ECD SYSTEM, Diagnostic DTC:P0201,P0202,P0203,P0204 and 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 assemblies using the DC/DC converter, which provides a high voltage and quick-charging system.

Soon after the injector driver (EDU) receives a fuel 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.

A210270E21

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0201

Injector Circuit / Open - (Cylinder 1)

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 assembly circuit

  • Injector assembly

  • Injector driver (EDU)

  • ECM

Comes on

DTC stored

P0202

Injector Circuit / Open - (Cylinder 2)

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 assembly circuit

  • Injector assembly

  • Injector driver (EDU)

  • ECM

Comes on

DTC stored

P0203

Injector Circuit / Open - (Cylinder 3)

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 assembly circuit

  • Injector assembly

  • Injector driver (EDU)

  • ECM

Comes on

DTC stored

P0204

Injector Circuit / Open - (Cylinder 4)

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 assembly circuit

  • Injector assembly

  • Injector driver (EDU)

  • ECM

Comes on

DTC stored

P062D

No. 1 Fuel Injector Driver Circuit Performance

Inconsistency in the injection waveforms between the injector driver (EDU) 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 (EDU) circuit

  • Injector assembly

  • Injector driver (EDU)

  • ECM

Comes on

DTC stored

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 injector assemblies 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 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 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.

A145849E11

CONFIRMATION DRIVING PATTERN

DTC No.

DTC Detection Drive Pattern

P0201

Idling for 5 seconds

P0202

P0203

P0204

P062D

WIRING DIAGRAM

A294524E01
A294525E01

CAUTION / NOTICE / HINT

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 procedure.

  • 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

Tip:

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
      Tip:

      • *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 "Fuel Press" 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 RECURSClick here

    C

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    A

  2. INSPECT ECM

    1. A294526C03

      *a

      Front view of wire harness connector

      (to Injector Driver (EDU))

      Disconnect the injector driver (EDU) connector.

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

      OK

      Tester Connection

      Condition

      Specified Condition

      B159-7 (#10)- Body ground

      Cranking

      Correct waveform is as shown

      B159-3 (#20) - Body ground

      Cranking

      Correct waveform is as shown

      B159-6 (#30) - Body ground

      Cranking

      Correct waveform is as shown

      B159-4 (#40) - Body ground

      Cranking

      Correct waveform is as shown

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF INJECTOR DRIVER (EDU))

    1. A204910C03

      *a

      Front view of wire harness connector

      (to Injector Driver (EDU))

      Disconnect the injector driver (EDU) connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      B157-2 (+B) - B157-4 (GND)

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK INJECTOR CIRCUITClick here

    OK

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

    1. Disconnect the injector driver (EDU) 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

      B159-7 (#10) - B164-50 (#1)

      Always

      Below 1 Ω

      B159-3 (#20) - B164-49 (#2)

      Always

      Below 1 Ω

      B159-6 (#30) - B164-48 (#3)

      Always

      Below 1 Ω

      B159-4 (#40) - B164-47 (#4)

      Always

      Below 1 Ω

      B159-8 (INJF) - B164-51 (INJF)

      Always

      Below 1 Ω

      B159-7 (#10) or B164-50 (#1) - Body ground

      Always

      10 kΩ or higher

      B159-3 (#20) or B164-49 (#2) - Body ground

      Always

      10 kΩ or higher

      B159-6 (#30) or B164-48 (#3) - Body ground

      Always

      10 kΩ or higher

      B159-4 (#40) or B164-47 (#4) - Body ground

      Always

      10 kΩ or higher

      B159-8 (INJF) or B164-51 (INJF) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  5. REPLACE INJECTOR DRIVER (EDU)

    1. Replace the injector driver (EDU).

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  6. CHECK INJECTOR CIRCUIT

    1. Check the injector circuit.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

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

    1. Disconnect the injector driver (EDU) 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

      B159-7 (#10) - B164-50 (#1)

      Always

      Below 1 Ω

      B159-3 (#20) - B164-49 (#2)

      Always

      Below 1 Ω

      B159-6 (#30) - B164-48 (#3)

      Always

      Below 1 Ω

      B159-4 (#40) - B164-47 (#4)

      Always

      Below 1 Ω

      B159-8 (INJF) - B164-51 (INJF)

      Always

      Below 1 Ω

      B159-7 (#10) or B164-50 (#1) - Body ground

      Always

      10 kΩ or higher

      B159-3 (#20) or B164-49 (#2) - Body ground

      Always

      10 kΩ or higher

      B159-6 (#30) or B164-48 (#3) - Body ground

      Always

      10 kΩ or higher

      B159-4 (#40) or B164-47 (#4) - Body ground

      Always

      10 kΩ or higher

      B159-8 (INJF) or B164-51 (INJF) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  8. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  9. 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.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off for 30 seconds.

