Toyota Yaris: Wiper And Washer System / Front Wiper Motor Circuit
DESCRIPTION
The windshield wiper relay assembly controls the windshield wiper motor assembly through this circuit.
WIRING DIAGRAM
PROCEDURE
| 1. | PERFORM ACTIVE TEST USING GTS (FRONT WIPER LO OPERATION / FRONT WIPER HI OPERATION) |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Main Body > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| Front Wiper Lo Operation | Function to operate the windshield wiper motor assembly in LO | OFF or ON | - |
| Front Wiper Hi Operation | Function to operate the windshield wiper motor assembly in HI | OFF or ON | - |
| Tester Display |
|---|
| Front Wiper Lo Operation |
| Tester Display |
|---|
| Front Wiper Hi Operation |
OK:
Windshield wiper motor assembly operates normally.
| OK |
.gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
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| 2. | INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY |
Click here
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| NG |
| REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - WINDSHIELD WIPER MOTOR ASSEMBLY) |
(a) Disconnect the A50 and A49 windshield wiper relay assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A50-2 (+1) - A43-1 (+1) | Always | Below 1 Ω |
| A50-4 (+2) - A43-4 (+2) | Always | Below 1 Ω |
| A49-6 (+SM) - A43-3 (+S) | Always | Below 1 Ω |
| A50-2 (+1) or A43-1 (+1) - Body ground | Always | 10 kΩ or higher |
| A50-4 (+2) or A43-4 (+2) - Body ground | Always | 10 kΩ or higher |
| A49-6 (+SM) or A43-3 (+S) - Body ground | Always | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER MOTOR ASSEMBLY - BODY GROUND) |
| *a | Front view of wire harness connector (to Windshield Wiper Motor Assembly) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A43-5 (E) - Body ground | Always | Below 1 Ω |
| OK |
| REPLACE WINDSHIELD WIPER RELAY ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
Wiper Module Missing Message (B235787)
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Wiper and Washer Switch Circuit
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CAUTION / NOTICE / HINT NOTICE: If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration...
Other information:
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: How To Proceed With Troubleshooting
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Front Seat Belt Pretensioners
The front seat belt pretensioners are designed to deploy in moderate or severe frontal, near frontal collisions.
In addition, the pretensioners operate when a side collision or a rollover accident is detected. The pretensioners operate differently depending on what types of air bags are equipped. For more details about the seat belt pretensioner operation, refer to the SRS Air Bag Deployment Criteria.
