Toyota Camry (XV70): Lost Communication with Wiper System LIN BUS (B1373)
DESCRIPTION
The main body ECU (multiplex network body ECU) and windshield wiper motor assembly communicate via LIN 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 |
|---|---|---|---|---|---|
|
B1373 | Lost Communication with Wiper System LIN BUS | Detection condition:
|
| ○ |
Main Body |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*
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- *: w/ Smart Key System
PROCEDURE
|
1. | CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - WINDSHIELD WIPER MOTOR ASSEMBLY) |
(a) Disconnect the K51 main body ECU (multiplex network body ECU) connector.
(b) Disconnect the A31 windshield wiper motor assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
K51-3 (LIN3) or A31-2 (LIN) - Body ground |
Always | 10 kΩ Higher |
| NG | .gif) |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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|
2. | CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
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|
*a | Component without harness connected (Main Body ECU (Multiplex Network Body ECU) |
(a) Check for pulses according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
K51-3 (LIN3) - Body ground |
Ignition switch off |
Below 1 V |
|
Ignition switch ON |
Pulse generation |
| OK | |
REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY |
| NG | |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
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On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE
1. SECURE VEHICLE (a) Fully apply the parking brake and chock a wheel.
CAUTION:
Make sure to apply the parking brake and chock a wheel before performing this procedure.
If the vehicle is not secure and the shift lever is moved to N, the vehicle may sudden
Precaution
PRECAUTION
NOTICE:
This vehicle is equipped with an SRS (Supplemental Restraint System). Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing. This may cause a serious accident. Before servicing (including inspection, repla
