHECK VCV Click here

    OK

  7. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE PCV)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position and turn the intelligent tester on.

    3. Clear the DTC Click here.

    4. Select the following menu items: Powertrain / Engine and ECT / Active Test / Pres Regul.

    5. Check the operation of the PCV while operating it using the intelligent tester.

      OK
      Fuel regulator pressure active test Condition
      Active test performed PCV vibrates
      Active test not performed PCV does not vibrate

    NG

    CHECK PCV Click here

    OK

  8. CHECK IF DTC RECURS (P1114, P1192 AND/OR P1668)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Start the engine.

    4. Turn the intelligent tester on.

    5. Stop the engine and wait for 3 minutes.

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

    7. Read the DTCs displayed on the intelligent tester.

      Result
      Display (DTC Output) Proceed To
      No output A
      P1114, P1192 and/or P1668 B

    B

    REPLACE ECM

    A

    END

  9. CHECK PCV


    1. A0136SZE01

      Disconnect the B43 PCV connector.

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

      Standard resistance
      Tester Connection Specified Condition
      1 - 2 1.5 to 15 Ω

    NG

    REPLACE SUPPLY PUMP (PCV)

    OK

  10. CHECK HARNESS AND CONNECTOR (PCV - ECM)


    1. A0138RQE05

      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

  11. REPLACE SUPPLY PUMP (PCV)


    NEXT

  12. CHECK IF DTC RECURS (P1114, P1192 AND/OR P1668)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Start the engine.

    4. Turn the intelligent tester on.

    5. Stop the engine and wait for 3 minutes.

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

    7. Read the DTCs displayed on the intelligent tester.

      Result
      Display (DTC Output) Proceed To
      No output A
      P1114, P1192 and/or P1668 B

    B

    REPLACE ECM

    A

    END

  13. CHECK VCV


    1. A0136SZE02

      Disconnect the B33 VCV connector.

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

      Standard resistance
      Tester Connection Specified Condition
      1 - 2 1.5 to 15 Ω

    NG

    REPLACE SUPPLY PUMP (VCV)

    OK

  14. CHECK HARNESS AND CONNECTOR (VCV - ECM)


    1. A0137GME02

      Disconnect the B53 ECM connector.

    2. Disconnect the B33 VCV connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      VCV (B53-48) - VCV (B33-2) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      VCV (B53-48) or VCV (B33-2) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. REPLACE SUPPLY PUMP (VCV)


    NEXT

  16. CHECK IF DTC RECURS (P1114, P1192 AND/OR P1668)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Start the engine.

    4. Turn the intelligent tester on.

    5. Stop the engine and wait for 3 minutes.

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

    7. Read the DTCs displayed on the intelligent tester.

      Result
      Display (DTC Output) Proceed To
      No output A
      P1114, P1192 and/or P1668 B

    B

    REPLACE ECM

    A

    END