Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Software Incompatibility with Body Control Module "B" (U1331)
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:
- 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 Registration.
Click here
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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 |
Lost Communication with Blind Spot Monitor Slave Module (U0232)
DESCRIPTION This DTC is stored when the blind spot monitor sensor LH judges that there is a communication problem with the blind spot monitor sensor RH. DTC No. Detection Item DTC Detection Con ...
Power Source Circuit
DESCRIPTION This circuit provides power to operate the blind spot monitor sensor. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performin ...
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Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Roof Headlining (w/ Rear No. 2 Seat): Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE NO. 2 ANTENNA CORD SUB-ASSEMBLY Click here 2. REMOVE WASHER HOSE ASSEMBLY (a) Remove the washer hose assembly. *A for Standard Roof *B for Sliding Roof 3. REMOVE VANITY LIGHT ASSEMBLY Click here 4. REMOVE TELEPHONE MICROPHONE ASSEMBLY Click here 5 ...
Chevrolet Trax (2013-2022) Owner's Manual > Vehicle Checks: Doing Your Own
Service Work
Warning
It can be dangerous to work on
your vehicle if you do not have
the proper knowledge, service
manual, tools, or parts. Always
follow owner manual procedures
and consult the service manual
for your vehicle before doing any
service work.
If doing some of your own service
work, use the proper se ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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Chevrolet Trax (2013-2022) Owner's Manual
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