ECD SYSTEM (w/ EGR Cooler Bypass Valve), Diagnostic DTC:P0200

DTC Code DTC Name
P0200 Injector Circuit / Open

DESCRIPTION

Tech Tips


  • For more information on the injector driver (EDU), refer to the system description Click here.

  • If P0200 is present, refer to the "Diagnostic Trouble Code (DTC) Table for Common Rail System" Click here.

The EDU drives the fuel injector assembly at high speeds. The EDU delivers high-speed drive signals under high-pressure fuel conditions using the DC/DC converter, which provides a high-voltage and quick-charging system.

Soon after the EDU receives an injection command (IJt) signal from the ECM, the EDU responds to the command with an injector injection confirmation (IJf) signal when the current is applied to the fuel injector assembly.

A01KIBZE01
DTC No. DTC Detection Condition Trouble Area
P0200

Open or short in injector driver (EDU) or injector circuit

After engine is started, there is no IJf signal from EDU to ECM, despite ECM sending IJt signals to EDU

(1 trip detection logic)

  • Open or short in EDU circuit

  • Fuel injector assembly

  • EDU

  • ECM

MONITOR DESCRIPTION


The fuel injector assembly is grounded over a Field Effect Transistor (FET) and a serial resistor. This resistor creates a voltage drop, which is monitored by the EDU (injector drive circuit), in relation to the current drawn by the fuel injector assembly. When the injector current becomes too high, the voltage drop over the resistor exceeds a specified level and no IJF signal for that cylinder is sent to the ECM.

P0200 refers to a malfunction in the EDU or injector circuit.

If this DTC is set, the ECM enters fail-safe mode and limits the engine power. The fail-safe mode continues until the ignition switch is turned off

A01KFU7E05

WIRING DIAGRAM

A01KGVGE01

INSPECTION PROCEDURE

Tech Tips


  • If P0200 and P1271 are present simultaneously, there is an open in the INJF wire harness between the EDU and ECM, or there is an open in the wire harness for both fuel injector assembly and pressure discharge valve.

  • Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, and other data from the time the malfunction occurred.

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (COMPENSATION OF INJECTION VOLUME BETWEEN CYLINDERS)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine and warm it up. Turn the tester on.

    3. Select the following menus: Powertrain / Engine and ECT / Data List / Injection Feedback Val #1, #2, #3 and #4.

    4. Read values.

      Standard
      The compensatory injection volume is less than 3.0 mm3

      Tech Tips


      • If the fuel injector assembly is malfunctioning, the compensatory injection volume remains at 5.0 mm3.

      • P0200 will also be output when there is a disconnection of the wiring between the injector driver (EDU) and the injector.

      • If there is a disconnection, the feedback value will increase and +5.0 mm3will be indicated, because it will become impossible for the injector to inject.

    5. Inspect and repair the cylinder that has an improper compensation value according to the following steps.


    NEXT

  2. INSPECT FUEL INJECTOR ASSEMBLY


    1. A01KIPZE03
      Text in Illustration
      *1 Injector
      *a Component Side
      *b Front View

      Disconnect the I9, I10, I11 and I12 fuel injector assembly connector.

    2. Measure the resistance of the fuel injector assembly.

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 0.42 to 0.52 Ω

    3. Reconnect the fuel injector assembly connector.


    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - INJECTOR DRIVER (EDU))


    1. Check the wire harness between the fuel injector assembly and EDU (INJ terminal).


      1. Disconnect the I9, I10, I11 and I12 fuel injector assemblies connectors.

      2. Disconnect the E9 and E14 EDU connectors.

      3. Check the resistance.

        Standard resistance (Check for open)
        Tester Connection Specified Condition
        I9-1 - E14-1 (INJ+#1) Below 1 Ω
        I10-1 - E14-6 (INJ+#2)
        I11-2 - E14-5 (INJ+#3)
        I12-2 - E9-5 (INJ+#4)
        I9-2 - E9-6 (INJ-#1)
        I10-2 - E9-4 (INJ-#2)
        I11-1 - E9-2 (INJ-#3)
        I12-1 - E9-3 (INJ-#4)
        Standard resistance (Check for short)
        Tester Connection Specified Condition
        I9-1 or E14-1 (INJ+#1) - Body ground 10 kΩ or higher
        I10-1 or E14-6 (INJ+#2) - Body ground
        I11-2 or E14-5 (INJ+#3) - Body ground
        I12-2 or E9-5 (INJ+#4) - Body ground
        I9-2 or E9-6 (INJ-#1) - Body ground
        I10-2 or E9-4 (INJ-#2) - Body ground
        I11-1 or E9-2 (INJ-#3) - Body ground
        I12-1 or E9-3 (INJ-#4) - Body ground

      4. Reconnect the fuel injector assemblies connectors.

      5. Reconnect the EDU connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER (EDU) - ECM)


    1. Disconnect the E15 EDU connector.

    2. Disconnect the E13 ECM connector.

    3. Check the resistance.

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      E15-4 (IJt#1) - E13-21 (#1) Below 1 Ω
      E15-8 (IJt#2) - E13-22 (#2)
      E15-7 (IJt#3) - E13-23 (#3)
      E15-3 (IJt#4) - E13-24 (#4)
      E15-1 (INJF) - E13-20 (INJF)
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      E15-4 (IJt#1) or E13-21 (#1) - Body ground 10 kΩ or higher
      E15-8 (IJt#2) or E13-22 (#2) - Body ground
      E15-7 (IJt#3) or E13-23 (#3) - Body ground
      E15-3 (IJt#4) or E13-24 (#4) - Body ground
      E15-1 (INJF) or E13-20 (INJF) - Body ground

    4. Reconnect the EDU connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK TERMINAL VOLTAGE (EDU POWER SOURCE)


    1. A01KIGME02
      Text in Illustration
      *1 EDU Connector
      *a Wire Harness Side
      *b Front view

      Disconnect the E14 EDU connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage of the wire harness side connector.

      Standard voltage
      Tester Connection Specified Condition
      E14-2 (+B) - E14-3 (GND) 11 to 14 V

    4. Reconnect the EDU connector.


    NG

    CHECK INJECTOR DRIVER POWER SOURCE CIRCUIT (BATTERY - EDU)

    OK

  6. INSPECT ECM TERMINAL VOLTAGE (INJECTOR VOLTAGE)


    1. A01KFA2E02
      Text in Illustration
      *1 ECM Connector

      While idling the engine, check the waveform of the ECM connectors using an oscilloscope.

      OK
      Tester Connection Specified Condition
      E13-21 (#1) - E10-1 (E1) Correct waveform is as shown
      E13-22 (#2) - E10-1 (E1) Correct waveform is as shown
      E13-23 (#3) - E10-1 (E1) Correct waveform is as shown
      E13-24 (#4) - E10-1 (E1) Correct waveform is as shown
      E13-20 (INJF) - E10-1 (E1) Correct waveform is as shown
      Tool Setting Condition
      (a) 5 V/DIV., 20 msec./DIV. Idling with warm engine
      (b) 2 V/DIV., 20 msec./DIV.

      Tech Tips

      The waveform varies depending on the injector injection.


    NG

    REPLACE ECM Click here

    OK

  7. REPLACE INJECTOR DRIVER (EDU)


    1. Replace the injector driver Click here.


    NEXT

  8. CHECK IF DTC OUTPUT RECURS (DTC P0200)

    Tech Tips

    After clearing the DTC, start the engine and let it idle for 30 seconds, and then confirm that DTC P0200 is not present again.


    NEXT

    END