Dtc P064C Glow Plug Control Module


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT

CHECK GLOW PLUG CONTROLLER

CHECK HARNESS AND CONNECTOR

INSPECT GLOW PLUG ASSEMBLY

REPLACE GLOW PLUG ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

CHECK HARNESS AND CONNECTOR

REPLACE GLOW PLUG CONTROLLER

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

REPLACE GLOW PLUG ASSEMBLY

CHECK HARNESS AND CONNECTOR

REPLACE GLOW PLUG CONTROLLER

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

INSPECT GLOW RELAY

CHECK HARNESS AND CONNECTOR

DTC P064C Glow Plug Control Module

DTC P066B Cylinder 1 Glow Plug Control Circuit High

DTC P066D Cylinder 2 Glow Plug Control Circuit High

DTC P066F Cylinder 3 Glow Plug Control Circuit High

DTC P0671 Cylinder 1 Glow Plug Circuit/Open

DTC P0672 Cylinder 2 Glow Plug Circuit/Open

DTC P0673 Cylinder 3 Glow Plug Circuit/Open

DTC P0674 Cylinder 4 Glow Plug Circuit/Open

DTC P067B Cylinder 4 Glow Plug Control Circuit High

DTC P166F Glow Plug Control Module Circuit Short


DESCRIPTION


P064C
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
The MOS inside the glow plug control unit is detected as being stuck on 3 times while the glow plugs are on (2 trip detection logic).
Glow plug controller

P066B
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
A short circuit in the No. 1 glow plug circuit is detected 3 times while the glow plugs are on (2 trip detection logic).
  1. Glow plug controller
  2. No. 1 glow plug assembly
  3. Short in No. 1 glow plug circuit

P066D
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
A short circuit in the No. 2 glow plug circuit is detected 3 times while the glow plugs are on (2 trip detection logic).
  1. Glow plug controller
  2. No. 2 glow plug assembly
  3. Short in No. 2 glow plug circuit

P066F
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
A short circuit in the No. 3 glow plug circuit is detected 3 times while the glow plugs are on (2 trip detection logic).
  1. Glow plug controller
  2. No. 3 glow plug assembly
  3. Short in No. 3 glow plug circuit

P067B
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
A short circuit in the No. 4 glow plug circuit is detected 3 times while the glow plugs are on (2 trip detection logic).
  1. Glow plug controller
  2. No. 4 glow plug assembly
  3. Short in No. 4 glow plug circuit

P0671
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
An open circuit in the No. 1 glow plug circuit is detected 3 times while the glow plugs are on (2 trip detection logic).
  1. Glow plug controller
  2. No. 1 glow plug assembly
  3. Open in No. 1 glow plug circuit

P0672
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
An open circuit in the No. 2 glow plug circuit is detected 3 times while the glow plugs are on (2 trip detection logic).
  1. Glow plug controller
  2. No. 2 glow plug assembly
  3. Open in No. 2 glow plug circuit

P0673
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
An open circuit in the No. 3 glow plug circuit is detected 3 times while the glow plugs are on (2 trip detection logic).
  1. Glow plug controller
  2. No. 3 glow plug assembly
  3. Open in No. 3 glow plug circuit

P0674
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
An open circuit in the No. 4 glow plug circuit is detected 3 times while the glow plugs are on (2 trip detection logic).
  1. Glow plug controller
  2. No. 4 glow plug assembly
  3. Open in No. 4 glow plug circuit

P166F
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Enter check mode
A short circuit in a wire harness between the glow plugs is detected 3 times while the glow plugs are on (2 trip detection logic).
  1. Glow plug controller
  2. Open or short in glow plug circuit

WIRING DIAGRAM

Refer to DTC P052F (LandCruiser RM000004HXU022X_02.html)

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 RM0000012XK0AUX.html) and initialization (LandCruiser RM000000TIN08HX.html).
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 P0671, P0672, P0673 and/or P0674 is output
    		A
    DTC P066B, P066D, P066F and/or P067B is output
    		B
    DTC P064C and/or P166F is output
    		C


B
Go to step 8

C
Go to step 13
A


2.CHECK GLOW PLUG CONTROLLER


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P064C Glow Plug Control Module

  1. Disconnect the glow plug controller connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A80-1(BATT) - Body ground
    		Always
    		11 to 14 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 17
OK


3.CHECK HARNESS AND CONNECTOR


  1. Disconnect connectors of the glow plug controller.


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P064C Glow Plug Control Module

  1. Remove the No. 1 glow plug connector from the glow plug.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    A82-1 (GL1) - No. 1 glow plug connector terminal 1
    		Always
    		Below 1 Ω
    A82-2 (GL2) - No. 1 glow plug connector terminal 2
    		Always
    		Below 1 Ω
    A92-1 (GL3) - No. 1 glow plug connector terminal 3
    		Always
    		Below 1 Ω
    A92-2 (GL4) - No. 1 glow plug connector terminal 4
    		Always
    		Below 1 Ω

    Text in Illustration
    *1
    		No. 1 Glow Plug Connector
    		-
    		-
    *a
    		Front view of wire harness connector
    (to Glow Plug Controller)
    		*b
    		Front view of wire harness connector
    (to Glow Plug Controller)

  1. Reconnect the glow plug controller connector.

  1. Reinstall the No. 1 glow plug connector.



NG
Go to step 6
OK


4.INSPECT GLOW PLUG ASSEMBLY

  1. Clear the DTCs (LandCruiser RM000000PDK1E5X.html).

  1. Exchange the glow plugs of the malfunctioning cylinders (the cylinders indicated by output DTCs) with the glow plugs of normally functioning cylinders.

