| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001GTP3 |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: WIPER / WASHER: WIPER AND WASHER SYSTEM (for HV Model): TERMINALS OF ECU; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
TERMINALS OF ECU
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
(a) Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
(b) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
4F-3 - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
4B-1 - Body ground |
B - Body ground |
Auxiliary battery power supply |
Power switch off |
11 to 14 V |
|
4D-1 - Body ground |
B-R - Body ground |
Auxiliary battery power supply |
Power switch off |
11 to 14 V |
(c) Connect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
(d) Measure the voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I84-5 (CXP1) - Body ground |
BR - Body ground |
CXPI communication line |
Power switch on (IG) |
Pulse generation |
|
I85-21 (WPS) - Body ground |
R - Body ground |
IG1 NO. 3 Relay operation signal |
Power switch on (IG) |
11 to 14 V |
|
Less than approximately 60 seconds after power switch turned off |
||||
|
Approximately 60 seconds or more after power switch turned off |
Below 1 V |
CHECK WINDSHIELD WIPER RELAY
(a) Disconnect the A55 and A56 windshield wiper relay connectors.
(b) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
A55-3 (E) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
A55-5 (EWS) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
A55-6 (IGWS) - Body ground |
L - Body ground |
Washer circuit IG power source |
Power switch off |
Below 1 V |
|
Power switch on (IG) |
11 to 14 V |
|||
|
A55-8 (+B) - Body ground |
B - Body ground |
Power switch on (IG) signal (Power source circuit) |
Power switch on (IG) |
11 to 14 V |
|
Less than approximately 60 seconds after power switch turned off |
||||
|
Approximately 60 seconds or more after power switch turned off |
Below 1 V |
|||
|
A56-5 (ES) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Connect the A55 and A56 windshield wiper relay connectors.
(d) Measure the voltage and resistance and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
A55-1 (+WR) - Body ground |
G - Body ground |
Front washer operation signal |
Power switch on (IG), front washer operating |
11 to 14 V |
|
A55-2 (+1) - Body ground |
R - Body ground |
LO operation signal to windshield wiper motor assembly |
Power switch on (IG), windshield wiper motor assembly operating in LO |
11 to 14 V |
|
A55-4 (+2) - Body ground |
W - Body ground |
HI operation signal to windshield wiper motor assembly |
Power switch on (IG), windshield wiper motor assembly operating in HI |
11 to 14 V |
|
A55-7 (-WR) - Body ground |
W - Body ground |
Ground |
Always |
Below 1 Ω |
|
A56-3 (2S) - Body ground |
V - Body ground |
Windshield wiper motor assembly HI operation signal |
Windshield wiper motor assembly stopped |
4.5 to 5.5 V |
|
Windshield wiper motor assembly operating in HI |
Below 1 V |
|||
|
A56-4 (MPX1) - Body ground |
P - Body ground |
CXPI communication line |
Power switch on (IG) |
Pulse generation |
|
Less than approximately 100 seconds after power switch turned off |
||||
|
Approximately 100 seconds or more after power switch turned off |
11 to 14 V |
|||
|
A56-6 (+SM) - Body ground |
G - Body ground |
Windshield wiper motor assembly position detection signal |
Windshield wiper motor assembly in LO or HI operation |
Below 1 V ←→ 11 to 14V |
|
Windshield wiper motor assembly stopped |
Below 1 V |
CHECK COMBINATION METER ASSEMBLY (w/ Level Warning Switch)
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![2020 MY Corolla Corolla HV [01/2019 - 04/2020]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for HV Model): TERMINALS OF ECU](/t3Portal/stylegraphics/info.gif)
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