Dtc B2000 Short To B+ In Seat Belt Motor Rh Circuit

Restraints. Lexus Gs430, Gs300. Uzs190 Grs190
Pre-Crash Safety. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU)

INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH

DTC B2000 Short to B+ in Seat Belt Motor RH Circuit


DESCRIPTION

The seat belt control ECU receives information from the seat belt control ECU (distance control ECU) through CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.

CAUTION:
The pretensioner is built into the front seat outer belt assembly RH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may activate the pretensioner.

DTC No.
DTC Detection Condition
Trouble Area
B2000
  1. Short to B+ in the seat belt motor RH circuit continues for 1 second or more
  2. Short in the seat belt motor RH circuit
  1. Front seat outer belt assembly RH
  2. Wire harness (seat belt control ECU - front seat outer belt assembly RH)
  3. Seat belt control ECU

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Pre-Crash Safety.Pre-Crash Safety System. Dtc B2000 Short To B+ In Seat Belt Motor Rh Circuit


INSPECTION PROCEDURE

NOTICE:
When the seat belt control ECU is replaced with a new one, Active Test must be performed (Click here).
1.CHECK WIRE HARNESS (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU)


    Lexus Gs430, Gs300. Uzs190 Grs190.Pre-Crash Safety.Pre-Crash Safety System. Dtc B2000 Short To B+ In Seat Belt Motor Rh Circuit

  1. Turn the engine switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

  1. Disconnect the V8 belt connector.

  1. Connect the cable to the negative (-) battery terminal.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage :
    Tester Connection
    		Condition
    		Specified Condition
    V8-1 - Body ground
    		Engine switch on (IG)
    		Below 1 V
    V8-2 - Body ground
    		Engine switch on (IG)
    		Below 1 V

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    V8-1 - V8-2
    		Always
    		1 MΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


2.INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH


    Lexus Gs430, Gs300. Uzs190 Grs190.Pre-Crash Safety.Pre-Crash Safety System. Dtc B2000 Short To B+ In Seat Belt Motor Rh Circuit

  1. Measure the voltage of the connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1 - Body ground
    		Engine switch on (IG)
    		Below 1 V
    2 - Body ground
    		Engine switch on (IG)
    		Below 1 V


NG
REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH
OK

REPLACE SEAT BELT CONTROL ECU