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

  1. Using the GTS, switch the ECM from normal mode to check mode (LandCruiser RM000000PDL0YPX.html).

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    Same DTCs (that have been erased)
    		A
    Other DTCs
    		B
    HINT:
    Check for DTCs in check mode.


A
Go to step 14
B


5.REPLACE GLOW PLUG ASSEMBLY

  1. Replace the glow plug assembly (LandCruiser RM000000JIT01FX.html).



NEXT
Go to step 7

6.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


7.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (LandCruiser RM000000PDK1E5X.html).

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

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

  1. Using the GTS, switch the ECM from normal mode to check mode (LandCruiser RM000000PDL0YPX.html).

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

  1. Confirm that the DTC is not output again.

    HINT:
    Check for DTCs in check mode.

NEXT

END

8.CHECK HARNESS AND CONNECTOR


  1. Disconnect connectors of the glow plug controller.


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P064C Glow Plug Control Module

  1. Remove the No. 1 glow plug connector from the glow plug.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    A82-1 (GL1) or No. 1 glow plug connector terminal 1 - Body ground
    		Always
    		Below 1 Ω
    A82-2 (GL2) or No. 1 glow plug connector terminal 2 - Body ground
    		Always
    		Below 1 Ω
    A92-1 (GL3) or No. 1 glow plug connector terminal 3 - Body ground
    		Always
    		Below 1 Ω
    A92-2 (GL4) or No. 1 glow plug connector terminal 4 - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration
    *1
    		No. 1 Glow Plug Connector
    		-
    		-
    *a
    		Front view of wire harness connector
    (to Glow Plug Controller)
    		*b
    		Front view of wire harness connector
    (to Glow Plug Controller)
    HINT:
    Make sure that there are no short circuits to the battery.

  1. Reconnect the glow plug controller connector.

  1. Reinstall the No. 1 glow plug connector.



NG
Go to step 10
OK


9.REPLACE GLOW PLUG CONTROLLER

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



NEXT
Go to step 11

10.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


11.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (LandCruiser RM000000PDK1E5X.html).

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

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

  1. Using the GTS, switch the ECM from normal mode to check mode (LandCruiser RM000000PDL0YPX.html).

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

  1. Confirm that the DTC is not output again.

    OK:
    No DTC is output.
    HINT:
    Check for DTCs in check mode.


NG
Go to step 12
OK

END

12.REPLACE GLOW PLUG ASSEMBLY

  1. Replace the glow plug assembly (LandCruiser RM000000JIT01FX.html).



NEXT
Go to step 16

13.CHECK HARNESS AND CONNECTOR


  1. Disconnect connectors of the glow plug controller.


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System. Dtc P064C Glow Plug Control Module

  1. Remove the No. 1 glow plug connector from the glow plug.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    A82-1 (GL1) or No. 1 glow plug connector terminal 1 - Body ground
    		Always
    		Below 1 Ω
    A82-2 (GL2) or No. 1 glow plug connector terminal 2 - Body ground
    		Always
    		Below 1 Ω
    A92-1 (GL3) or No. 1 glow plug connector terminal 3 - Body ground
    		Always
    		Below 1 Ω
    A92-2 (GL4) or No. 1 glow plug connector terminal 4 - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration
    *1
    		No. 1 Glow Plug Connector
    		-
    		-
    *a
    		Front view of wire harness connector
    (to Glow Plug Controller)
    		*b
    		Front view of wire harness connector
    (to Glow Plug Controller)
    HINT:
    Make sure that there are no short circuits to the battery.

  1. Reconnect the glow plug controller connector.

  1. Reinstall the No. 1 glow plug connector.



NG
Go to step 15
OK


14.REPLACE GLOW PLUG CONTROLLER

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



NEXT
Go to step 16

15.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


16.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the GTS to the DLC3.

  1. Clear the DTCs (LandCruiser RM000000PDK1E5X.html).

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

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

  1. Using the GTS, switch the ECM from normal mode to check mode (LandCruiser RM000000PDL0YPX.html).

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

  1. Confirm that the DTC is not output again.

    HINT:
    Check for DTCs in check mode.

NEXT

END

17.INSPECT GLOW RELAY

  1. Inspect the GLOW relay (LandCruiser RM000003BIA03FX_01_0004.html).



NG
REPLACE GLOW RELAY
OK


18.CHECK HARNESS AND CONNECTOR

  1. Disconnect the cable from the negative (-) battery terminal.

  1. Disconnect the cable from the positive (+) battery terminal.

  1. Remove the GLOW relay assembly.

  1. Remove the No. 1 glow plug connector from the glow plug.

  1. Disconnect connectors of the glow plug controller.

  1. Disconnect the ECM connectors.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    GLOW relay terminal 5 - Battery positive terminal
    		Always
    		Below 1 Ω
    GLOW relay terminal 1 - Body ground
    		Always
    		Below 1 Ω
    GLOW relay terminal 3 - A80-1 (BATT)
    		Always
    		Below 1 Ω
    GLOW relay terminal 2 - G184-15 (GREL)
    		Always
    		Below 1 Ω
    GLOW relay terminal 5 or Battery positive terminal - Body ground and other terminals
    		Always
    		10 kΩ or higher
    GLOW relay terminal 3 or A80-1 (BATT) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    GLOW relay terminal 2 or G184-15 (GREL) - Body ground and other terminals
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (LandCruiser RM0000013Z002DX.html)