Sfi System Mil 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 THAT MIL IS ILLUMINATED

CHECK WHETHER MIL TURNS OFF

CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)

CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)

CHECK THAT ENGINE STARTS

CHECK COMBINATION METER ASSEMBLY

CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)

SFI SYSTEM - MIL Circuit


DESCRIPTION

The MIL (Malfunction Indicator Lamp) is used to indicate the detection of vehicle malfunctions by the ECM. When the ignition switch is turned to ON, power is supplied to the MIL circuit and the ECM provides the circuit ground which illuminates the MIL.
The MIL operation can be checked visually. When the ignition switch is first turned to ON, the MIL turns on and then off. If the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the intelligent tester.

WIRING DIAGRAM


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


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK THAT MIL IS ILLUMINATED

  1. Turn the ignition switch to ON.

  1. Check the illumination condition of the MIL.

    Result
    Condition
    		Proceed to
    MIL remains illuminated (Even after ignition switch turned to ON and several seconds have passed, MIL still remains illuminated)
    		A
    MIL remains off (Does not illuminate at all)
    		B
    MIL illuminates for several seconds, but turns off after engine is started
    		C


B
Go to step 5

C
SYSTEM OK
A


2.CHECK WHETHER MIL TURNS OFF

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Check if any DTCs are output. Note down any DTCs.

  1. Clear the DTCs (RAV4_ACA30 RM000000PDK0WCX.html).

  1. Check if the MIL goes off.

    OK:
    MIL goes off.


NG
Go to step 3
OK

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (RAV4_ACA30 RM000000PDF0FMX.html)

3.CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)


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

  1. Disconnect the ECM connector.

  1. Turn the ignition switch to ON.

  1. Check that the MIL is not illuminated.

    OK:
    MIL is not illuminated.
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.



NG
Go to step 4
OK

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)

4.CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)


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

  1. Disconnect the combination meter connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    E22-8 (EFI) or A12-24 (W) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Combination Meter)
    *2
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the combination meter connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - ECM)
OK

REPLACE COMBINATION METER (RAV4_ACA30 RM000001RH400AX.html)

5.CHECK THAT ENGINE STARTS

  1. Turn the ignition switch to ON.

  1. Check that the engine starts.

    Result
    Result
    		Proceed to
    Engine starts
    		A
    Engine does not start*
    		B
    HINT:
    *: The intelligent tester cannot communicate with the ECM.


B
GO TO VC OUTPUT CIRCUIT (RAV4_ACA30 RM000001D6V0L7X.html)
A


6.CHECK COMBINATION METER ASSEMBLY


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

  1. Disconnect the ECM connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A12-24 (W) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to ECM)


NG
Go to step 7
OK

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)

7.CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)


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

  1. Disconnect the combination meter connector.

  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
    E22-8 (EFI) - A12-24 (W)
    		Always
    		Below 1 Ω
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Combination Meter)
    *2
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.

  1. Reconnect the combination meter connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - ECM)
OK

REPLACE COMBINATION METER (RAV4_ACA30 RM000001RH400AX.html)