ECD SYSTEM(for Swirl Control Valve), 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.

DTC Detection Condition

Trouble Area

P052F

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

WIRING DIAGRAM

A351170E03

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).

    REPLACE GLOW PLUG RELAY ASSEMBLYClick here

  2. CHECK GLOW PLUG CONTROLLER ASSEMBLY (BATT)

    U122332E02

    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

      Switch Condition

      Specified Condition

      X1-7 (BATT) - Body ground

      Always

      11 to 14 V
      Table 1. Text in Illustration

      *a

      Front view of wire harness connector

      (to glow plug controller assembly)

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

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

    U122324E02

    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

      Switch Condition

      Specified Condition

      C96-1 (+B) - Body ground

      Ignition switch ON

      11 to 14 V

      C96-1 (+B) - Body ground

      Ignition switch ON

      Below 0.5 V
      Table 2. Text in Illustration

      *a

      Front view of wire harness connector

      (to glow plug controller assembly)

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

  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

      C96-2 (GND) - C112-96 (EGCU)

      Always

      Below 1 Ω

      C96-2 (GND) or C112-96 (EGCU) - Body ground

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  5. REPLACE GLOW PLUG CONTROLLER ASSEMBLY

    1. Replace the glow plug controller assembly (Click here)

  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 (Click here).

    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.

    8. Confirm that the DTC is not output again.

    END

    REPLACE ECMClick here

  7. 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 relay from the engine room No. 1 relay block.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      X1-7 (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 relay holder)*1

      2 (glow plug relay holder) - 5 (EFI MAIN relay holder)*2

      Always

      Below 1 Ω

      1 (glow plug relay holder) - Body ground

      Always

      Below 1 Ω

      X1-7 (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*1

      2 (glow plug relay holder) or 5 (EFI MAIN relay holder) - Body ground*2

      Always

      10 kΩ or higher

      • *1: for LHD

      • *2: for RHD

    CHECK ECM POWER SOURCE CIRCUITClick here

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

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

    1. Disconnect the glow plug controller assembly connector.

    2. Remove the EFI MAIN relay from the engine room No. 1 relay block.

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

      Standard Resistance (for LHD)

      Tester Connection

      Condition

      Specified Condition

      C96-1 (+B) - 3 (EFI MAIN relay holder)

      Always

      Below 1 Ω

      C96-1 (+B) or 3 (EFI MAIN relay holder) - Body ground

      Always

      10 kΩ or higher

      Standard Resistance (for RHD)

      Tester Connection

      Condition

      Specified Condition

      C96-1 (+B) - 5 (EFI MAIN relay holder)

      Always

      Below 1 Ω

      C96-1 (+B) or 5 (EFI MAIN relay holder) - Body ground

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  9. 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.

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  10. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  11. REPLACE GLOW PLUG RELAY ASSEMBLY

    1. Replace the glow plug relay assembly.

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  12. REPLACE ECM

    1. Replace the ECM (Click here).

  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 (Click here).

    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.

    8. Confirm that the DTC is not output again.

    END