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
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 engine switch off.
(b) Turn the engine switch on (IG).
(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 |
C | ![]() | REPLACE BLIND SPOT MONITOR SENSOR RH |
Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Clearance Warning Buzzer (for Rear Side With Rear No. 2 Seat): Removal
REMOVAL PROCEDURE 1. REMOVE REAR NO. 2 SEAT ASSEMBLY Click here 2. REMOVE REAR DOOR SCUFF PLATE RH HINT: Use the same procedure as for the LH side. Click here 3. REMOVE REAR DOOR INSIDE SCUFF PLATE RH HINT: Use the same procedure as for the LH side. Click here 4. REMOVE REAR SEAT OUTER TRACK B ...
Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Panoramic Moon Roof System: Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be dis ...