Lexus IS250 IS220d GSE20 ALE20 - PRE-CRASH SAFETY

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FRONT SEAT OUTER BELT ASSEMBLY LH

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

DTC B2005 Short to B+ in Seat Belt Motor LH Circuit

DESCRIPTION

The seat belt control ECU receives information from the distance control ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly LH.


  • CAUTION:
  • The pretensioner is built into the front seat outer belt assembly LH. 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 ConditionTrouble Area
B2005
Short to B + in seat belt motor LH circuit continues for 1 second or more
Short in seat belt motor LH circuit
Front seat outer belt assembly LH
Wire harness (Seat belt control ECU - front seat outer belt assembly LH)
Seat belt control ECU

WIRING DIAGRAM

Dtc B2005 Short To B+ In Seat Belt Motor Lh Circuit. PRE-CRASH SAFETY. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

  • NOTICE:
  • When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed .
1.INSPECT FRONT SEAT OUTER BELT ASSEMBLY LH
Dtc B2005 Short To B+ In Seat Belt Motor Lh Circuit. PRE-CRASH SAFETY. Lexus IS250 IS220d GSE20 ALE20

Disconnect the O13 connector of the front seat outer belt assembly LH.

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

  • Standard voltage:
  • Tester ConnectionConditionSpecified Condition
    O13-1 - Body groundEngine switch on (IG)Below 1 V
    O13-2 - Body groundEngine switch on (IG)Below 1 V
NG
REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH
OK
2.CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU)
Dtc B2005 Short To B+ In Seat Belt Motor Lh Circuit. PRE-CRASH SAFETY. Lexus IS250 IS220d GSE20 ALE20

Disconnect the negative (-) battery terminal.

Disconnect the O38 connector of the seat belt control ECU.

Connect the negative (-) terminal to the battery.

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

  • Standard voltage:
  • Tester ConnectionConditionSpecified Condition
    O13-1 - Body groundEngine switch on (IG)Below 1 V
    O13-2 - Body groundEngine switch on (IG)Below 1 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE SEAT BELT CONTROL ECU
LEXUS IS250, IS220d / GSE20 ALE20
PRE-CRASH SAFETY
Lexus IS250 IS220d GSE20 ALE20
PRE-CRASH SAFETY SYSTEM