Toyota Yaris: Stop And Start System / Stop and Start Cancel Switch Circuit

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual / Engine & Hybrid System / Stop And Start / Stop And Start System / Stop and Start Cancel Switch Circuit

DESCRIPTION

Stop and start control can be disabled by pressing the stop and start system cancel switch (combination switch assembly). The stop and start system cancel switch (combination switch assembly) is a momentary-type switch that switches between on and off when the switch is pressed. While stop and start control is disabled, the stop and start cancel indicator is illuminated to inform the driver.

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING GTS (STOP&START CANCEL SWITCH)

Powertrain > Stop and Start > Data List

Tester Display
Stop&Start Cancel Switch

(a) Read the value when the stop and start system cancel switch (combination switch assembly) is pressed.

OK:

GTS Display	Condition	Normal Condition
Stop&Start Cancel Switch	Stop and start system cancel switch (combination switch assembly) is pressed	ON
Stop&Start Cancel Switch	Stop and start system cancel switch (combination switch assembly) is not pressed	OFF

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT STOP AND START SYSTEM CANCEL SWITCH (COMBINATION SWITCH ASSEMBLY)

Click here

REPLACE STOP AND START SYSTEM CANCEL SWITCH (COMBINATION SWITCH ASSEMBLY)

3.	CHECK HARNESS AND CONNECTOR (STOP AND START SYSTEM CANCEL SWITCH (COMBINATION SWITCH ASSEMBLY) - BODY GROUND)

(a) Disconnect the H18 stop and start system cancel switch (combination switch assembly) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
H18-5 (E) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - STOP AND START SYSTEM CANCEL SWITCH (COMBINATION SWITCH ASSEMBLY))

(a) Disconnect the H43 engine stop and start ECU connector.

(b) Disconnect the H18 stop and start system cancel switch (combination switch assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
H43-5 (ECAN) - H18-6 (ECU)	Always	Below 1 Ω
H43-5 (ECAN) - Body ground and other terminals	Always	10 kΩ or higher
H18-6 (ECU) - Body ground and other terminals	Always	10 kΩ or higher

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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