ECD SYSTEM, Diagnostic DTC:P052F and 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 plug assemblies and ECM. The glow plug controller turns on the glow plug assembly of each cylinder according to the duty command signal from the ECM in order to maintain optimal engine temperatures. The glow plug assemblies 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 assemblies 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.

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 plug assemblies 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 plug assemblies 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 circuit in GND wire

  • Open or short circuit in BATT 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

Enter check mode

P0683

WIRING DIAGRAM

A298537E01

CAUTION / NOTICE / HINT

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).

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 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.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTC P0683 is output

      A

      DTC P052F is output

      B
    B

    REPLACE GLOW PLUG CONTROLLERClick here

    A

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF GLOW PLUG CONTROLLER)

    1. A241954C02

      *a

      Front view of wire harness connector

      (to Glow Plug Controller)

      Disconnect the glow plug controller 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

      A116-4 (+B) - Body ground

      Ignition switch ON

      11 to 14 V

      A116-4 (+B) - Body ground

      Ignition switch off

      Below 0.5 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - EFI-MAIN RELAY)Click here

    OK

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

    1. 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

      A116-1 (GND) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick 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

      A116-3 (SI) - B164-27 (GLDO)

      Always

      Below 1 Ω

      A116-5 (DI) - B164-56 (GLDI)

      Always

      Below 1 Ω

      A116-3 (SI) or B164-27 (GLDO) - Body ground

      Always

      10 kΩ or higher

      A116-5 (DI) or B164-56 (GLDI) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick 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. 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 for 30 seconds or more.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

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

      Click here

      Powertrain > Engine and ECT > Utility

      Tester Display

      Check Mode

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

    10. Confirm that the DTC is not output.

      Powertrain > Engine and ECT > Trouble Codes

      Tip:

      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. 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 for 30 seconds or more.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

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

      Click here

      Powertrain > Engine and ECT > Utility

      Tester Display

      Check Mode

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

    10. Confirm that the DTC is not output.

      Powertrain > Engine and ECT > Trouble Codes

      Tip:

      Check for DTCs in check mode.

    Result

    Proceed to

    NEXT
    NEXT

    END

  9. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  10. CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - EFI-MAIN RELAY)

    1. Disconnect the glow plug controller connector.

    2. Remove the EFI-MAIN relay from the engine room relay block and junction block assembly.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A116-4 (+B) - 3 (EFI-MAIN relay)

      Always

      Below 1 Ω

      A116-4 (+B) or 3 (EFI-MAIN relay) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  11. CHECK CHARGING SYSTEM

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

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick 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. 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 for 30 seconds or more.

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

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

      Click here

      Powertrain > Engine and ECT > Utility

      Tester Display

      Check Mode

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

    10. Confirm that the DTC is not output.

      Powertrain > Engine and ECT > Trouble Codes

      Tip:

      Check for DTCs in check mode.

    Result

    Proceed to

    NEXT
    NEXT

    END