ECD SYSTEM(w/ Urea SCR System), Diagnostic DTC:P052F, P0683

DTC Code DTC Name
P052F Glow Plug Control Module System Voltage
P0683 Glow Plug Control Module to PCM Communication Circuit

DESCRIPTION

The glow system consists of the glow plug controller, glow plugs and ECM. The glow plug controller turns on the glow plug of each cylinder according to the duty command signal from the ECM in order to maintain optimal engine temperatures. The glow plugs can be controlled according to the engine coolant temperature at engine start by using duty signals. This helps induce ignition under low temperatures and prevent rough idle after starting the engine.

The glow plug controller contains a self-diagnosis function. When the glow plug controller detects an internal malfunction, it sends a signal indicating the malfunction to the ECM. When the ECM receives this signal, it illuminates the MIL and stores a DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P052F Glow Plug Control Module System Voltage The glow plug controller recognizes the battery voltage as being 18.4 V or higher 3 times or more when the glow plugs are on (2 trip detection logic). Glow plug controller Comes on DTC stored
P0683 Glow Plug Control Module to PCM Communication Circuit When the glow plugs are on, the ECM detects that there is no output from the glow plug control unit for 3 seconds even though the ECM outputs an SI signal ("ON" command signal) (2 trip detection logic).

  • Open or short circuit in ground wire

  • Open or short circuit in battery wire

  • Open in SI wire

  • SI wire short circuit to ground or battery

  • Open in DI wire

  • DI wire short circuit to ground or battery

  • Low battery voltage

  • Glow plug controller

  • ECM

 Comes on DTC stored

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern

P052F

P0683

 Enter check mode

WIRING DIAGRAM

B0028D7E15

CAUTION / NOTICE / HINT

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.

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 / Trouble Codes.

    4. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P0683 is output A
      DTC P052F is output B

    B

    REPLACE GLOW PLUG CONTROLLER Click here

    A

  2. CHECK GLOW PLUG CONTROLLER (POWER SOURCE CIRCUIT)


    1. B002808C14
      *a

      Front view of wire harness connector

      (to Glow Plug Controller)

      Disconnect the glow plug controller connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C99-4 (+B) - Body ground Ignition switch ON 11 to 14 V
      C99-4 (+B) - Body ground Ignition switch off Below 0.5 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - BODY GROUND)


    1. Disconnect the glow plug controller connector.

    2. B002808C15
      *a

      Front view of wire harness connector

      (to Glow Plug Controller)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C99-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 11 Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - ECM)


    1. Disconnect the glow plug controller 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
      C99-3 (SI) - C58-11 (GLDO) Always Below 1 Ω
      C99-5 (DI) - C58-10 (GLDI) Always Below 1 Ω
      C99-3 (SI) or C58-11 (GLDO) - Body ground and other terminals Always 10 kΩ or higher
      C99-5 (DI) or C58-10 (GLDI) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 11 Click here

    OK

  5. REPLACE GLOW PLUG CONTROLLER


    1. Replace the glow plug controller.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

    4. Turn the ignition switch to ON.

    5. Turn the GTS on.

    6. Using the GTS, switch the ECM from normal mode to check mode.


      Powertrain > Engine > Utility
      Tester Display
      Check Mode

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

    8. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      OK
      No DTC is output.

      Tech Tips

      Check for DTCs in check mode.

      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

  7. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  8. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

    4. Turn the ignition switch to ON.

    5. Turn the GTS on.

    6. Using the GTS, switch the ECM from normal mode to check mode.


      Powertrain > Engine > Utility
      Tester Display
      Check Mode

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

    8. Confirm that the DTC is not output again.


      Powertrain > Engine > Trouble Codes

      Tech Tips

      Check for DTCs in check mode.

      Result
      Proceed to
      NEXT

    NEXT

    END

  9. CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the glow plug controller connector.

    2. Remove the instrument panel junction block assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C99-4 (+B) - 2G-3 Always Below 1 Ω
      C99-4 (+B) or 2G-3 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  10. CHECK CHARGING SYSTEM


    1. Check the charging system and perform repairs as necessary.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 13 Click here

  11. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 13 Click here

  12. REPLACE GLOW PLUG CONTROLLER


    1. Replace the glow plug controller.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  13. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

    4. Turn the ignition switch to ON.

    5. Turn the GTS on.

    6. Using the GTS, switch the ECM from normal mode to check mode.


      Powertrain > Engine > Utility
      Tester Display
      Check Mode

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

    8. Confirm that the DTC is not output again.


      Powertrain > Engine > Trouble Codes

      Tech Tips

      Check for DTCs in check mode.

      Result
      Proceed to
      NEXT

    NEXT

    END