Ecd System (W/O Dpf) Pre-Heating Control Circuit

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
1Vd-Ftv Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ECM TERMINAL VOLTAGE (GREL TERMINAL)

INSPECT GLOW RELAY (GLOW 1 or 2)

INSPECT FUSE (GLOW 1 and GLOW 2)

INSPECT GLOW PLUG ASSEMBLY (RESISTANCE)

CHECK GLOW PLUG ASSEMBLY (INSTALLATION)

CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY - GLOW PLUG - BATTERY AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY - ECM AND BODY GROUND)

ECD SYSTEM (w/o DPF) - Pre-heating Control Circuit


DESCRIPTION

The glow plug is mounted inside the engine combustion chamber. To ensure efficient engine starting with a cold engine, the ECM calculates a time interval of the current that needs to flow through the glow plug depending on the starting engine coolant temperature when the ignition switch is turned to ON. The ECM then turns on the glow plug relay and permits current to flow through the glow plug based on the ECM calculated time. The glow plug is then heated, and enhances fuel combustion with a cold engine.
This DTC will be stored if the glow plug or the circuit is open.

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/O Dpf) Pre-Heating Control Circuit

HINT:
  1. These troubleshooting procedures are for: 1) difficult engine starting in cold weather, and 2) difficulty driving/vehicle malfunctions in cold weather immediately after engine is started.
  2. After the engine is started, the ECM performs an "after-glow" for a certain period of time. In proportion to the actual engine coolant temperature, the time period varies. The after-glow reduces diesel engine knocking, white smoke emissions and engine noises when the engine is cold.

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/O Dpf) Pre-Heating Control Circuit


WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/O Dpf) Pre-Heating Control Circuit


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
1.CHECK ECM TERMINAL VOLTAGE (GREL TERMINAL)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/O Dpf) Pre-Heating Control Circuit

  1. Remove the GLOW 1 relay from the engine room relay block.

  1. Remove the GLOW 2 relay from the engine room relay block.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    GLOW 1 relay (2) - Body ground
    		Ignition switch ON
    		11 to 14 V
    GLOW 2 relay (2) - Body ground
    		Ignition switch ON
    		11 to 14 V


NG
Go to step 7
OK


2.INSPECT GLOW RELAY (GLOW 1 or 2)

  1. Inspect the GLOW 1 relay (Click here).

  1. Inspect the GLOW 2 relay (Click here).



NG
REPLACE GLOW RELAY (GLOW 1 or 2)
OK


3.INSPECT FUSE (GLOW 1 and GLOW 2)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/O Dpf) Pre-Heating Control Circuit

  1. Remove the GLOW 1 and GLOW 2 fuses from the engine room relay block.

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

    Standard Resistance:
    Component
    		Condition
    		Specified Condition
    GLOW 1 H-fuse
    		Always
    		Below 1 Ω
    GLOW 2 H-fuse
    		Always
    		Below 1 Ω


NG
CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE, AND REPLACE FUSE
OK


4.INSPECT GLOW PLUG ASSEMBLY (RESISTANCE)

  1. Inspect the glow plug assembly (Click here).



NG
REPLACE GLOW PLUG ASSEMBLY (Click here)
OK


5.CHECK GLOW PLUG ASSEMBLY (INSTALLATION)

  1. Check the glow plug installation (Click here).

    OK:
    Glow plugs are installed securely.


NG
TIGHTEN GLOW PLUG (Click here)
OK


6.CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY - GLOW PLUG - BATTERY AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/O Dpf) Pre-Heating Control Circuit

  1. Remove the GLOW 1 relay from the engine room relay block.

  1. Disconnect the C77 glow plug connector.

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

    Standard Resistance (Check for Open):
    No. 1
    Tester Connection
    		Condition
    		Specified Condition
    GLOW 1 relay (3) - C77-1
    		Always
    		Below 1 Ω
    GLOW 1 relay (5) - Positive (+) battery terminal cable
    		Always
    		Below 1 Ω
    GLOW 1 relay (1) - Body ground
    		Always
    		Below 1 Ω

  1. Remove the GLOW 2 relay from the engine room relay block.

  1. Disconnect the C78 glow plug connector.

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

    Standard Resistance (Check for Open):
    No. 2
    Tester Connection
    		Condition
    		Specified Condition
    GLOW 2 relay (3) - C78-1
    		Always
    		Below 1 Ω
    GLOW 2 relay (5) - Positive (+) battery terminal cable
    		Always
    		Below 1 Ω
    GLOW 2 relay (1) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

CHECK FOR INTERMITTENT PROBLEMS (Click here)

7.CHECK HARNESS AND CONNECTOR (GLOW PLUG RELAY - ECM AND BODY GROUND)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/O Dpf) Pre-Heating Control Circuit

  1. Remove the GLOW 1 relay from the engine room relay block.

  1. Remove the GLOW 2 relay from the engine room relay block.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    GLOW 1 relay (2) - C45-63 (GREL)
    		Always
    		Below 1 Ω
    GLOW 2 relay (2) - C45-62 (GRL2)
    		Always
    		Below 1 Ω
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    GLOW 1 relay (2) - C46-63 (GREL)
    		Always
    		Below 1 Ω
    GLOW 2 relay (2) - C46-62 (GRL2)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    GLOW 1 relay (2) or C45-63 (GREL) - Body ground
    		Always
    		10 kΩ or higher
    GLOW 2 relay (2) or C45-62 (GRL2) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    GLOW 1 relay (2) or C46-63 (GREL) - Body ground
    		Always
    		10 kΩ or higher
    GLOW 2 relay (2) or C46-62 (GRL2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Click here)