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

    6. Turn the GTS on.

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

    8. Check the DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Tip:

      • 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.

    Result

    Proceed to

    NEXT
    NEXT

  10. INSPECT INJECTOR DRIVER (EDU)

    1. A294527C02

      *a

      Front view of wire harness connector

      (to Injector Assembly)

      Disconnect the injector assembly connectors for all cylinders.

      Note:

      If only the injector assembly connector of the malfunctioning cylinder is disconnected, the engine will start and there will be rough idling. Therefore, disconnect all injector assembly connectors before inspecting the waveform.

    2. Check the waveform of the injector assembly connectors using an oscilloscope while cranking the engine.

      OK

      Tester Connection

      Condition

      Specified Condition

      B141-1 - B141-2

      Cranking

      Voltage increases by 50 V or higher

      B142-1 - B142-2

      Cranking

      Voltage increases by 50 V or higher

      B143-1 - B143-2

      Cranking

      Voltage increases by 50 V or higher

      B144-1 - B144-2

      Cranking

      Voltage increases by 50 V or higher

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

  11. REPLACE INJECTOR ASSEMBLY (RELEVANT CYLINDER)

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

      Click hereClick 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.

    Result

    Proceed to

    NEXT
    NEXT

  12. BLEED AIR FROM FUEL SYSTEM

    1. Bleed the air from the fuel system.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  13. REGISTER INJECTOR COMPENSATION CODE AND PERFORM PILOT QUANTITY LEARNING

    1. Register the injector compensation codes.

      Click here

    2. Perform the pilot quantity learning.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

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

    1. Disconnect the injector assembly connectors.

    2. Disconnect the injector driver (EDU) connectors.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B141-1 - B158-1 (IJ1+)

      Always

      Below 1 Ω

      B141-2 - B158-4 (IJ1-)

      Always

      Below 1 Ω

      B142-1 - B158-3 (IJ2+)

      Always

      Below 1 Ω

      B142-2 - B158-6 (IJ2-)

      Always

      Below 1 Ω

      B143-1 - B157-1 (IJ3+)

      Always

      Below 1 Ω

      B143-2 - B157-3 (IJ3-)

      Always

      Below 1 Ω

      B144-1 - B158-2 (IJ4+)

      Always

      Below 1 Ω

      B144-2 - B158-5 (IJ4-)

      Always

      Below 1 Ω

      B141-1 or B158-1 (IJ1+) - Body ground

      Always

      Below 1 Ω

      B141-2 or B158-4 (IJ1-) - Body ground

      Always

      10 kΩ or higher

      B142-1 or B158-3 (IJ2+) - Body ground

      Always

      10 kΩ or higher

      B142-2 or B158-6 (IJ2-) - Body ground

      Always

      10 kΩ or higher

      B143-1 or B157-1 (IJ3+) - Body ground

      Always

      10 kΩ or higher

      B143-2 or B157-3 (IJ3-) - Body ground

      Always

      10 kΩ or higher

      B144-1 or B158-2 (IJ4+) - Body ground

      Always

      10 kΩ or higher

      B144-2 or B158-5 (IJ4-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  15. REPLACE INJECTOR DRIVER (EDU)

    1. Replace the injector driver (EDU).

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  16. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    Result

    Proceed to

    NEXT
    NEXT

  17. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the ignition switch off and wait for 30 seconds or more.

    6. Start the engine and idle it for 5 seconds or more.

    7. Turn the GTS on.

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

    9. Confirm that the DTC is not output.

      Powertrain > Engine and ECT > Trouble Codes

    Result

    Proceed to

    NEXT
    NEXT

    END