Sfi System Ecm Power Source Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK NO. 1 INTEGRATION RELAY (POWER SOURCE)

INSPECT NO. 1 INTEGRATION RELAY (EFI)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM, BODY GROUND)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

INSPECT NO. 1 INTEGRATION RELAY (IG2)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM)

CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - MAIN BODY ECU, BODY GROUND)

SFI SYSTEM - 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 a current to flow to the coil of the No. 1 integration relay (EFI relay), closing the contacts and supplying power to terminals +B and +B2 of the ECM.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.1Ur-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 NO. 1 INTEGRATION RELAY (POWER SOURCE)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Ur-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit

  1. Remove the No. 1 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
    Text in Illustration
    *1
    		No. 1 Integration relay
    *a
    		Front view of wire harness connector
    (to No. 1 Integration Relay)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - BATTERY)
OK


2.INSPECT NO. 1 INTEGRATION RELAY (EFI)

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



NG
REPLACE NO. 1 INTEGRATION RELAY
OK


3.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM, BODY GROUND)

  1. Check the harness and connectors between the No. 1 integration relay and ECM.

    1. Remove the No. 1 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 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

      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

  1. Check the harness and connectors between the No. 1 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)

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    C46-81 (E1) - Body ground
    		Always
    		Below 1 Ω

    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    C45-81 (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 Vdj200.1Ur-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:
    for RHD
    Tester Connection
    		Switch Condition
    		Specified Condition
    A52-28 (IGSW) - C46-81 (E1)
    		Engine switch on (IG)
    		11 to 14 V
    for LHD
    Tester Connection
    		Switch Condition
    		Specified Condition
    A38-28 (IGSW) - C45-81 (E1)
    		Engine switch on (IG)
    		11 to 14 V
    Text in Illustration
    *A
    		for RHD
    *B
    		for LHD
    *a
    		Front view of wire harness connector
    (to ECM)


NG
Go to step 6
OK

REPLACE ECM (Click here)

6.INSPECT NO. 1 INTEGRATION RELAY (IG2)

  1. Inspect the No. 1 integration relay (IG2) (Click here).



NG
REPLACE NO. 1 INTEGRATION RELAY
OK


7.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM)

  1. Remove the No. 1 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 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

    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

    Result:

    Result
    		Proceed to
    Out of normal range
    		A
    Within normal range
    		B


B
Go to step 8
A

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - MAIN BODY ECU, BODY GROUND)

  1. Remove the No. 1 integration relay from the engine room relay block.

  1. Disconnect the Main body ECU connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    1B-6 - E2-11 (IG2D)
    		Always
    		Below 1 Ω
    1B-7 - Body ground
    		Always
    		Below 1 Ω
    1B-6 or E2-11 (IG2D) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

CHECK ENTRY AND START SYSTEM (Click here)