| Last Modified: 06-05-2026 | 6.11:8.1.0 | Doc ID: RM100000001GTP8 |
| Model Year Start: 2020 | Model: Corolla HV | Prod Date Range: [01/2019 - ] |
| Title: WIPER / WASHER: WIPER AND WASHER SYSTEM (for HV Model): Front Wiper Motor Circuit; 2020 - 2026 MY Corolla HV [01/2019 - ] | ||
|
Front Wiper Motor Circuit |
DESCRIPTION
The windshield wiper relay controls the windshield wiper motor assembly through this circuit.
WIRING DIAGRAM
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 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 |
- |
Body Electrical > Main Body > Active Test
Body Electrical > Main Body > Active Test
OK:
Windshield wiper motor assembly operates normally.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
|
2. |
INSPECT WINDSHIELD WIPER MOTOR ASSEMBLY |
(a) Remove the windshield wiper motor assembly.
Click here
![2020 MY Corolla Corolla Hatchback Corolla HV [01/2019 - 09/2019]; WIPER / WASHER: FRONT WIPER MOTOR: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Inspect the windshield wiper motor assembly.
Click here
| NG |
|
REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY Click here
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY - WINDSHIELD WIPER MOTOR ASSEMBLY) |
(a) Disconnect the A55 and A56 windshield wiper relay connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A55-2 (+1) - A31-1 (+1) |
Always |
Below 1 Ω |
|
A55-4 (+2) - A31-4 (+2) |
Always |
Below 1 Ω |
|
A56-6 (+SM) - A31-3 (+S) |
Always |
Below 1 Ω |
|
A55-2 (+1) or A31-1 (+1) - Body ground |
Always |
10 kΩ or higher |
|
A55-4 (+2) or A31-4 (+2) - Body ground |
Always |
10 kΩ or higher |
|
A56-6 (+SM) or A31-3 (+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) Measure the resistance according to the value(s) in the table below.
Standard Resistance
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A31-5 (E) - Body ground |
Always |
Below 1 Ω |
|
|
|
|