ECD SYSTEM, 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 assemblies are installed in the cylinder head and inject fuel into the cylinders based on the signals from the ECM.

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

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

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

ECM internal error

(1 trip detection logic)

 ECM

WIRING DIAGRAM

B007W5AE02
B007RBHE01

INSPECTION PROCEDURE

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 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 DTC OUTPUT


    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 / Trouble Codes.

    4. Read the DTCs.

      Result
      Result Proceed to
      DTC P0201, P0202, P0203 or P0204 is output A
      DTC P062D is output B

    A

    CHECK WHETHER DTC OUTPUT RECURS Click here

    B

  2. INSPECT EDU RELAY


    1. Inspect the EDU relay Click here.


    NG

    REPLACE EDU RELAY Click here

    OK

  3. REPAIR OR REPLACE HARNESS AND CONNECTOR


    1. Disconnect the EDU relay.

    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
      D134-17 (+BD1) - EDU relay terminal 5 Always Below 1 Ω
      D134-16 (+BD2) - EDU relay terminal 5 Always Below 1 Ω
      EDU relay terminal 3 - positive (+) battery terminal Always Below 1 Ω
      D134-17 (+BD1) - EDU relay terminal 5 - Body ground Always 10 kΩ or higher
      D134-16 (+BD2) - EDU relay terminal 5 - Body ground Always 10 kΩ or higher
      EDU relay terminal 3 - positive (+) battery terminal - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  4. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  5. REPLACE EDU RELAY


    1. Replace the EDU relay.


    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 5 seconds or more.

    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 ECM (INJECTION SIGNAL)


    1. 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. Start the engine.

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

      B007P7AE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (Injector Assembly)

      		 *b No. 1 injector assembly connector
      *c No. 2 injector assembly connector *d No. 3 injector assembly connector
      *e No. 4 injector assembly connector - -
      OK
      Tester Connection Condition Specified Condition
      D81-1 - D81-2 Cranking Correct waveform is as shown
      D82-1 - D82-2 Cranking Correct waveform is as shown
      D83-1 - D83-2 Cranking Correct waveform is as shown
      D84-1 - D84-2 Cranking Correct waveform is as shown

    4. Reconnect the injector assembly connectors for all cylinders.


    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR Click here

    OK

  8. INSPECT INJECTOR ASSEMBLY (RESISTANCE)


    1. Inspect the injector assembly of the cylinder relevant to the DTC Click here.


    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  9. 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 No. 1 injection pipe sub-assembly and a new No. 2 injection pipe sub-assembly.

      • Follow the procedure in the repair manual and temporarily install the No. 1 injection pipe sub-assembly, No. 2 injection pipe sub-assembly and No. 1 nozzle leakage pipe assembly 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 sub-assembly 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 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

  12. REPAIR OR REPLACE HARNESS AND CONNECTOR


    1. Disconnect the injector assemblies.

    2. Disconnect the ECM connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D134-57 (#1D+) - D134-58 (#1D-) Always Below 1 Ω
      D134-25 (#2D+) - D134-26 (#2D-) Always Below 1 Ω
      D134-55 (#3D+) - D134-56 (#3D-) Always Below 1 Ω
      D134-27 (#4D+) - D134-28 (#4D-) Always Below 1 Ω
      D134-57 (#1D+) - D134-58 (#1D-) - Body ground and other terminals Always 10 kΩ or higher
      D134-25 (#2D+) - D134-26 (#2D-) - Body ground and other terminals Always 10 kΩ or higher
      D134-55 (#3D+) - D134-56 (#3D-) - Body ground and other terminals Always 10 kΩ or higher
      D134-27 (#4D+) - D134-28 (#4D-) - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the injector assembly connectors for all cylinders.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  13. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  14. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

  15. 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 5 seconds or more.

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

    6. Confirm that the DTC is not output again.


    NEXT

    END