| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001GTPA |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: WIPER / WASHER: WIPER AND WASHER SYSTEM (for HV Model): Washer Motor Circuit; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
|
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.
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
![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)
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter following menus: Body Electrical / Main Body / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
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 |
- |
Body Electrical > Main Body > Active Test
|
Tester Display |
|---|
|
Front Washer Relay |
OK:
Windshield washer motor and pump assembly operates normally.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
|
2. |
INSPECT WINDSHIELD WASHER MOTOR AND PUMP ASSEMBLY |
(a) Remove the windshield washer motor and pump assembly.
Click here
(b) Inspect the windshield washer motor and pump assembly.
Click here
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE - WINDSHIELD WIPER RELAY) |
(a) Disconnect the A55 windshield wiper relay connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A55-6 (IGWS) - Body ground |
Power switch on (IG) |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A55-5 (EWS) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY - 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 |
|---|---|---|
|
A55-1 (+WR) - A35-1 (B) |
Always |
Below 1 Ω |
|
A55-7 (-WR) - A35-2 (SW) |
Always |
Below 1 Ω |
|
A55-1 (+WR) or A35-1 (B) - Body ground |
Always |
10 kΩ or higher |
|
A55-7 (-WR) or A35-2 (SW) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE WINDSHIELD WIPER RELAY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|