ECD SYSTEM (w/o DPF), Diagnostic DTC:P0200

DTC Code DTC Name
P0200 Injector Circuit / Open

DESCRIPTION

The injector driver delivers drive signals to the injector assemblies using the DC/DC converter, which provides a high-voltage and quick-charging system.

Soon after the injector driver receives a fuel injection command (#1 to #4) signal from the ECM, the injector driver responds to the command with an injector injection confirmation (INJF) signal when the current is applied to the injector assembly.

A01BGMAE11
P0200
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Idling for 5 seconds Open or short in the injector driver or fuel injector circuit (1 trip detection logic).

  • Open or short in injector driver circuit

  • Injector assembly

  • Injector driver

  • ECM

MONITOR DESCRIPTION

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

The ECM continuously monitors both injection command (#1 to #4) signals and injection confirmation (INJF) signals. This DTC will be stored if the ECM determines that the number of #1 to #4 signals is inconsistent with the number of INJF signals.

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

After the engine is started, when there is no injection confirmation (INJF) signal sent from the injector driver to the ECM even though the ECM sends injection command (#1 to #4) signals to the injector driver, DTC P0200 is stored.

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

A01BA9CE14

WIRING DIAGRAM

A01BGUAE42
A01BA7SE02

INSPECTION PROCEDURE

Note


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

  • After replacing an injector assembly, the ECM needs registration Click here.

Tech Tips


  • When DTC P0200 is stored, the malfunctioning parts can be narrowed down according to fail-safe behavior.


    • When a DTC is stored but the engine does not stall, there may be an open circuit or malfunction in the following components which affect the control of individual cylinders.


      1. The circuit inside an injector assembly.

      2. The wiring between an injector driver and injector assembly (between terminal IJ1+ and the No. 1 injector assembly, terminal IJ1 and the No. 1 injector assembly, etc.).

      3. The wiring between an injector driver and the ECM (terminals #10 and #1, etc.).

    • When a DTC is stored and the engine stalls, there may be a malfunction in the wiring which affects the control of multiple cylinders.


      1. Wiring between an injector driver and the ECM (between INJF terminals).

      2. The power supply wiring.

  • 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. CHECK ENGINE CRANKING CONDITION


    1. Check the engine cranking condition.

      Result
      Result Proceed to
      Engine does not start*1 A
      Engine starts, but idling is rough*2 B
      Except above C

      Tech Tips


      • *1: Once DTC P0200 is cleared, it is not stored again even when the engine does not start due to a malfunction in the injector driver (EDU).

        When the engine cannot be started due to a malfunction in the injector driver (EDU), the value for "Common Rail Pressure" is higher than the value for "Target Common Rail Pressure"

      • *2: DTC P0200 is stored at this time.


    B

    READ VALUE USING GTS (INJECTION FEEDBACK VAL #1 to #4) Click here

    C

    CHECK INTERMITTENT PROBLEMS

    A

  2. INSPECT ECM


    1. A01BEG6E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to injector driver)

      Disconnect the injector driver (EDU) connectors.

    2. Check the waveform of the injector driver (EDU) connectors using an oscilloscope.

      OK
      Tester Connection Condition Specified Condition
      B51-4 (#10) - Body ground Cranking Correct waveform is as shown
      B51-8 (#20) - Body ground Cranking Correct waveform is as shown
      B51-7 (#30) - Body ground Cranking Correct waveform is as shown
      B51-3 (#40) - Body ground Cranking Correct waveform is as shown

    NG

    CHECK HARNESS AND CONNECTOR (EDU - ECM) Click here

    OK

  3. CHECK TERMINAL VOLTAGE INJECTOR DRIVER POWER SOURCE


    1. A01BFHSE15
      Text in Illustration
      *a

      Front view of wire harness connector

      (to injector driver)

      Disconnect the injector driver connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B49-2 (+B) - B49-3 (GND) Ignition switch ON 11 to 14 V

    3. Reconnect the injector driver connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

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


    1. Disconnect the injector driver connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      B51-4 (#10) - D98-50 (#1) Always Below 1 Ω
      B51-8 (#20) - D98-49 (#2) Always Below 1 Ω
      B51-7 (#30) - D98-48 (#3) Always Below 1 Ω
      B51-3 (#40) - D98-47 (#4) Always Below 1 Ω
      B51-5 (INJF) - D98-51 (INJF) Always Below 1 Ω
      B51-4 (#10) or D98-50 (#1) - Body ground Always 10 kΩ or higher
      B51-8 (#20) or D98-49 (#2) - Body ground Always 10 kΩ or higher
      B51-7 (#30) or D98-48 (#3) - Body ground Always 10 kΩ or higher
      B51-3 (#40) or D98-47 (#4) - Body ground Always 10 kΩ or higher
      B51-5 (INJF) or D98-51 (INJF) - Body ground Always 10 kΩ or higher

    4. Reconnect the injector driver connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  5. REPLACE INJECTOR DRIVER


    1. Replace the injector driver Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  6. READ VALUE USING GTS (INJECTION FEEDBACK VAL #1 to #4)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Injection Feedback Val #1 to #4.

