Toyota Yaris: Lighting System / Hazard Warning Switch Circuit

Toyota Yaris XP210 (2020-2023) 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

-

Body Electrical > Combination Meter > Data List

Tester Display

Hazard Flasher Switch

OK:

Normal conditions listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT HAZARD WARNING SIGNAL SWITCH ASSEMBLY

Click here

NG

REPLACE HAZARD WARNING SIGNAL SWITCH ASSEMBLY

OK

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

OK

REPLACE COMBINATION METER ASSEMBLY

NG

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    Break-In Period

    No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.

    Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.

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