Toyota Corolla Cross: 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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PROCEDURE
|
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 |
- |
|
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 |
HINT:
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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 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 (HAZSW) |
Always | Below 1 Ω |
|
I38-6 (HAZ) - Body ground |
Always | 10 kΩ or higher |
|
I4-12 (HAZSW) - Body ground |
Always | 10 kΩ or higher |
|
I38-3 (E) - Body ground |
Always | Below 1 Ω |
| OK | | REPLACE COMBINATION METER ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
