ECD SYSTEM, Diagnostic DTC:P0200

DTC Code DTC Name
P0200 Injector Circuit / Open

DESCRIPTION

The EDU drives the injectors at high speeds. The EDU delivers high-speed driving under highly-pressurized fuel conditions using the DC/DC converter, which provides a high-voltage and quick-charging system.

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

A003CLVE11
P0200
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Idling for 5 seconds

Open or short in EDU or injector circuit

After engine is started, there is no INJF signal from EDU to ECM, despite ECM sending #1 to #4 signal to EDU

(1 trip detection logic)

  • Open or short in EDU circuit

  • Injector

  • EDU

  • ECM

Tech Tips

DTC P0200 is detected when start the engine and let it idle for 30 seconds.

MONITOR DESCRIPTION

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

The ECM continuously monitors both injection command (#1 to #4) signals and injection confirmation (INJF) signal. This DTC will be set if the ECM judges that the number of #1 to #4 signals and INJF 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 (injector drive circuit), in relation to the current drawn by the injector. When the injector 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.

P0200/97 refers to a malfunction in the EDU or injector circuit.

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

A003D5XE13

MONITOR STRATEGY

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

TYPICAL ENABLING CONDITIONS

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

TYPICAL MALFUNCTION THRESHOLDS

Threshold

The injection missing counter* for all the cylinders, or for one individual cylinder, reaches a specified number (taking approximately 1 second after starting the engine)

*: Increments when no INJF signal is received from the EDU despite the ECM sending #1 to #4 signals

WIRING DIAGRAM

A003B7AE01
A003ESCE01

INSPECTION PROCEDURE

Note


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

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

Tech Tips

Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

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. CHECK ECM


    1. Disconnect the injector driver (EDU) connector.

    2. A003BF7E01

      Check the waveform of the injector driver (EDU) connectors using an oscilloscope while cranking the engine.

      OK
      Tester Connection Condition Specified Condition
      B15-6 (#10) - B15-1 (GND) Cranking Correct waveform is as shown
      B15-3 (#20) - B15-1 (GND) Cranking Correct waveform is as shown
      B15-2 (#30) - B15-1 (GND) Cranking Correct waveform is as shown
      B15-5 (#40) - B15-1 (GND) Cranking Correct waveform is as shown
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Injector Driver (EDU))

    3. Reconnect the injector driver connectors.


    NG

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

    OK

  3. CHECK TERMINAL VOLTAGE INJECTOR DRIVER POWER SOURCE


    1. A003I1ME12
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Injector Driver (EDU))

      Disconnect the injector driver connectors.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B13-8 (+B) - B15-1 (GND) Ignition switch ON 9 to 14 V

    3. Reconnect the injector driver connectors.


    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
      Tester Connection Condition Specified Condition
      B15-6 (#10) - D105-50 (#1) Always Below 1 Ω
      B15-3 (#20) - D105-49 (#2) Always Below 1 Ω
      B15-2 (#30) - D105-48 (#3) Always Below 1 Ω
      B15-5 (#40) - D105-47 (#4) Always Below 1 Ω
      B15-7 (INJF) - D105-51 (INJF) Always Below 1 Ω
      B15-6 (#10) or D105-50 (#1) - Body ground Always 10 kΩ or higher
      B15-3 (#20) or D105-49 (#2) - Body ground Always 10 kΩ or higher
      B15-2 (#30) or D105-48 (#3) - Body ground Always 10 kΩ or higher
      B15-5 (#40) or D105-47 (#4) - Body ground Always 10 kΩ or higher
      B15-7 (INJF) or D105-51 (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 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 ASSEMBLY (RESISTANCE)


    1. A003I5OE09
      Text in Illustration
      *a

      Component with harness connected

      (Fuel injector)

      Disconnect the fuel injector connectors.

    2. Measure the resistance of the fuel injector

      OK
      No open or short circuit malfunction.

    3. Reconnect the fuel injector connectors.


    NG

    REPLACE INJECTOR ASSEMBLY OF MALFUNCTIONING CYLINDER Click here

    OK

  8. INSPECT INJECTOR DRIVER


    1. A003FFBE11
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel injector)

      Disconnect the fuel injector connectors for all cylinders.

    2. Check the waveform of the fuel injector 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

  9. REPLACE INJECTOR ASSEMBLY OF MALFUNCTIONING CYLINDER


    1. Replace the injector assembly Click here.

      Note


      • When replacing the injector assembly for a cylinder, always be sure to use a new injection pipe.

      • Follow the procedure in the repair manual and temporarily install the injection pipes and nozzle leakage pipe, and then correctly position the injector assemblies. After that, tighten parts according to the torque specifications.

      • If the installation procedure is not performed correctly, injector assemblies may become out of position, which may cause the injector assemblies to deteriorate, resulting in malfunctions.

      • If an injector assembly deteriorates and malfunctions, other problems such as knocking, rough idle, etc. may occur.

      • If an injector assembly becomes out of position, it is possible that the seal between the injector assembly and injection pipe may become incomplete, resulting in a fuel leak.


    NEXT

  10. BLEED AIR FROM FUEL SYSTEM


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


    NEXT

  11. REGISTER INJECTOR COMPENSATION CODE


    1. Register the injector compensation code Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  12. 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
      Tester Connection Condition Specified Condition
      B15-6 (#10) - D105-50 (#1) Always Below 1 Ω
      B15-3 (#20) - D105-49 (#2) Always Below 1 Ω
      B15-2 (#30) - D105-48 (#3) Always Below 1 Ω
      B15-5 (#40) - D105-47 (#4) Always Below 1 Ω
      B15-7 (INJF) - D105-51 (INJF) Always Below 1 Ω
      B15-6 (#10) or D105-50 (#1) - Body ground Always 10 kΩ or higher
      B15-3 (#20) or D105-49 (#2) - Body ground Always 10 kΩ or higher
      B15-2 (#30) or D105-48 (#3) - Body ground Always 10 kΩ or higher
      B15-5 (#40) or D105-47 (#4) - Body ground Always 10 kΩ or higher
      B15-7 (INJF) or D105-51 (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

  13. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

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


    1. A003GX5E18
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Injector assembly)
      *b

      Front view of wire harness connector

      (to Injector driver)

      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 - B13-4 (INJ1) Always Below 1 Ω
      D25-2 - B13-2 (INJ2) Always Below 1 Ω
      D26-2 - B13-1 (INJ3) Always Below 1 Ω
      D27-2 - B13-3 (INJ4) Always Below 1 Ω
      D24-1 - B13-5 (COM1) Always Below 1 Ω
      D25-1 - B13-6 (COM2) Always Below 1 Ω
      D26-1 - B13-6 (COM2) Always Below 1 Ω
      D27-1 - B13-5 (COM1) Always Below 1 Ω
      D24-2 or B13-4 (INJ1) - Body ground Always 10 kΩ or higher
      D25-2 or B13-2 (INJ2) - Body ground Always 10 kΩ or higher
      D26-2 or B13-1 (INJ3) - Body ground Always 10 kΩ or higher
      D27-2 or B13-3 (INJ4) - Body ground Always 10 kΩ or higher
      D24-1 or B13-5 (COM1) - Body ground Always 10 kΩ or higher
      D25-1 or B13-6 (COM2) - Body ground Always 10 kΩ or higher
      D26-1 or B13-6 (COM2) - Body ground Always 10 kΩ or higher
      D27-1 or B13-5 (COM1) - 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

  15. REPLACE INJECTOR DRIVER


    1. Replace the injector driver Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  16. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

  17. 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