Dtc P052F Glow Plug Control Module System Voltage


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT

CHECK GLOW PLUG CONTROLLER (POWER SOURCE CIRCUIT)

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

CHECK HARNESS AND CONNECTOR (GLOW PLUG CONTROLLER - ECM)

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

CHECK CHARGING SYSTEM

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE GLOW PLUG CONTROLLER

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

REPLACE ECM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

REPLACE GLOW PLUG CONTROLLER

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P052F Glow Plug Control Module System Voltage

DTC 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).
  1. Open or short circuit in ground wire
  2. Open or short circuit in battery wire
  3. Open in SI wire
  4. SI wire short circuit to ground or battery
  5. Open in DI wire
  6. DI wire short circuit to ground or battery
  7. Low battery voltage
  8. Glow plug controller
  9. ECM

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P052F Glow Plug Control Module System Voltage


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  2. After replacing the ECM, the new ECM needs registration (LandCruiser RM0000012XK0AVX.html) and initialization (LandCruiser RM000000TIN08IX.html).
HINT:
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.
1.CHECK DTC OUTPUT

  1. Connect the GTS to the DLC3.

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

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC P0683 is output
    		A
    DTC P052F is output
    		B


B
Go to step 12
A


2.CHECK GLOW PLUG CONTROLLER (POWER SOURCE CIRCUIT)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P052F Glow Plug Control Module System Voltage

  1. Disconnect the glow plug controller connector.

  1. 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
    		11 to 14 V
    A83-4 (+B) - Body ground
    		Engine switch off
    		Below 0.5 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Glow Plug Controller)

  1. Reconnect the glow plug controller connector.



NG
Go to step 5
OK


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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P052F Glow Plug Control Module System Voltage

  1. Disconnect the glow plug controller connector.

  1. 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

  1. Reconnect the glow plug controller connector.



NG
Go to step 7
OK


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

  1. Disconnect the glow plug controller connector.

  1. Disconnect the ECM connector.

  1. 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

  1. Reconnect the glow plug controller connector.

  1. Reconnect the ECM connector.



OK
Go to step 8

NG
Go to step 7

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

  1. Disconnect the glow plug controller connector.

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

  1. 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

  1. Reconnect the glow plug controller connector.

  1. Reinstall the No. 1 integration relay



NG
Go to step 7
OK


6.CHECK CHARGING SYSTEM

  1. Check the charging system and perform repairs as necessary (LandCruiser RM000001AR90CCX.html).



NEXT
Go to step 13

7.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.



NEXT
Go to step 13

8.REPLACE GLOW PLUG CONTROLLER

  1. Replace the glow plug controller (LandCruiser RM000004LIW012X.html).


NEXT


9.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (LandCruiser RM000000PDK1ENX.html).

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

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Using the GTS, switch the ECM from normal mode to check mode (LandCruiser RM000000PDL0Z5X.html).

  1. Confirm that the DTC is not output again.

    HINT:
    Check for DTCs in check mode.


NG
Go to step 10
OK

END

10.REPLACE ECM

  1. Replace the ECM (LandCruiser RM0000013Z002DX.html).


NEXT


11.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (LandCruiser RM000000PDK1ENX.html).

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

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Using the GTS, switch the ECM from normal mode to check mode (LandCruiser RM000000PDL0Z5X.html).

  1. Confirm that the DTC is not output again.

    HINT:
    Check for DTCs in check mode.

NEXT

END

12.REPLACE GLOW PLUG CONTROLLER

  1. Replace the glow plug controller (LandCruiser RM000004LIW012X.html)


NEXT


13.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (LandCruiser RM000000PDK1ENX.html).

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

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Using the GTS, switch the ECM from normal mode to check mode (LandCruiser RM000000PDL0Z5X.html).

  1. Confirm that the DTC is not output again.

    HINT:
    Check for DTCs in check mode.

NEXT

END