Toyota Tundra Service Manual: Software Incompatibility with Body Control Module "B" (U1331)

Toyota Tundra Service Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Blind Spot Monitor System / 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 Code	DTC Detection Condition	Trouble Area
U1331	Destination information of the main body ECU (multiplex network body ECU) and blind spot monitor sensor do not match.	Main body ECU (multiplex network body ECU) Blind spot monitor sensor LH Blind spot monitor sensor RH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

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 on the vehicle is correct.

OK:

The part number is correct.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

CHECK DTC

(a) Clear the DTCs (See page ).

(b) Recheck for DTCs and check if the same DTC is output again.

Click here

Result

Result	Proceed to
No DTC is output	A
DTC U1331 is output ("Blind Spot Monitor Master").	B
DTC U1331 is output ("Blind Spot Monitor Slave").	C

USE SIMULATION METHOD TO CHECK

REPLACE BLIND SPOT MONITOR SENSOR RH

REPLACE BLIND SPOT MONITOR SENSOR LH

Lost Communication with Blind Spot Monitor Slave Module (U0232)

Clearance Sonar Main Switch

See More:

Toyota Tundra Owners Manual > Multimedia: Using the audio system
Basic audio operations Basic audio operations and functions common to each mode are explained in this section. Operating the multimedia system Turn this knob to select radio station bands, tracks and files. Also the knob can be used to select items in the list display. Press the "" or "" button to s ...