Toyota Yaris: Sfi System / MIL Circuit

Toyota Yaris XP210 (2020-2026) 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

CHECK FOR INTERMITTENT PROBLEMS

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

GO TO VC OUTPUT CIRCUIT

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.

REPAIR CIRCUIT INDICATED BY OUTPUT

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

REPLACE ECM

REPLACE COMBINATION METER ASSEMBLY

Brake Override System

DESCRIPTION When the vehicle is being driven, depressing the accelerator pedal sensor assembly and brake pedal will activate the brake override system to restrict engine output...

Ignition Circuit

DESCRIPTION A direct ignition system is used on this vehicle. The direct ignition system is a 1 cylinder ignition system which ignites one cylinder with one ignition coil...

Other information:

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Front Recognition Camera Optical Axis Misalignment Malfunction (C1AA800)

DESCRIPTION The forward recognition camera monitors its optical axis status. If it determines that the optical axis alignment has become misaligned, it will store DTC C1AA800. DTC No. Detection Item DTC Detection Condition Trouble Area C1AA800 Front Recognition Camera Optical Axis Misalignment Malfunction When the forward recognition camera detects an optical axis misalignment when the vehicle is being driven at a speed of 5 km/h (4 mph) or more, after 2 seconds have elapsed since the ignition switch was turned ON...

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: After Engine Stops due to Stop and Start System, Engine does not Restart

DESCRIPTION This is the troubleshooting procedure for situations where the engine does not restart after having been stopped by the stop and start system. For information on stop and start control, refer to the system description. Click here CAUTION / NOTICE / HINT PRECAUTIONS WHEN THE ENGINE STOP AND START ECU AND THE STARTER ASSEMBLY ARE REPLACED NOTICE: When the engine stop and start ECU is replaced, it is necessary to read the number of starter operations before replacement and store this number in the new engine stop and start ECU after replacement, and to perform external backup boost converter (eco run vehicle converter assembly) existence learning...