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 MAIN NO.1 RELAY AND IG2 MAIN NO.1 RELAY)

CHECK HARNESS AND CONNECTOR (+B, +B2 AND MREL CIRCUIT)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

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 (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - 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:
    for LHD:
    Tester Connection
    		Condition
    		Specified Condition
    1Y-1 - Body ground
    		Always
    		11 to 14 V
    for RHD:
    Tester Connection
    		Condition
    		Specified Condition
    1X-1 - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *A
    		for LHD:
    *B
    		for RHD:
    *a
    		Front view of wire harness connector (to Integration Relay)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT INTEGRATION RELAY (EFI MAIN NO.1 RELAY AND IG2 MAIN NO.1 RELAY)

  1. Inspect the integration relay (Click here).



NG
REPLACE INTEGRATION RELAY
OK


3.CHECK HARNESS AND CONNECTOR (+B, +B2 AND MREL 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) - 1S-8
      		Always
      		Below 1 Ω
      A38-3 (+B) - 1S-11
      		Always
      		Below 1 Ω
      A38-2 (+B2) - 1S-11
      		Always
      		Below 1 Ω
      A38-34 (MREL) or 1S-8 - Body ground
      		Always
      		10 kΩ or higher
      A38-3 (+B) or 1S-11 - Body ground
      		Always
      		10 kΩ or higher
      A38-2 (+B2) or 1S-11 - Body ground
      		Always
      		10 kΩ or higher
      for RHD
      Tester Connection
      		Condition
      		Specified Condition
      A52-34 (MREL) - 1S-8
      		Always
      		Below 1 Ω
      A52-3 (+B) - 1S-11
      		Always
      		Below 1 Ω
      A52-2 (+B2) - 1S-11
      		Always
      		Below 1 Ω
      A52-34 (MREL) or 1S-8 - Body ground
      		Always
      		10 kΩ or higher
      A52-3 (+B) or 1S-11 - Body ground
      		Always
      		10 kΩ or higher
      A52-2 (+B2) or 1S-11 - 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
      1S-4 - Body ground
      		Always
      		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

  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
    Text in Illustration
    *A
    		for LHD
    *B
    		for RHD
    *a
    		Front view of wire harness connector (to ECM)


NG
Go to step 6
OK

REPLACE ECM (Click here)

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

  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
    1P-7 - A38-28 (IGSW)
    		Always
    		Below 1 Ω
    1P-7 or A38-28 (IGSW) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    1P-7 - A52-28 (IGSW)
    		Always
    		Below 1 Ω
    1P-7 or A52-28 (IGSW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.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 10
A


8.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE ROOM RELAY BLOCK

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

  1. Disconnect the certification ECU (smart key ECU assembly) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E128-3 (IG1D) - 1R-2
    		Always
    		Below 1 Ω
    1S-4 - Body ground
    		Always
    		Below 1 Ω
    E2-11 (IG2D) or 1R-2 - 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 (Click here)
OK

REPLACE ECM (Click here)

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

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

  1. Disconnect the 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) - 1R-2
    		Always
    		Below 1 Ω
    1S-4 - Body ground
    		Always
    		Below 1 Ω
    E93-6 (IG2) or 1R-2 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


11.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)