Toyota Yaris: Wiper And Washer System / Washer Motor Circuit
DESCRIPTION
When the windshield washer motor and pump assembly receives signals from the windshield wiper switch assembly, it operates to spray washer fluid from the washer nozzle sub-assemblies.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses of circuits related to this system before performing the following procedure.
HINT:
The wiper and washer system uses the CXPI communication system. First, confirm that there is no malfunction in the CXPI communication system.
PROCEDURE
| 1. | PERFORM ACTIVE TEST USING GTS (FRONT WASHER RELAY) |
(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 Washer Relay | Function to operate the windshield washer motor and pump assembly (Front) | OFF or ON | - |
| Tester Display |
|---|
| Front Washer Relay |
OK:
Windshield washer motor and pump assembly operates normally.
| OK |
.gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
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| 2. | INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY |
Click here
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| NG |
| REPLACE WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (POWER SOURCE - WINDSHIELD WIPER RELAY ASSEMBLY) |
(a) Disconnect the A50 windshield wiper relay assembly connector.
| (b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. | CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A50-5 (EWS) - Body ground | Always | Below 1 Ω |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. | CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A50-1 (+WR) - A44-1 (B) | Always | Below 1 Ω |
| A50-7 (-WR) - A44-2 (SW) | Always | Below 1 Ω |
| A50-1 (+WR) or A44-1 (B) - Body ground | Always | 10 kΩ or higher |
| A50-7 (-WR) or A44-2 (SW) - Body ground | Always | 10 kΩ or higher |
| OK |
| REPLACE WINDSHIELD WIPER RELAY ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
Wiper and Washer Switch Circuit
DESCRIPTION The condition of the windshield wiper switch assembly is detected and sent to the steering sensor in this circuit. WIRING DIAGRAM
CAUTION / NOTICE / HINT NOTICE: If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration...
Wiper Ecu
..
Other information:
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Liftgate/Trunk Lid
WARNING
Never allow a person to ride in the luggage compartment/trunk
Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open
