ECD SYSTEM (w/ DPF), Diagnostic DTC:P0201, P0202, P0203, P0204, P062D

DTC Code DTC Name
P0201 Injector Circuit / Open - (Cylinder 1)
P0202 Injector Circuit / Open - (Cylinder 2)
P0203 Injector Circuit / Open - (Cylinder 3)
P0204 Injector Circuit / Open - (Cylinder 4)
P062D No. 1 Fuel Injector Driver Circuit Performance

DESCRIPTION

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

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

B007VDIE31
P0201, P0202, P0203, P0204:
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Idling for 5 seconds

Open or short in injector circuit occurs a certain number of times (a maximum of approx. 0.5 seconds).

(1 trip detection logic)

  • Open or short in injector driver circuit

  • Injector assembly

  • Injector driver

  • ECM
P062D
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Idling for 5 seconds

Inconsistency in the injection waveforms between the injector driver and ECM while the engine is running a certain number of times (a maximum of approx. 0.5 seconds).

(1 trip detection logic)

  • Open or short in injector driver circuit

  • Injector assembly

  • Injector driver

  • ECM

MONITOR DESCRIPTION

P0201, P0202, P0203, P0204:

The ECM compares injection command (# 1 to #4) signals and injection confirmation (INJF) signals for each cylinder. If the ECM determines that a cylinder has a malfunction, DTC P0201, P0202, P0203 or P0204 will be stored.

P062D:

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 and INJF signals are inconsistent.

The fuel injectors are grounded over a Field Effect Transistor (FET) and a serial resistor. This resistor creates a voltage drop, which is monitored by the injector driver (EDU) (injector drive circuit) in relation to the current drawn by the injector assembly. 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.

After the engine is started, when there is no injection confirmation (INJF) signal from the injector driver (EDU) to the ECM even though the ECM sends injection command (#1 to #4) signals to the injector driver (EDU), DTC P062D is stored.

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

B007PDWE14

WIRING DIAGRAM

B007V6IE43
B007WDZE03

INSPECTION PROCEDURE

CAUTION:

Make sure to perform work on high voltage circuits with the ignition switch off.

Note


  • Inspect the fuses of circuits related to this system before performing the following inspection procedure.

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

  • After replacing the fuel supply pump assembly, the ECM needs initialization Click here.

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

Tech Tips

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 P062D 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 P0201, P0202, P0203, P0204 and P062D are stored at this time.


    B

    CHECK WHETHER DTC OUTPUT RECURS Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  2. INSPECT ECM


    1. B007OMEE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Injector Driver (EDU))

      Check the waveform of the ECM connectors using an oscilloscope.

      OK
      Tester Connection Condition Specified Condition
      D62-7 (#10) - Body ground Cranking Correct waveform is as shown
      D62-3 (#20) - Body ground Cranking Correct waveform is as shown
      D62-6 (#30) - Body ground Cranking Correct waveform is as shown
      D62-4 (#40) - Body ground Cranking Correct waveform is as shown

    NG

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

    OK

  3. CHECK TERMINAL VOLTAGE INJECTOR DRIVER POWER SOURCE


    1. B007SPBE19
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Injector Driver)

      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
      B60-2 (+B) - B60-4 (GND) Ignition switch ON 11 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
      B62-7 (#10) - D99-50 (#1) Always Below 1 Ω
      B62-3 (#20) - D99-49 (#2) Always Below 1 Ω
      B62-6 (#30) - D99-48 (#3) Always Below 1 Ω
      B62-4 (#40) - D99-47 (#4) Always Below 1 Ω
      B62-8 (INJF) - D99-51 (INJF) Always Below 1 Ω
      B62-7 (#10) or D99-50 (#1) - Body ground Always 10 kΩ or higher
      B62-3 (#20) or D99-49 (#2) - Body ground Always 10 kΩ or higher
      B62-6 (#30) or D99-48 (#3) - Body ground Always 10 kΩ or higher
      B62-4 (#40) or D99-47 (#4) - Body ground Always 10 kΩ or higher
      B62-8 (INJF) or D99-51 (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. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off for 30 seconds.

    5. Start the engine and idle it for 30 seconds.

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

    7. Check the DTCs output on the GTS.

      Tech Tips


      • The cylinder with the malfunctioning injector assembly can be determined based on the output DTCs.

      • If the DTC P0201 is output, check the No. 1 injector assembly circuit.

      • If the DTC P0202 is output, check the No. 2 injector assembly circuit.

      • If the DTC P0203 is output, check the No. 3 injector assembly circuit.

      • If the DTC P0204 is output, check the No. 4 injector assembly circuit.


    NEXT

  7. INSPECT INJECTOR DRIVER


    1. B007V1XE24
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel 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
      D81-1 - D81-2 Cranking Voltage increases by 50 V or more
      D82-1 - D82-2 Cranking Voltage increases by 50 V or more
      D83-1 - D83-2 Cranking Voltage increases by 50 V or more
      D84-1 - D84-2 Cranking Voltage increases by 50 V or more

    NG

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

    OK

  8. REPLACE INJECTOR ASSEMBLY (RELEVANT CYLINDER)


    1. Replace the injector assembly of the cylinder relevant to the DTC 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

  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 fuel injector pilot quantity learning Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  11. 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
      B62-7 (#10) - D99-50 (#1) Always Below 1 Ω
      B62-3 (#20) - D99-49 (#2) Always Below 1 Ω
      B62-6 (#30) - D99-48 (#3) Always Below 1 Ω
      B62-4 (#40) - D99-47 (#4) Always Below 1 Ω
      B62-8 (INJF) - D99-51 (INJF) Always Below 1 Ω
      B62-7 (#10) or D99-50 (#1) - Body ground Always 10 kΩ or higher
      B62-3 (#20) or D99-49 (#2) - Body ground Always 10 kΩ or higher
      B62-6 (#30) or D99-48 (#3) - Body ground Always 10 kΩ or higher
      B62-4 (#40) or D99-47 (#4) - Body ground Always 10 kΩ or higher
      B62-8 (INJF) or D99-51 (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
      D81-1 - B61-1 (IJ1+) Always Below 1 Ω
      D81-2 - B61-4 (IJ1-) Always Below 1 Ω
      D82-1 - B61-3 (IJ2+) Always Below 1 Ω
      D82-2 - B61-6 (IJ2-) Always Below 1 Ω
      D83-1 - B60-1 (IJ3+) Always Below 1 Ω
      D83-2 - B60-3 (IJ3-) Always Below 1 Ω
      D84-1 - B61-2 (IJ4+) Always Below 1 Ω
      D84-2 - B61-5 (IJ4-) Always Below 1 Ω
      D81-1 or B61-1 (IJ1+) - Body ground Always 10 kΩ or higher
      D81-2 or B61-4 (IJ1-) - Body ground Always 10 kΩ or higher
      D82-1 or B61-3 (IJ2+) - Body ground Always 10 kΩ or higher
      D82-2 or B61-6 (IJ2-) - Body ground Always 10 kΩ or higher
      D83-1 or B60-1 (IJ3+) - Body ground Always 10 kΩ or higher
      D83-2 or B60-3 (IJ3-) - Body ground Always 10 kΩ or higher
      D84-1 or B61-2 (IJ4+) - Body ground Always 10 kΩ or higher
      D84-2 or B61-5 (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