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 plugs are turned on during PM forced regeneration in order to prevent the engine speed from rising due to an increase in fuel injection volume used to increase the exhaust gas temperature. 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.

P052F
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Enter check mode 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
P0683
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Enter check mode 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

WIRING DIAGRAM

B001DE6E01

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 (See page ) 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 engine switch on (IG) 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 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. B001F59E01
      Text in Illustration
      *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
      A83-4 (+B) - Body ground Engine switch on (IG) 11 to 14 V
      A83-4 (+B) - Body ground Engine switch off Below 0.5 V

    3. Reconnect the glow plug controller connector.


    NG

    CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - NO. 1 INTEGRATION RELAY) Click here

    OK

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


    1. B001HLVE01

      Disconnect the glow plug controller connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A83-1 (GND) - Body ground Always Below 1 Ω

    3. Reconnect the glow plug controller connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR 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
      A83-3 (SI) - C150-11 (GLDO) Always Below 1 Ω
      A83-5 (DI) - C150-10 (GLDI) Always Below 1 Ω
      A83-3 (SI) or C150-11 (GLDO) - Body ground and other terminals Always 10 kΩ or higher
      A83-5 (DI) or C150-10 (GLDI) - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the glow plug controller connector.

    5. Reconnect the ECM connector.


    OK

    REPLACE GLOW PLUG CONTROLLER Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

  5. CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - NO. 1 INTEGRATION RELAY)


    1. Disconnect the glow plug controller connector.

    2. Remove the No. 1 integration relay from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A83-4 (+B) - 1K-21 Always Below 1 Ω
      A83-4 (+B) or 1K-21 - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the glow plug controller connector.

    5. Reinstall the No. 1 integration relay


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  6. CHECK CHARGING SYSTEM


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


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. REPLACE GLOW PLUG CONTROLLER


    1. Replace the glow plug controller Click here.


    NEXT

  9. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

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

    4. Turn the engine switch on (IG) and turn the GTS on.

    5. Using the GTS, switch the ECM from normal mode to check mode Click here.

    6. Read the DTCs.

      OK
      No DTC output.

      Tech Tips

      Check for DTCs in check mode.


    OK

    END

    NG

  10. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

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

    4. Turn the engine switch on (IG) and turn the GTS on.

    5. Using the GTS, switch the ECM from normal mode to check mode Click here.

    6. Confirm that the DTC is not output again.

      Tech Tips

      Check for DTCs in check mode.


    NEXT

    END

  12. REPLACE GLOW PLUG CONTROLLER


    1. Replace the glow plug controller Click here


    NEXT

  13. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

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

    4. Turn the engine switch on (IG) and turn the GTS on.

    5. Using the GTS, switch the ECM from normal mode to check mode Click here.

    6. Confirm that the DTC is not output again.

      Tech Tips

      Check for DTCs in check mode.


    NEXT

    END