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

DTC Code DTC Name
P0200 Injector Circuit / Open

DESCRIPTION

Tech Tips


  • For more information on the injector driver (EDU) Click here.

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

The EDU drives the injectors at high speed. The EDU has realized high-speed driving under high-pressure fuel conditions using the DC/DC converter, which provides a high voltage and the 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 injector.

A01DZMYE01
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 injector driver (EDU) circuit

  • Injector

  • EDU

  • ECM

MONITOR DESCRIPTION

P0200 (Open or short in injector driver (EDU) or injector circuit):

The ECM continuously monitors both injection command (IJT) signals and injection confirmation (IJF) signal. This DTC will be set if the ECM judges that the number of IJT signals and IJF signals are inconsistent.

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

P0200 refers to a malfunction of injector drive circuit or injector circuit.

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

A01E23BE02
PULSE GENERATION INSPECTION

Tech Tips

The problem area can be identified by checking the waveform at the following terminals.

A01DWDTE01

Tech Tips

A and D are on the ECM side, and B and C are on the EDU side.

Malfunction Point Trouble Area
A
  • ECM

B (If A is normal)
  • Open or short in "#1 to #4 (ECM)" - "#10 to #40 (EDU)" harness or connector

C (If A and B are normal)
  • Open or short in "IJ1+ to IJ4+ (EDU)" - "IJ1- to IJ4- (EDU)" circuit

  • Injector

  • EDU

D (If A, B and C are normal)
  • Open or short in "INJF (EDU)" - "INJF (ECM)" circuit (P1271 is set simultaneously)


  1. A01E2HSE01

    Reference: Inspection using the oscilloscope.

    During idling, the correct waveform is as shown in the diagram.

    Inspection Point Specified Condition
    A and B Correct waveform is as shown
  2. A01E2IBE01

    Reference: Inspection using the oscilloscope.

    During idling, the correct waveform is as shown in the diagram.

    Inspection Point Specified Condition
    C and D Correct waveform is as shown

MONITOR STRATEGY

Required sensor INJF signal from EDU
Frequency of operation Continuous
Duration 10 seconds
MIL operation 1 driving cycle

TYPICAL ENABLING CONDITIONS

Item Specification
Minimum Maximum
Engine speed 500 rpm -
Battery voltage 11 V -
Ignition switch ON ON

TYPICAL MALFUNCTION THRESHOLDS

Threshold

Injection missing counter* for all cylinders, or for one individual cylinder, reaches specified number (taking approximately 1 second from starting engine)

*: Increases when no IJF signal is received from the EDU despite the ECM sending the IJT signals.

WIRING DIAGRAM

A01E150E06
A01E14PE02

INSPECTION PROCEDURE

Note

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

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 the injectors and pressure discharge valve.

  • Read freeze frame data using the intelligent tester. 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 INJECTOR ASSEMBLY


    1. A01DZRDE04

      Disconnect the F5, F6, F7 and F8 injector connectors.

    2. Measure the resistance of the injection assembly.

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

    NG
    OK
  2. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER [EDU] - INJECTOR ASSEMBLY)


    1. Check the harness and connector between the injector and EDU (INJ terminal).


      1. Disconnect the F5, F6, F7 and/or F8 injector connectors.

        A01DVZKE01
      2. Disconnect the I17 and/or I18 EDU connectors.

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

        Standard resistance (Check for open)
        Tester Connection Specified Condition
        F5-1 - IJ1+ (I17-1) Below 1 Ω
        F6-1 - IJ2+ (I17-6)
        F7-1 - IJ3+ (I17-5)
        F8-1 - IJ4+ (I18-3)
        F5-2 - IJ1- (I18-6)
        F6-2 - IJ2- (I18-4)
        F7-2 - IJ3- (I18-2)
        F8-2 - IJ4- (I18-5)
        Standard resistance (Check for short)
        Tester Connection Specified Condition
        F5-1 or IJ1+ (I17-1) - Body ground 10 kΩ or higher
        F6-1 or IJ2+ (I17-6) - Body ground
        F7-1 or IJ3+ (I17-5) - Body ground
        F8-1 or IJ4+ (I18-3) - Body ground
        F5-2 or IJ1- (I18-6) - Body ground
        F6-2 or IJ2- (I18-4) - Body ground
        F7-2 or IJ3- (I18-2) - Body ground
        F8-2 or IJ4- (I18-5) - Body ground

    NG
    OK
  3. CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER [EDU] - ECM)


    1. A01E1Y1E01

      Disconnect the I19 EDU connector.

    2. Disconnect the E8 ECM connector.

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

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      #10 (I19-4) - #1 (E8-24) Below 1 Ω
      #20 (I19-8) - #2 (E8-23)
      #30 (I19-7) - #3 (E8-22)
      #40 (I19-3) - #4 (E8-21)
      IJNF (I19-5) - INJF (E8-25)
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      #10 (I19-4) or #1 (E8-24) - Body ground 10 kΩ or higher
      #20 (I19-8) or #2 (E8-23) - Body ground
      #30 (I19-7) or #3 (E8-22) - Body ground
      #40 (I19-3) or #4 (E8-21) - Body ground
      IJNF (I19-5) or INJF (E8-25) - Body ground

    NG
    OK
  4. INSPECT INJECTOR DRIVER (EDU) (BATTERY VOLTAGE)


    1. A01DX1JE01

      Disconnect the I17 EDU connector.

    2. Turn the ignition switch ON.

    3. Measure the voltage of the EDU connector.

      Standard voltage
      Tester Connection Specified Condition
      +B (I17-2) - GND (I17-3) 11 to 14 V

    NG
    OK
  5. REPLACE INJECTOR DRIVER (EDU)


    1. Replace injector driver Click here.


    NEXT
  6. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON.

    3. Turn the tester ON.

    4. Clear DTCs Click here.

    5. Start the engine.

    6. Allow the engine to idle for 30 seconds or more.

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

    8. Read the DTCs.

      Result
      Display (DTC Output) Proceed to
      No output A
      P0200 B

      Tech Tips

      If the engine does not stat, replace the ECM.


    B
    A