Sfi System Ecm Power Source Circuit

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
3Zr-Fae Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

INSPECT INTEGRATION NO.1 RELAY (EFI MAIN RELAY)

CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - ECM)

CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - BATTERY)

CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - BODY GROUND)

CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - ECM)

INSPECT IGNITION RELAY NO. 2 (IG2)

CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - ECM)

CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - BATTERY)

CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - BODY GROUND)

CHECK IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM

CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - IGNITION SWITCH)

INSPECT IGNITION SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - MAIN BODY ECU)

SFI SYSTEM - ECM Power Source Circuit


DESCRIPTION

When the ignition switch is turned to ON, battery voltage is applied to terminal IGSW 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 MAIN relay) and supplying power to either terminal +B or +B2 of the ECM.

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.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 (ECM - BODY GROUND)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.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:
    Tester Connection
    		Condition
    		Specified Condition
    B32-105 (E1) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BODY GROUND)
OK


2.INSPECT ECM (IGSW VOLTAGE)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.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:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A12-27 (IGSW) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.



NG
Go to step 8
OK


3.INSPECT INTEGRATION NO.1 RELAY (EFI MAIN RELAY)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

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

  1. Disconnect the integration relay connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1C-1 - 1A-4
    		Battery voltage not applied to terminal 1A-2 and 1A-3
    		10 kΩ or higher
    Battery voltage applied to terminal 1A-2 and 1A-3
    		Below 1 Ω
    Text in Illustration
    *1
    		Component without harness connected
    (Integration Relay)
    *2
    		Engine Room No. 1 Relay Block

  1. Reconnect the integration relay connector.

  1. Reinstall the integration relay.



NG
REPLACE INTEGRATION NO.1 RELAY (EFI MAIN RELAY)
OK


4.CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - ECM)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

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

  1. Disconnect the integration relay connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    1A-4 - A12-2 (+B)
    		Always
    		Below 1 Ω
    1A-4 - A12-1 (+B2)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    1A-4 or A12-2 (+B) - Body ground
    		Always
    		10 kΩ or higher
    1A-4 or A12-1 (+B2) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Integration Relay)
    *2
    		Engine Room No. 1 Relay Block
    *3
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.

  1. Reconnect the integration relay connector.

  1. Reinstall the integration relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - ECM)
OK


5.CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - BATTERY)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

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

  1. Disconnect the integration relay connector.

  1. Disconnect the cable from the negative (-) battery terminal.

  1. Disconnect the cable from the positive (+) battery terminal.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    1C-1 - Positive battery terminal
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    1C-1 or Positive battery terminal - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Integration Relay)
    *2
    		Engine Room No. 1 Relay Block

  1. Reconnect the integration relay connector.

  1. Reinstall the integration relay.

  1. Reconnect the cable to the positive (+) battery terminal.

  1. Reconnect the cable to the negative (-) battery terminal.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - BATTERY)
OK


6.CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - BODY GROUND)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

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

  1. Disconnect the integration relay connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1A-3 - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Integration Relay)
    *2
    		Engine Room No. 1 Relay Block

  1. Reconnect the integration relay connector.

  1. Reinstall the integration relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - BODY GROUND)
OK


7.CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - ECM)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

  1. Disconnect the ECM connector.

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

  1. Disconnect the integration relay connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    1A-2 - A12-44 (MREL)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    1A-2 or A12-44 (MREL) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Integration Relay)
    *2
    		Engine Room No. 1 Relay Block
    *3
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.

  1. Reconnect the integration relay connector.

  1. Reinstall the integration relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY [EFI MAIN RELAY] - ECM)
OK

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)

8.INSPECT IGNITION RELAY NO. 2 (IG2)

  1. Remove the ignition relay No. 2 (IG2) from the engine room No. 1 relay block.

  1. Inspect the ignition relay No. 2 (RAV4_ACA30 RM000001BT201IX_01_0003.html).

  1. Reinstall the ignition relay No. 2 (IG2).



NG
REPLACE IGNITION RELAY NO. 2 (IG2)
OK


9.CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - ECM)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

  1. Disconnect the ECM connector.

  1. Remove the ignition relay No. 2 (IG2) from the engine room No. 1 relay block.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 5 - A12-27 (IGSW)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 5 or A12-27 (IGSW) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Engine Room No. 1 Relay Block
    *2
    		IG2
    *3
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.

  1. Reinstall the ignition relay No. 2 (IG2).



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION RELAY NO. 2 (IG2) - ECM)
OK


10.CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - BATTERY)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

  1. Remove the ignition relay No. 2 (IG2) from the engine room No. 1 relay block.

  1. Disconnect the cable from the negative (-) battery terminal.

  1. Disconnect the cable from the positive (+) battery terminal.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 3 - Positive battery terminal
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 3 or positive battery terminal - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Engine Room No. 1 Relay Block
    *2
    		IG2

  1. Reinstall the ignition relay No. 2 (IG2).

  1. Reconnect the cable to the positive (+) battery terminal.

  1. Reconnect the cable to the negative (-) battery terminal.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION RELAY NO. 2 (IG2) - BATTERY)
OK


11.CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - BODY GROUND)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

  1. Remove the ignition relay No. 2 (IG2) from the engine room No. 1 relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 2 - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *1
    		Engine Room No. 1 Relay Block
    *2
    		IG2

  1. Reinstall the ignition relay No. 2 (IG2).



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION RELAY NO. 2 (IG2) - BODY GROUND)
OK


12.CHECK IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM

  1. Check if the vehicle is equipped with an entry and start system.

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


B
Go to step 15
A


13.CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - IGNITION SWITCH)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

  1. Disconnect the ignition switch connector.

  1. Remove the ignition relay No. 2 (IG2) from the engine room No. 1 relay block.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 1 - E5-6 (IG2)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 1 or E5-6 (IG2) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Engine Room No. 1 Relay Block
    *2
    		IG2
    *3
    		Front view of wire harness connector
    (to Ignition Switch)

  1. Reconnect the ignition switch connector.

  1. Reinstall the ignition relay No. 2 (IG2).



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION RELAY NO. 2 (IG2) - IGNITION SWITCH)
OK


14.INSPECT IGNITION SWITCH ASSEMBLY

  1. Inspect the ignition switch assembly (RAV4_ACA30 RM000000YK001VX.html).



NG
REPLACE IGNITION SWITCH ASSEMBLY (RAV4_ACA30 RM000000YK100WX.html)
OK

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

15.CHECK HARNESS AND CONNECTOR (IGNITION RELAY NO. 2 (IG2) - MAIN BODY ECU)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Ecm Power Source Circuit

  1. Disconnect the main body ECU connector.

  1. Remove the ignition relay No. 2 (IG2) from the engine room No. 1 relay block.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 1 - E19-5 (IG2D)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    Ignition relay No. 2 (IG2) terminal 1 or E19-5 (IG2D) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Engine Room No. 1 Relay Block
    *2
    		IG2
    *3
    		Rear view of wire harness connector
    (to Main Body ECU)

  1. Reconnect the main body ECU connector.

  1. Reinstall the ignition relay No. 2 (IG2).



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION RELAY NO. 2 (IG2) - MAIN BODY ECU)
OK

CHECK ENTRY AND START SYSTEM (RAV4_ACA30 RM000000YEF050X.html)