СИСТЕМА SFI > Цепь контрольной лампы неисправности MIL

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DESCRIPTION

The Malfunction Indicator Lamp (MIL) is used to indicate the ECM's detection of a vehicle malfunction.
The instrument panel GAUGE fuse provides the circuit with power and the ECM provides the circuit ground that illuminates the MIL.
MIL operations should be checked visually:
The MIL should be illuminated when the engine switch is turned on (IG). If the MIL is always ON or OFF, use the intelligent tester and follow the procedures below to determine the cause of the problem.
If the ECM detects trouble, the MIL illuminates. At this time, the ECM records a DTC in the memory.

WIRING DIAGRAM


A147879E01


INSPECTION PROCEDURE

1.CHECK THAT MIL IS ILLUMINATED

  1. Turn the engine switch on (IG).

  1. Check the illumination of the MIL.

    Result:

    Result
    		Proceed to
    MIL remains illuminated
    (Even after engine switch is turned on (IG) 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
Перейдите к шагу 5

C
SYSTEM OK
A


2.CHECK IF MIL TURNS OFF

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the tester ON.

  1. Check if DTCs have been stored (see page Нажмите здесь). If DTCs are present, write them down.

  1. Clear the DTCs (see page Нажмите здесь).

  1. Check that the MIL turns off.

    OK:
    MIL turns off.



OK
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (Нажмите здесь)
NG


3.CHECK HARNESS AND CONNECTOR (FOR SHORT)
A152669E01

  1. Disconnect the A14 ECM connector.

  1. Turn the engine switch on (IG).

  1. Check that the MIL is not illuminated.

    OK:
    MIL is not illuminated.



OK
REPLACE ECM (Нажмите здесь)
NG


4.CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)
A152670E03

  1. Disconnect the L10 combination meter connector.

  1. Disconnect the A14 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L10-11 (EFI) - A14-11 (W)
    		Always
    		Below 1 Ω
    L10-11 (EFI) or A14-11 (W) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPAIR OR REPLACE COMBINATION METER (Нажмите здесь)  

5.CHECK THAT ENGINE STARTS

  1. Start the engine.

    Result:

    Result
    		Proceed to
    Engine starts
    		A
    Engine does not start*
    		B

    УКАЗАНИЕ:
    *: The intelligent tester cannot communicate with the ECM.



B
GO TO VC OUTPUT CIRCUIT (Нажмите здесь)
A


6.CHECK HARNESS AND CONNECTOR (COMBINATION METER - BODY GROUND)
A152669E01

  1. Disconnect the A14 ECM connector.

  1. Turn the engine switch on (IG).

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

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A14-11 (W) - Body ground
    		Engine switch on (IG)
    		11 to 14 V



OK
REPLACE ECM (Нажмите здесь)
NG


7.CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)
A152670E02

  1. Disconnect the L10 combination meter connector.

  1. Disconnect the A14 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L10-11 (EFI) - A14-11 (W)
    		Always
    		Below 1 Ω
    L10-11 (EFI) or A14-11 (W) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPAIR OR REPLACE COMBINATION METER (Нажмите здесь)