Sfi System Mil Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK THAT MIL IS ILLUMINATED

CHECK IF MIL TURNS OFF

CHECK HARNESS AND CONNECTOR (FOR SHORT)

CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER)

CHECK IF MIL ILLUMINATES

CHECK THAT ENGINE STARTS

INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT)

SFI SYSTEM - MIL Circuit


DESCRIPTION

The MIL is used to inform the user when the ECM has detected a vehicle malfunction.
By turning the ignition switch ON, power is supplied to the MIL circuit, and the ECM provides the circuit ground that illuminates the MIL.
Operation of the MIL should be checked visually:
When the ignition switch is first turned ON, the MIL should illuminate. When the engine is started, the MIL should turn off.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Tr-Fe Engine Control System.Sfi System.Sfi System Mil Circuit


INSPECTION PROCEDURE

1.CHECK THAT MIL IS ILLUMINATED

  1. Perform troubleshooting in accordance with the chart below.

    Result:
    Condition
    		Proceed to
    MIL remains ON
    		A
    MIL does not illuminate
    		B


B
Go to step 5
A


2.CHECK IF MIL TURNS OFF

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON and turn the intelligent tester ON.

  1. Check if DTCs have been stored (Toyota Fortuner RM000000ZPW007X.html). If DTCs are present, write them down.

  1. Clear the DTCs using the intelligent tester (Toyota Fortuner RM000000ZPW007X.html).

  1. Check that the MIL turns off.

    OK:
    The MIL turns off.


OK
REPAIR CIRCUIT INDICATED BY OUTPUT DTC
NG


3.CHECK HARNESS AND CONNECTOR (FOR SHORT)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Tr-Fe Engine Control System.Sfi System.Sfi System Mil Circuit

  1. Disconnect the E9 ECM connector.

  1. Turn the ignition switch ON.

  1. Check that the MIL is not illuminated.

    OK:
    The MIL is not illuminated.


OK
REPLACE ECM
NG


4.CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.2Tr-Fe Engine Control System.Sfi System.Sfi System Mil Circuit

  1. Disconnect the E9 ECM connector.

  1. Disconnect the C10 combination meter connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    E9-30 (W) - C10-39
    		Below 1 Ω
    E9-30 (W) or C10-39 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE COMBINATION METER ASSEMBLY

5.CHECK IF MIL ILLUMINATES

  1. Check that the MIL illuminates when turning the ignition switch ON.

    OK:
    The MIL illuminates.


OK
NORMAL
NG


6.CHECK THAT ENGINE STARTS

  1. Turn the ignition switch ON.

  1. Start the engine.

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
A


7.INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT)

  1. See the combination meter troubleshooting procedure (Toyota Fortuner RM0000011IT006X.html).



NG
REPAIR OR REPLACE BULB OR COMBINATION METER ASSEMBLY
OK

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