This DTC is stored when the destination information of the main body ECU (multiplex network body ECU) does not match that of the blind spot monitor sensors.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U1331 | Software Incompatibility with Body Control Module "B" | Destination information of the main body ECU and blind spot monitor sensor do not match | ·
Main body ECU (multiplex network body ECU) ·
Blind spot monitor sensor RH ·
Blind spot monitor sensor LH |
When checking for DTCs, make sure that the blind spot monitor system is turned on.
Before replacing the main body ECU (multiplex network body ECU), refer to the Service Bulletin. (w/ Entry and Start System)
Check the main body ECU (multiplex network body ECU) part number.
Check if the part number of the main body ECU (multiplex network body ECU) installed to the vehicle is correct.
The part number is correct.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
for LHD
for RHD
Recheck for DTCs and check if the same DTC is output again.
| Result | Proceed to |
|---|---|
| No DTCs are output. | A |
| DTC U1331 is output ("Blind Spot Monitor Master"). | B |
| DTC U1331 is output ("Blind Spot Monitor Slave"). | C |
A
B
C