Sfi System Ecm Power Source Circuit

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
3Ur-Fe Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT NO. 2 INTEGRATION RELAY (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BODY GROUND)

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

CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - ECM)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - ECM)

CHECK HARNESS AND CONNECTOR (SMART KEY ECU ASSEMBLY - NO. 2 INTEGRATION RELAY)

SFI SYSTEM - ECM Power Source Circuit


DESCRIPTION

When the engine switch is turned on (IG), the 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 No. 2 integration relay (EFI MAIN NO. 1 relay) and supplying power to either terminal +B or +B2 of the ECM.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.3Ur-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.INSPECT NO. 2 INTEGRATION RELAY (POWER SOURCE)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.3Ur-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit

  1. Disconnect the No. 2 integration relay connector.

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

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


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - NO. 2 INTEGRATION RELAY)
OK


2.CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BODY GROUND)

  1. Disconnect the No. 2 integration relay connector.

  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


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

  1. Inspect the No. 2 integration relay (Click here).



NG
REPLACE NO. 2 INTEGRATION RELAY
OK


4.CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - ECM)

  1. Disconnect the ECM connector.

  1. Disconnect the No. 2 integration relay connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    A38-6 (MREL) - 1S-8
    		Always
    		Below 1 Ω
    A38-2 (+B) - 1S-11
    		Always
    		Below 1 Ω
    A38-3 (+B2) - 1S-11
    		Always
    		Below 1 Ω
    A38-6 (MREL) or 1S-8 - Body ground
    		Always
    		10 kΩ or higher
    A38-2 (+B) or 1S-11 - Body ground
    		Always
    		10 kΩ or higher
    A38-3 (+B2) or 1S-11 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.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:
    Tester Connection
    		Condition
    		Specified Condition
    C45-81 (E1) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.INSPECT ECM (IGSW VOLTAGE)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.3Ur-Fe Engine Control.Sfi System.Sfi System 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:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A38-4 (IGSW) - Body ground
    		Engine switch on (IG)
    		11 to 14 V


OK
REPLACE ECM (Click here)

NG
Go to step 7

7.CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - ECM)

  1. Disconnect the ECM connector.

  1. Disconnect the No. 2 integration relay connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    A38-4 (IGSW) - 1P-7
    		Always
    		Below 1 Ω
    A38-4 (IGSW) or 1P-7 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


8.CHECK HARNESS AND CONNECTOR (SMART KEY ECU ASSEMBLY - NO. 2 INTEGRATION RELAY)

  1. Disconnect the smart key ECU assembly connector.

  1. Disconnect the No. 2 integration relay connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    E128-3 (IGSW) - 1R-2
    		Always
    		Below 1 Ω
    E128-3 (IGSW) or 1R-2 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

CHECK ENTRY AND START SYSTEM (Click here)