Ecd System (W/ Dpf) Ecm Power Source 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

INSPECT INTEGRATION RELAY (INTEGRATION RELAY - BODY GROUND)

INSPECT INTEGRATION RELAY (EFI RELAY AND IG2 RELAY)

CHECK HARNESS AND CONNECTOR (+B AND MREL CIRCUIT)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

INSPECT FUSE (IGN)

CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM, INTEGRATION RELAY - BODY GROUND)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ENGINE ROOM RELAY BLOCK)

CHECK ENTRY AND START SYSTEM (POWER SOURCE MODE DOES NOT CHANGE)

ECD SYSTEM (w/ DPF) - ECM Power Source Circuit


DESCRIPTION

When the engine switch is turned on (IG), the battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes current to flow to the coil, closing the contacts of the integration relay (EFI relay) and supplying power to terminal +B of the ECM.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit


Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
1.INSPECT INTEGRATION RELAY (INTEGRATION RELAY - BODY GROUND)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit

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

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1C-1 - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT INTEGRATION RELAY (EFI RELAY AND IG2 RELAY)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit

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

  1. Inspect the EFI MAIN fuse and the IG2 MAIN fuse.

    1. Remove the EFI MAIN fuse and IG2 MAIN fuse from the integration relay.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      EFI MAIN fuse
      		Always
      		Below 1 Ω
      IG2 MAIN fuse
      		Always
      		Below 1 Ω

  1. Inspect the EFI relay and the IG2 relay.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      1C-1 - 1B-4
      		Battery voltage not applied to terminals 1B-2 and 1B-3
      		10 kΩ or higher
      Battery voltage applied to terminals 1B-2 and 1B-3
      		Below 1 Ω
      1C-1 - 1B-8
      		Battery voltage not applied to terminals 1B-7 and 1B-6
      		10 kΩ or higher
      Battery voltage applied to terminals 1B-7 and 1B-6
      		Below 1 Ω


NG
REPLACE INTEGRATION RELAY
OK


3.CHECK HARNESS AND CONNECTOR (+B AND MREL CIRCUIT)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit

  1. Check the harness and the connectors between the integration relay and the ECM.

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

    2. Disconnect the ECM connector.

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

      Standard Resistance:
      for LHD
      Tester Connection
      		Condition
      		Specified Condition
      A38-44 (MREL) - 1B-2
      		Always
      		Below 1 Ω
      A38-2 (+B) - 1B-4
      		Always
      		Below 1 Ω
      A38-1 (+B2) - 1B-4
      		Always
      		Below 1 Ω
      A38-44 (MREL) or 1B-2 - Body ground
      		Always
      		10 kΩ or higher
      A38-2 (+B) or 1B-4 - Body ground
      		Always
      		10 kΩ or higher
      A38-1 (+B2) or 1B-4 - Body ground
      		Always
      		10 kΩ or higher
      for RHD
      Tester Connection
      		Condition
      		Specified Condition
      A52-44 (MREL) - 1B-2
      		Always
      		Below 1 Ω
      A52-2 (+B) - 1B-4
      		Always
      		Below 1 Ω
      A52-1 (+B2) - 1B-4
      		Always
      		Below 1 Ω
      A52-44 (MREL) or 1B-2 - Body ground
      		Always
      		10 kΩ or higher
      A52-2 (+B) or 1B-4 - Body ground
      		Always
      		10 kΩ or higher
      A52-1 (+B2) or 1B-4 - Body ground
      		Always
      		10 kΩ or higher

  1. Check the harness and connectors between the integration relay and body ground.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      1B-3 - Body ground
      		Always
      		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit

  1. Disconnect the ECM connector.

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    C45-81 (E1) - Body ground
    		Always
    		Below 1 Ω
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    C46-81 (E1) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.INSPECT ECM (IGSW VOLTAGE)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit

  1. Disconnect the ECM connectors.

  1. Turn the engine switch on (IG).

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

    Standard Voltage:
    for LHD
    Tester Connection
    		Switch Condition
    		Specified Condition
    A38-28 (IGSW) - C45-81 (E1)
    		Engine switch on (IG)
    		11 to 14 V
    for RHD
    Tester Connection
    		Switch Condition
    		Specified Condition
    A52-28 (IGSW) - C46-81 (E1)
    		Engine switch on (IG)
    		11 to 14 V


NG
Go to step 6
OK

REPLACE ECM (Click here)

6.INSPECT FUSE (IGN)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit

  1. Remove the IGN fuse 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
    IGN fuse
    		Always
    		Below 1 Ω


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


7.CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ECM, INTEGRATION RELAY - BODY GROUND)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit

  1. Remove the integration 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:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    1B-8 - A38-28 (IGSW)
    		Always
    		Below 1 Ω
    1B-8 or A38-28 (IGSW) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    1B-8 - A52-28 (IGSW)
    		Always
    		Below 1 Ω
    1B-8 or A52-28 (IGSW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ENGINE ROOM RELAY BLOCK)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Vd-Ftv Engine Control.Ecd System (W/ Dpf).Ecd System (W/ Dpf) Ecm Power Source Circuit

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

  1. Disconnect the E2 main body ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E2-11 (IG2D) - 1B-6
    		Always
    		Below 1 Ω
    E2-11 (IG2D) or 1B-6 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


9.CHECK ENTRY AND START SYSTEM (POWER SOURCE MODE DOES NOT CHANGE)

  1. Check the entry and start system (Click here).



NG
REPAIR ENTRY AND START SYSTEM
OK

REPLACE ECM (Click here)