Lexus NX manuals

Lexus NX: Software Incompatibility with Body Control Module "B" (U1331)

Lexus NX 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 No.

Detection Item

DTC Detection Condition

Trouble Area

Note

U1331

Software Incompatibility with Body Control Module "B"

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 main switch (combination switch assembly) is on.
  • Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.

    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 on the vehicle is correct.

OK:

The part number is correct.

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

OK

2.

CHECK DTC

(a) Clear the DTCs.

Click here

Body Electrical > Blind Spot Monitor Master > Clear DTCs Body Electrical > Blind Spot Monitor Slave > Clear DTCs

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

Click here

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result

Proceed to

DTC U1331 is not output

A

DTC U1331 is output from the blind spot monitor sensor LH (Master)

B

DTC U1331 is output from the blind spot monitor sensor RH (Slave)

C
A

USE SIMULATION METHOD TO CHECK

B

REPLACE BLIND SPOT MONITOR SENSOR LH

C

REPLACE BLIND SPOT MONITOR SENSOR RH

READ NEXT:

 Main Switch Circuit

DESCRIPTION When the blind spot monitor main switch (combination switch assembly) is turned on, a signal is sent to the blind spot monitor sensor LH and the blind spot monitor indicator on the blind s

 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

 Clearance Warning Buzzer (for Front Side)

ComponentsCOMPONENTS ILLUSTRATION *1 NO. 1 CLEARANCE WARNING BUZZER - -

SEE MORE:

 Buzzer Circuit Short to Ground or Open (C1A4A14)

DESCRIPTION If the forward recognition camera detects an open or short to ground in the buzzer circuit, it will store DTC C1A4A14. DTC No. Detection Item DTC Detection Condition Trouble Area C1A4A14 Buzzer Circuit Short to Ground or Open The forward recognition camera detects an ope

 Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Power Steering System DTC No. Detection Item Warning Indicate Return-to-normal Condition Note Link C1511 Torque Sensor1 On Power switch on (IG) again - C1512 Torque Sensor2 On Power switch on (IG) again - C1513 Torque

© 2016-2024 Copyright www.lexunx.com