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

Restraints. Lexus Is250, Is220D. Gse20 Ale20
Pre-Crash Safety. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH

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

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


DESCRIPTION

The seat belt control ECU receives information from the 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 deploy 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 Is250, Is220D. Gse20 Ale20.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, INITIALIZATION must be performed (Click here).
1.INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH
Lexus Is250, Is220D. Gse20 Ale20.Pre-Crash Safety.Pre-Crash Safety System. Dtc B2000 Short To B+ In Seat Belt Motor Rh Circuit

  1. Disconnect the P8 connector of the front seat outer belt assembly RH.

  1. Measure the voltage according to the value(s) in the table below.

Standard voltage:
Tester Connection
Condition
Specified Condition
P8-1 - Body ground
Engine switch on (IG)
Below 1 V
P8-2 - Body ground
Engine switch on (IG)
Below 1 V


NG
REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH
OK


2.CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU)


    Lexus Is250, Is220D. Gse20 Ale20.Pre-Crash Safety.Pre-Crash Safety System. Dtc B2000 Short To B+ In Seat Belt Motor Rh Circuit

  1. Disconnect the negative (-) battery terminal .

  1. Disconnect the O38 connector of the seat belt control ECU.

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

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage :
    Tester Connection
    		Condition
    		Specified Condition
    P8-1 - Body ground
    		Engine switch on (IG)
    		Below 1 V
    P8-2 - Body ground
    		Engine switch on (IG)
    		Below 1 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE SEAT BELT CONTROL ECU