| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001GTP7 |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: WIPER / WASHER: WIPER AND WASHER SYSTEM (for HV Model): B2357; Lost Communication with Wiper Module; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
|
DTC |
B2357 |
Lost Communication with Wiper Module |
DESCRIPTION
The main body ECU (multiplex network body ECU) and windshield wiper relay communicate via CXPI communication. The main body ECU (multiplex network body ECU) stores this DTC if communication becomes abnormal.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Memory |
DTC Output from |
|---|---|---|---|---|---|
|
B2357 |
Lost Communication with Wiper Module |
Detection condition:
Malfunction Status:
Malfunction Time:
|
|
○ |
Main Body |
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. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Disconnect the A56 windshield wiper relay connector.
(b) Disconnect the I84 main body ECU (multiplex network body ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A56-4 (MPX1) - I84-5 (CXP1) |
Always |
Below 1 Ω |
|
A56-4 (MPX1) or I84-5 (CXP1) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
*a |
Component without harness connected (Main Body ECU (Multiplex Network Body ECU) |
(a) Check for voltage and pulses according to the value(s) in the table below.
Standard Voltage and Pulse:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I84-5 (CXP1) - Body ground |
Power switch on (IG) |
Pulse generation |
|
Power switch off |
Below 1 V |
| NG |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
|
|
3. |
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 |
|---|---|---|---|
|
Wiper Power Relay |
Function to operate the IG1 NO. 3 relay |
OFF or ON |
- |
Body Electrical > Main Body > Active Test
|
Tester Display |
|---|
|
Wiper Power Relay |
OK:
IG1 NO. 3 relay operates normally.
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY - BODY GROUND) |
(a) Disconnect the A55 windshield wiper relay connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A55-3 (E) - Body ground |
Always |
Below 1 Ω |
|
A56-5 (ES) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE - WINDSHIELD WIPER RELAY) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A55-8 (+B) - Body ground |
Power switch on (IG) |
11 to 14 V |
|
Less than approximately 60 seconds after power switch turned off |
11 to 14 V |
|
|
Approximately 60 seconds or more after power switch turned off |
Below 1 V |
| OK |
|
REPLACE WINDSHIELD WIPER RELAY
|
|
|
6. |
INSPECT NO. 1 INTEGRATION RELAY |
(a) Remove the No. 1 integration relay.
Click here
(b) Inspect the No. 1 integration relay.
Click here
| NG |
|
REPLACE NO. 1 INTEGRATION RELAY
|
|
|
7. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE - NO. 1 INTEGRATION RELAY) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2A-4 - Body ground |
Power switch off |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY - NO. 1 INTEGRATION RELAY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A55-8 (+B) - 2A-3 |
Always |
Below 1 Ω |
|
A55-8 (+B) or 2A-3 - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
9. |
INSPECT NO. 1 INTEGRATION RELAY |
(a) Remove the No. 1 integration relay.
Click here
(b) Inspect the No. 1 integration relay.
Click here
| NG |
|
REPLACE NO. 1 INTEGRATION RELAY
|
|
|
10. |
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Disconnect the I85 main body ECU (multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2A-2 - I85-21 (WPS) |
Always |
Below 1 Ω |
|
2A-2 or I85-21 (WPS) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
11. |
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - BODY GROUND) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2A-1 - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|