Sfi System Ecm Power Source Circuit

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
1Gr-Fe Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BATTERY)

INSPECT INTEGRATION RELAY (EFI RELAY AND IG2 RELAY)

CHECK HARNESS AND CONNECTOR (+B, +B2 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 IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM

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

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

CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - ENGINE ROOM RELAY BLOCK)

INSPECT IGNITION SWITCH ASSEMBLY

SFI SYSTEM - ECM Power Source Circuit


DESCRIPTION

When the ignition switch is turned to ON, battery voltage is applied to the IGSW of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contacts of the integration relay (EFI relay) and supplying power to either terminal +B or +B2 of the ECM.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit


Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BATTERY)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System 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)

  1. Inspect the integration relay (Click here).



NG
REPLACE INTEGRATION RELAY
OK


3.CHECK HARNESS AND CONNECTOR (+B, +B2 AND MREL CIRCUIT)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System 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
      A38-34 (MREL) - 1B-2
      		Always
      		Below 1 Ω
      A38-3 (+B) - 1B-4
      		Always
      		Below 1 Ω
      A38-2 (+B2) - 1B-4
      		Always
      		Below 1 Ω
      A38-34 (MREL) or 1B-2 - Body ground
      		Always
      		10 kΩ or higher
      A38-3 (+B) or 1B-4 - Body ground
      		Always
      		10 kΩ or higher
      A38-2 (+B2) or 1B-4 - Body ground
      		Always
      		10 kΩ or higher
      for RHD
      Tester Connection
      		Condition
      		Specified Condition
      A52-34 (MREL) - 1B-2
      		Always
      		Below 1 Ω
      A52-3 (+B) - 1B-4
      		Always
      		Below 1 Ω
      A52-2 (+B2) - 1B-4
      		Always
      		Below 1 Ω
      A52-34 (MREL) or 1B-2 - Body ground
      		Always
      		10 kΩ or higher
      A52-3 (+B) or 1B-4 - Body ground
      		Always
      		10 kΩ or higher
      A52-2 (+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 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System 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 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit

  1. Disconnect the ECM connector.

  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)
    		Ignition switch ON
    		11 to 14 V
    for RHD
    Tester Connection
    		Switch Condition
    		Specified Condition
    A52-28 (IGSW) - C46-81 (E1)
    		Ignition switch ON
    		11 to 14 V


NG
Go to step 6
OK

REPLACE ECM (Click here)

6.INSPECT FUSE (IGN)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System 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 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System 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 IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM

Result
Result
Proceed to
w/ Entry and Start System
A
w/o Entry and Start System
B


B
Go to step 11
A


9.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ENGINE ROOM RELAY BLOCK)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System 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


10.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 (Click here)
OK

REPLACE ECM (Click here)

11.CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - ENGINE ROOM RELAY BLOCK)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit

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

  1. Disconnect the E93 ignition switch connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E93-6 (IG2) - 1B-6
    		Always
    		Below 1 Ω
    1B-7 - Body ground
    		Always
    		Below 1 Ω
    E93-6 (IG2) or 1B-6 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


12.INSPECT IGNITION SWITCH ASSEMBLY

  1. Inspect the ignition switch assembly (Click here).



NG
REPLACE IGNITION SWITCH ASSEMBLY (Click here)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)