Sfi System Mil Circuit

Engine. Camry. Acv40 Gsv40
2Az-Fe Engine Control System. Camry. Acv40 Gsv40

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 MIL IS ILLUMINATED

CHECK THAT ENGINE STARTS

INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT)

SFI SYSTEM - MIL Circuit


DESCRIPTION

The MIL (Malfunction Indicator Lamp) is used to indicate vehicle malfunction detected by the ECM. When the ignition switch is turned to the ON position, 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 the ON position, the MIL should be illuminated and should then turn off. If the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the intelligent tester.

WIRING DIAGRAM


Camry. Acv40 Gsv40.2Az-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 table below.

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


B
Go to step 5
A


2.CHECK WHETHER MIL TURNS OFF

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position and turn the tester on.

  1. Select the following menu items: Powertrain / Engine and ECT / DTC.

  1. Check if any DTCs have been stored. Note down any DTCs.

  1. Clear the DTCs (CAMRY_ACV40 RM000000PDK081X.html).

  1. Check if the MIL goes off.

    Standard:
    MIL goes off.


OK
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
NG


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


    Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Mil Circuit

  1. Disconnect the A24 ECM connector.

  1. Turn the ignition switch to the ON position.

  1. Check that the MIL is not illuminated.

    OK:
    MIL is not illuminated.

  1. Reconnect the ECM connector.



OK
REPLACE ECM
NG


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


    Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Mil Circuit

  1. Disconnect the F2 combination meter connector.

  1. Disconnect the A24 ECM connector.

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

    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    W (A24-24) or CHK (F2-4) - Body ground
    		10 kΩ or higher

  1. Reconnect the combination meter connector.

  1. Reconnect the ECM connector.



OK
REPAIR OR REPLACE COMBINATION METER ASSEMBLY
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK THAT MIL IS ILLUMINATED

  1. Check if the MIL is illuminated when the ignition switch is turned to the ON position.

    OK:
    MIL is illuminated.


OK
SYSTEM OK
NG


6.CHECK THAT ENGINE STARTS

  1. Turn the ignition switch to the ON position.

  1. Start the engine.

    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
A


7.INSPECT COMBINATION METER ASSEMBLY (MIL CIRCUIT)

  1. Check the MIL circuit (CAMRY_ACV40 RM0000012GB029X.html).



NG
REPAIR OR REPLACE COMBINATION METER ASSEMBLY
OK

CHECK AND REPLACE HARNESS AND CONNECTOR (COMBINATION METER - ECM)