Toyota Yaris: Lighting System / Hazard Warning Switch Circuit

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System / Hazard Warning Switch Circuit

DESCRIPTION

The combination meter assembly receives the hazard warning signal switch assembly on signal and controls the operation of the hazard warning lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.	READ VALUE USING GTS

(a) Enter the following menus: Body Electrical / Combination Meter / Data List.

(b) Read the Data List according to the display on the GTS.

Body Electrical > Combination Meter > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Hazard Flasher Switch	Hazard warning signal switch signal	OFF or ON	OFF: Hazard warning signal switch off ON: Hazard warning signal switch on	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Hazard Flasher Switch

Hazard warning signal switch signal

OFF or ON

OFF: Hazard warning signal switch off

ON: Hazard warning signal switch on

Body Electrical > Combination Meter > Data List

Tester Display
Hazard Flasher Switch

OK:

Normal conditions listed above are displayed.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT HAZARD WARNING SIGNAL SWITCH ASSEMBLY

Click here

REPLACE HAZARD WARNING SIGNAL SWITCH ASSEMBLY

3.	CHECK HARNESS AND CONNECTOR (HAZARD WARNING SIGNAL SWITCH ASSEMBLY - COMBINATION METER ASSEMBLY AND BODY GROUND)

(a) Disconnect the H7 combination meter assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
H59-5 (TB) - H7-17 (HAZ)	Always	Below 1 Ω
H59-5 (TB) or H7-17 (HAZ) - Body ground	Always	10 kΩ or higher
H59-4 (E) - Body ground	Always	Below 1 Ω

REPLACE COMBINATION METER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

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