| Last Modified: 06-05-2026 | 6.11:8.1.0 | Doc ID: RM1000000028JQ7 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM: Hazard Warning Switch Circuit; 2023 - 2026 MY GR Corolla Corolla Corolla Hatchback Corolla HV [11/2022 - ] | ||
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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.
-
When replacing the combination meter assembly, update the ECU security key.
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![2023 - 2026 MY GR Corolla Corolla Corolla Hatchback Corolla HV [09/2022 - ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: UPDATE ECU SECURITY KEY](/t3Portal/stylegraphics/info.gif)
PROCEDURE
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1. |
READ VALUE USING GTS |
(a) 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
OK:
Normal conditions listed above are displayed.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
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2. |
INSPECT HAZARD WARNING SIGNAL SWITCH ASSEMBLY |
Click here
| NG |
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3. |
CHECK HARNESS AND CONNECTOR (HAZARD WARNING SIGNAL SWITCH ASSEMBLY - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the I4 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I38-6 (HAZ) - I4-12 (HZSW) |
Always |
Below 1 Ω |
|
I38-6 (HAZ) or I4-12 (HZSW) - Body ground |
Always |
10 kΩ or higher |
|
I38-3 (E) - Body ground |
Always |
Below 1 Ω |
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