    4. Start the engine.

    5. Read the Injection Feedback Val #1 to #4 values while idling the engine.

      Standard Value
      Item Engine Speed* Reference Value
      Injection Feedback Val #1 to #4 Idling

      3.0 mm3/st or less

      Tech Tips


      • *: The A/C switch and all accessory switches should be off, and the engine should be fully warmed up.

      • Fuel is not being injected in cylinders whose "Injection Feedback Val" is higher than 3.0 mm3/st. Inspection procedures beyond this point diagnose whether there are internal problems with fuel injectors, or whether there is a problem in the wiring of the fuel injector system.


    NEXT

  7. INSPECT INJECTOR DRIVER


    1. A01BD0DE11
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Injector assembly)

      Disconnect the injector assembly connectors for all cylinders.

    2. Start the engine.

    3. Check the waveform of the injector assembly connectors using an oscilloscope.

      OK
      Tester Connection Condition Specified Condition
      D24-1 - D24-2 Cranking Voltage increases by 50 V or more
      D25-1 - D25-2 Cranking Voltage increases by 50 V or more
      D26-1 - D26-2 Cranking Voltage increases by 50 V or more
      D27-1 - D27-2 Cranking Voltage increases by 50 V or more

    NG

    CHECK HARNESS AND CONNECTOR (INJECTOR ASSEMBLY - INJECTOR DRIVER) Click here

    OK

  8. REPLACE INJECTOR ASSEMBLY OF MALFUNCTIONING CYLINDER


    1. Replace the fuel injector of the malfunctioning cylinder Click here.


    NEXT

  9. BLEED AIR FROM FUEL SYSTEM


    1. Bleed the air from the fuel system Click here.


    NEXT

  10. REGISTER INJECTOR COMPENSATION CODE AND PERFORM PILOT QUANTITY LEARNING


    1. Register the injector compensation code Click here.

    2. Perform the injector pilot quantity learning Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  11. CHECK HARNESS AND CONNECTOR (EDU - ECM)


    1. Disconnect the injector driver connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      B51-4 (#10) - D98-50 (#1) Always Below 1 Ω
      B51-8 (#20) - D98-49 (#2) Always Below 1 Ω
      B51-7 (#30) - D98-48 (#3) Always Below 1 Ω
      B51-3 (#40) - D98-47 (#4) Always Below 1 Ω
      B51-5 (INJF) - D98-51 (INJF) Always Below 1 Ω
      B51-4 (#10) or D98-50 (#1) - Body ground Always 10 kΩ or higher
      B51-8 (#20) or D98-49 (#2) - Body ground Always 10 kΩ or higher
      B51-7 (#30) or D98-48 (#3) - Body ground Always 10 kΩ or higher
      B51-3 (#40) or D98-47 (#4) - Body ground Always 10 kΩ or higher
      B51-5 (INJF) or D98-51 (INJF) - Body ground Always 10 kΩ or higher

    4. Reconnect the injector driver connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  12. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  13. CHECK HARNESS AND CONNECTOR (INJECTOR ASSEMBLY - INJECTOR DRIVER)


    1. Disconnect the injector assembly connectors.

    2. Disconnect the injector driver connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D24-2 - B49-1 (IJ1+) Always Below 1 Ω
      D24-1 - B50-6 (IJ1-) Always Below 1 Ω
      D25-2 - B49-6 (IJ2+) Always Below 1 Ω
      D25-1 - B50-4 (IJ2-) Always Below 1 Ω
      D26-2 - B49-5 (IJ3+) Always Below 1 Ω
      D26-1 - B50-2 (IJ3-) Always Below 1 Ω
      D27-2 - B50-3 (IJ4+) Always Below 1 Ω
      D27-1 - B50-5 (IJ4-) Always Below 1 Ω
      D24-2 or B49-1 (IJ1+) - Body ground Always 10 kΩ or higher
      D24-1 or B50-6 (IJ1-) - Body ground Always 10 kΩ or higher
      D25-2 or B49-6 (IJ2+) - Body ground Always 10 kΩ or higher
      D25-1 or B50-4 (IJ2-) - Body ground Always 10 kΩ or higher
      D26-2 or B49-5 (IJ3+) - Body ground Always 10 kΩ or higher
      D26-1 or B50-2 (IJ3-) - Body ground Always 10 kΩ or higher
      D27-2 or B50-3 (IJ4+) - Body ground Always 10 kΩ or higher
      D27-1 or B50-5 (IJ4-) - Body ground Always 10 kΩ or higher

    4. Reconnect the injector assembly connectors.

    5. Reconnect the injector driver connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  14. REPLACE INJECTOR DRIVER


    1. Replace the injector driver Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  15. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

  16. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch off for 30 seconds or more.

    4. Start the engine and idle it for 10 seconds.

    5. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    6. Confirm that the DTC is not output again.


    NEXT

    END