B2005

PRE-COLLISION: PRE-COLLISION SYSTEM: B2005: Short to B+ in Seat Belt Motor LH Circuit
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 LH.

CAUTION:
The pretensioner is built into the front seat outer belt LH. 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.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When the seat belt control ECU is replaced with a new one, Initialization must be performed Pre-Collision System.

PROCEDURE

1. CHECK WIRE HARNESS (FRONT SEAT OUTER BELT LH - SEAT BELT CONTROL ECU)

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





CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(b) Disconnect the front seat outer belt LH connector.

(c) Disconnect the seat belt control ECU connector.

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

(e) Measure the resistance and voltage of the wire harness side connector.

Standard resistance:





Standard voltage:





(f) Reconnect the seat belt control ECU connector.

(g) Reconnect the front seat outer belt LH connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK FRONT SEAT OUTER BELT ASSEMBLY LH





(a) Disconnect the front seat outer belt LH connector.

(b) Measure the voltage of the belt.

Standard voltage:





(c) Reconnect the front seat outer belt LH connector.

NG -- REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH

OK -- REPLACE SEAT BELT CONTROL ECU