| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001GTP2 |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - ] |
| Title: WIPER / WASHER: WIPER AND WASHER SYSTEM (for HV Model): PROBLEM SYMPTOMS TABLE; 2020 - 2025 MY Corolla Corolla HV [01/2019 - ] | ||
PROBLEM SYMPTOMS TABLE
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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![2020 MY Corolla Corolla HV [01/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Front Wiper System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Front wipers do not operate at all |
Proceed to "Wiper and Washer Switch Circuit" |
|
|
Proceed to "Front Wiper Motor Circuit" |
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|
Main body ECU (Multiplex network body ECU) |
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Windshield wiper relay |
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|
Front wipers do not operate in LO |
Proceed to "Wiper and Washer Switch Circuit" |
|
|
Proceed to "Front Wiper Motor Circuit" |
|
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|
Windshield wiper relay |
|
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|
Front wipers do not operate in HI |
Proceed to "Wiper and Washer Switch Circuit" |
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|
Proceed to "Front Wiper Motor Circuit" |
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Windshield wiper relay |
|
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|
Front wipers do not operate in INT |
Proceed to "Wiper and Washer Switch Circuit" |
|
|
Proceed to "Front Wiper Motor Circuit" |
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|
Windshield wiper relay |
|
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|
Front wipers do not operate in MIST |
Proceed to "Wiper and Washer Switch Circuit" |
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Windshield wiper relay |
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When the front wiper switch is in INT, the front wiper intermittent operation interval cannot be adjusted by the intermittent time adjustment switch |
Proceed to "Wiper and Washer Switch Circuit" |
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|
Main body ECU (Multiplex network body ECU) |
|
|
|
When the front wipers are operating in INT, the front wiper intermittent operation interval does not change according to changes in the vehicle speed |
Main body ECU (Multiplex network body ECU) |
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|
Front wipers continuously operate in LO |
Proceed to "Wiper and Washer Switch Circuit" |
|
|
Windshield wiper relay |
|
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|
Front wipers continuously operate in HI |
Proceed to "Wiper and Washer Switch Circuit" |
|
|
Windshield wiper relay |
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|
Front wipers continuously operate in INT |
Proceed to "Wiper and Washer Switch Circuit" |
|
|
Front wipers do not move to the service position (wiper operation is normal) |
Main body ECU (Multiplex network body ECU) |
|
|
When the front wiper switch is turned off, the front wipers do not move to the park position or stop in the wrong position |
Proceed to "Front Wiper Motor Circuit" |
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|
Check the automatic stop (park) position |
|
|
|
Windshield wiper relay |
|
Washer System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Windshield washer motor and pump assembly does not operate |
Proceed to "Wiper and Washer Switch Circuit" |
|
|
Proceed to "Washer Motor Circuit" |
|
|
|
Windshield wiper relay |
|
|
|
Front washers do not operate |
Proceed to "Wiper and Washer Switch Circuit" |
|
|
Windshield wiper relay |
|
|
|
Washer fluid does not flow (Windshield washer motor and pump assembly is normal) |
Washer fluid |
- |
|
Washer hose and nozzle |
- |
Washer Fluid Level Warning System (w/ Level Warning Switch)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
"Windshield Washer Fluid Low" is displayed on the multi-information display when washer fluid level is not low |
Proceed to "Washer Fluid Level Warning Switch Circuit" |
|
|
"Windshield Washer Fluid Low" is not displayed on the multi-information display when washer fluid level is low |
Washer fluid |
- |
|
Proceed to "Washer Fluid Level Warning Switch Circuit" |
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