Toyota Tacoma (2015-2018) Service Manual: Software Incompatibility with Body Control Module "B" (U1331)

Toyota Tacoma (2015-2018) Service Manual / 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 (driver side junction block assembly) 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 main switch assembly (warning canceling switch assembly) is 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. ).

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

Result

Result	Proceed to
No DTC is output	A
DTC is output from the blind spot monitor sensor LH (master)	B
DTC is output from the blind spot monitor sensor RH (slave)	C

USE SIMULATION METHOD TO CHECK

REPLACE BLIND SPOT MONITOR SENSOR LH

REPLACE BLIND SPOT MONITOR SENSOR RH

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Blind Spot Monitor System DTC Code Detection Item See page C1A45 Vehicle Speed Sensor ...

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 Code DTC Detectio ...

Other materials:

Pressure Control Solenoid "C" Actuator Stuck Off (P07957F)
SYSTEM DESCRIPTION The ECM uses the vehicle speed signal and signals from the transmission revolution sensors (NT, SP2) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear). The ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems of t ...

Rear Door(for Double Cab)
Components COMPONENTS ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION Adjustment ADJUSTMENT CAUTION / NOTICE / HINT HINT: Use the same procedures for both the LH and RH sides. The procedure described below is for the LH side. Centering bolts ...

Inspection
INSPECTION PROCEDURE 1. INSPECT TIRES (a) Check the tires for wear and proper inflation pressure. Standard Cold Tire Inflation Pressure: Tire Size Front Wheel kPa (kgf/cm2, psi) Rear Wheel kPa (kgf/cm2, psi) Spare Wheel kPa (kgf/cm2, psi) ...