DESCRIPTION
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 |
|
CAUTION / NOTICE / HINT
NOTICE:
Click here
*1: w/ Smart Key System
PROCEDURE
1. |
CONFIRM PART NUMBER (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Check the main body ECU (multiplex network body ECU) part number.
(1) Check if the part number of the main body ECU (multiplex network body ECU) installed to the vehicle is correct.
OK:
The part number is correct.
NG | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
|
2. |
CHECK DTC |
(a) Turn the ignition switch off.
(b) Turn the ignition switch to ON.
(c) Recheck for DTCs and check if the same DTC is output again.
Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes
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 | ![]() |
USE SIMULATION METHOD TO CHECK
|
B | ![]() |
REPLACE BLIND SPOT MONITOR SENSOR LH (MASTER) |
C | ![]() |
REPLACE BLIND SPOT MONITOR SENSOR RH (SLAVE) |
Toyota CH-R Service Manual > Can Communication System: Blind Spot Monitor Sensor Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Blind Spot Monitor Sensor Communication Stop Mode
Any of the following conditions are met:
Communication stop for "Blind Spot Monitor Master" is indicated
on th ...
Toyota CH-R Service Manual > Brake System: 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 i ...