ECD SYSTEM, Diagnostic DTC:P052F

DTC Code DTC Name
P052F Glow Plug Control Module 1 System Voltage

DESCRIPTION

The glow plug controller assembly has a built-in voltage output stage during glow plug activation. The ECM activates the glow plugs by sending a signal indicating the required temperature to the glow plug controller assembly.

Also, the ECM sends control signals to the glow plug controller assembly via the LIN bus based on the values from various sensors.

When the glow plug control controller assembly detects a problem in the pre-heat system, it sends a report to the ECM via the LIN bus. The malfunction report is then stored inside the ECM

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P052F

Glow Plug Control Module 1 System Voltage

When glow plug controller assembly power supply voltage is low for 1.2 seconds or more.

(3 trip detection logic)

  • Glow plug controller assembly

  • Open or short in glow plug controller assembly circuit

  • ECM

Does not come on

DTC stored

WIRING DIAGRAM

A365975E02

CAUTION / NOTICE / HINT

Note:

  • When replacing the ECM, the ECM needs registration and initialization.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • 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. INSPECT GLOW PLUG RELAY ASSEMBLY

    1. Inspect the glow plug relay assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE GLOW PLUG RELAY ASSEMBLYClick here

    OK

  2. CHECK GLOW PLUG CONTROLLER ASSEMBLY (BATT)

    A351164C02

    *a

    Front view of wire harness connector

    (to Glow Plug Controller Assembly)

    1. Disconnect the glow plug controller assembly connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      k1-7 (BATT) - Body ground

      Always

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

  3. CHECK GLOW PLUG CONTROLLER ASSEMBLY (POWER SOURCE CIRCUIT)

    A351158C24

    *a

    Front view of wire harness connector

    (to Glow Plug Controller Assembly)

    1. Disconnect the glow plug controller assembly 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

      Switch Condition

      Specified Condition

      B121-1 (+B) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

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

    1. Disconnect the glow plug controller assembly 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

      B121-2 (GND) - B112-96 (EGCU)

      Always

      Below 1 Ω

      B121-2 (GND) or B112-96 (EGCU) - 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 ASSEMBLY

    1. Replace the glow plug controller assembly.

      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 and turn the GTS on.

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

  7. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  8. CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER ASSEMBLY - EFI MAIN NO. 1 RELAY)

    1. Disconnect the glow plug controller assembly connector.

    2. Remove the EFI MAIN NO. 1 relay from the engine room and junction block.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B121-1 (+B) - 3 (EFI MAIN NO. 1 relay holder)

      Always

      Below 1 Ω

      B121-1 (+B) or 3 (EFI MAIN NO. 1 relay holder) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    CHECK ECM POWER SOURCE CIRCUITClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  9. CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - RELAY - BATTERY)

    1. Disconnect the glow plug controller assembly connector.

    2. Remove the glow plug relay assembly.

    3. Remove the EFI MAIN NO. 1 relay from the engine room and junction block.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      k1-7 (BATT) - 3 (glow plug relay holder)

      Always

      Below 1 Ω

      4 (glow plug relay holder) - positive (+) battery terminal

      Always

      Below 1 Ω

      2 (glow plug relay holder) - 3 (EFI MAIN NO. 1 relay holder)

      Always

      Below 1 Ω

      1 (glow plug relay holder) - Body ground

      Always

      Below 1 Ω

      k1-7 (BATT) or 3 (glow plug relay holder) - Body ground

      Always

      10 kΩ or higher

      4 (glow plug relay holder) or positive (+) battery terminal - Body ground

      Always

      10 kΩ or higher

      2 (glow plug relay holder) or 3 (EFI MAIN relay holder) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  10. CHECK ECM POWER SOURCE CIRCUIT

    1. Check the ECM power source circuit.

      Click here

      Tip:

      If there are no malfunctions in the ECM power source circuit, recharge or replace the battery.

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  11. 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

  12. REPLACE GLOW PLUG RELAY ASSEMBLY

    1. Replace the glow plug relay assembly.

    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 and turn the GTS on.

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

    Result

    Proceed to

    NEXT
    NEXT

    END