Lexus ES: 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
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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 TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) Read the Data List according to the display on the Techstream.
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 |
(a) Remove the hazard warning signal switch assembly.
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(b) Inspect the hazard warning signal switch assembly.
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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 G16 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| G24-6 (HAZ) - G16-2 (HZSW) | Always | Below 1 Ω |
| G24-6 (HAZ) or G16-2 (HZSW) - Body ground | Always | 10 kΩ or higher |
| G24-3 (E) - Body ground | Always | Below 1 Ω |
| OK | | REPLACE COMBINATION METER ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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