Toyota Yaris: 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 |
|---|
| Hazard Flasher Switch |
OK:
Normal conditions listed above are displayed.
| OK |
.gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
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| 2. | INSPECT HAZARD WARNING SIGNAL SWITCH ASSEMBLY |
Click here
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| NG |
| 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 |
| OK |
| REPLACE COMBINATION METER ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
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CAUTION / NOTICE / HINT NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration...
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CAUTION / NOTICE / HINT NOTICE:
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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.