DTC Code | DTC Name |
---|---|
B1373 | Lost Communication with Wiper System LIN BUS |
DESCRIPTION
The main body ECU (multiplex network body ECU) communicates with the windshield wiper motor assembly, windshield wiper switch assembly and rain sensor via LIN communication. If a malfunction occurs in the LIN communication line and a communication error occurs, this DTC is stored.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory | DTC Output from |
---|---|---|---|---|---|
B1373 | Lost Communication with Wiper System LIN BUS |
DTC Detection Condition:
Malfunction Status:
Malfunction Duration: |
|
○ | Main body ECU (multiplex network body ECU) |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
PROCEDURE
CHECK FOR DTC
Clear the DTCs.
Turn the power switch on (IG) and wait for at least 10 seconds.
Check for DTCs.
OK |
---|
DTC B1373 is not output |
Result | |||
---|---|---|---|
|
OK |
USE SIMULATION METHOD TO CHECK Click here |
NG |
CHECK RAIN SENSOR
Disconnect the Z8*1 or a4*2 rain sensor connector.
*1: w/ Pre-collision System
*2: w/o Pre-collision System
Clear the DTCs.
Turn the power switch on (IG) and wait for at least 10 seconds.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
A |
REPLACE RAIN SENSOR Click here |
B |
CHECK WINDSHIELD WIPER MOTOR ASSEMBLY
Disconnect the u1 windshield wiper motor assembly connector.
Clear the DTCs.
Turn the power switch on (IG) and wait for at least 10 seconds.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
A |
REPLACE WINDSHIELD WIPER MOTOR ASSEMBLY Click here |
B |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - RAIN SENSOR)
Disconnect the P8 main body ECU (multiplex network body ECU) connector.
Disconnect the Z8*1 or a4*2 rain sensor connector.
*1: w/ Pre-collision System
*2: w/o Pre-collision System
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
||||||
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - WINDSHIELD WIPER MOTOR ASSEMBLY AND RAIN SENSOR)
Disconnect the P8 main body ECU (multiplex network body ECU) connector.
Disconnect the u1 windshield wiper motor assembly connector.
Disconnect the Z8*1 or a4*2 rain sensor connector.
*1: w/ Pre-collision System
*2: w/o Pre-collision System
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here |
NG |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - WIPER MOTOR WIRE AND RAIN SENSOR)
Disconnect the P8 main body ECU (multiplex network body ECU) connector.
Disconnect the Au1 wiper motor wire connector.
Disconnect the Z8*1 or a4*2 rain sensor connector.
*1: w/ Pre-collision System
*2: w/o Pre-collision System
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
REPLACE WIPER MOTOR WIRE Click here |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |