Lexus NX: Hazard Warning Switch Circuit
DESCRIPTION
When the combination meter receives a hazard warning signal switch signal, the flasher IC turns on and hazard control is performed.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the combination meter assembly, make sure to replace it with a new one.
PROCEDURE
| 1. | READ VALUE USING TECHSTREAM (HAZARD FLASHER SWITCH) |
(a) Using the Techstream, read the Data List.
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| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Hazard Flasher Switch | Hazard warning signal switch signal | ON or OFF | ON: Hazard switch on OFF: Hazard switch off | - |
| Tester Display |
|---|
| Hazard Flasher Switch |
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
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| 2. | INSPECT AIR CONDITIONING CONTROL ASSEMBLY (HAZARD WARNING SWITCH) |
(a) Remove the air conditioning control assembly (hazard warning switch).
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(b) Inspect the air conditioning control assembly (hazard warning switch).
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| NG | | REPLACE AIR CONDITIONING CONTROL ASSEMBLY (HAZARD WARNING SIGNAL SWITCH) |
|
| 3. | CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL ASSEMBLY [HAZARD WARNING SWITCH] - COMBINATION METER ASSEMBLY) |
(a) Disconnect the I13 air conditioning control assembly (hazard warning switch) connector.
(b) Disconnect the I11 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I13-9 (HAZ) - I11-2 (HZSW) | Always | Below 1 Ω |
| I13-11 (LJB) - I11-12 (HAZM) | Always | Below 1 Ω |
| I13-14 (GND) - Body ground | Always | Below 1 Ω |
| I13-9 (HAZ) or I11-2 (HZSW) - Body ground | Always | 10 kΩ or higher |
| I13-11 (LJB) or I11-12 (HAZM) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE COMBINATION METER ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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SEE MORE:
Operation Check
OPERATION CHECK CHECK WINDOW DEFOGGER SYSTEM (a) Turn the power switch on (IG). (b) Check that the rear window defogger becomes warm by operating the rear window defogger switch of the air conditioning control assembly. (c) When the vehicle is stopped, confirm that the rear window defogger stops aft
Precaution
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