Lexus ES manuals

Lexus ES: 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.

Blind Spot Monitor Master

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

  • Main body ECU (multiplex network body ECU)
  • Blind spot monitor sensor RH
Blind Spot Monitor Slave

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

  • Main body ECU (multiplex network body ECU)
  • Blind spot monitor sensor LH

CAUTION / NOTICE / HINT

NOTICE:

  • When checking for DTCs, make sure that the blind spot monitor system is on.
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    See page xxx

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.

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.

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 RH

C

REPLACE BLIND SPOT MONITOR SENSOR LH

READ NEXT:

 Clearance Warning Buzzer (for Front)

 Components

COMPONENTS ILLUSTRATION *1 COWL SIDE TRIM BOARD LH *2 FRONT DOOR OPENING TRIM COVER LH *3 FRONT DOOR SCUFF PLATE LH *4 INSTRUMENT SIDE PANEL LH *5 LOWER INSTRUMENT PANEL FINI

 Installation

INSTALLATION PROCEDURE 1. INSTALL NO. 1 CLEARANCE WARNING BUZZER (a) Connect the connector. (b) Engage the clamp to install the No. 1 clearance warning buzzer. 2. INSTALL LOWER INSTRUMENT PANEL FINISH

SEE MORE:

 Removal

REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during fuel pump control ECU removal/installation are shown below. Necessary Procedures After Parts Removed/Ins

 On-vehicle Inspection

ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: To prevent injury due to contact with an operating cooling fan, keep your hands and clothing away from the cooling fans when working in the engine compartment with the engine running or the power switch on (IG). PROCEDURE 1. INSPECT ENGINE COOL

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