Toyota Yaris: Sfi System / MIL Circuit

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / MIL Circuit

DESCRIPTION

The Malfunction Indicator Lamp (MIL) is used to indicate vehicle malfunctions detected by the ECM.

The MIL operation can be checked visually. When the ignition switch is first turned to ON, the MIL should be illuminated and should then turn off after the engine is started. If the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the GTS.

WIRING DIAGRAM

PROCEDURE

1.

CHECK THAT MIL IS ILLUMINATED

(a) Perform troubleshooting in accordance with the table below.

MIL

Condition

Proceed to

Illuminates → Turns off

Ignition switch ON → engine is started

A

Other than above

-

B

A

CHECK FOR INTERMITTENT PROBLEMS

B

2.

CHECK COMMUNICATION BETWEEN GTS AND ECM

(a) Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.

Result

Proceed to

Communication is possible

A

Communication is not possible

B

B

GO TO VC OUTPUT CIRCUIT

A

3.

CHECK WHETHER DTC OUTPUT RECURS

(a) Perform the Health Check using the GTS.

(b) Check if any DTCs have been detected. Note down any DTCs.

Result

Proceed to

DTCs are not output

A

Any DTCs is output

B

HINT:

Check for detected DTCs output from other ECUs which relate to the MIL.

B

REPAIR CIRCUIT INDICATED BY OUTPUT

A

4.

PERFORM ACTIVE TEST USING GTS

(a) Check the status of the MIL while performing the Active Test.

Body Electrical > Combination Meter > Active Test

Tester Display

Check Engine Warning

Result

Proceed to

Changes

A

Does not change

B

A

REPLACE ECM

B

REPLACE COMBINATION METER ASSEMBLY

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