B2000

PRE-COLLISION: PRE-COLLISION SYSTEM: B2000: Short to B+ in Seat Belt Motor RH Circuit
B2000 - Short to B+ in Seat Belt Motor RH 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 RH.

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





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 RH - 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 RH 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 RH connector.

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

2. CHECK FRONT SEAT OUTER BELT ASSEMBLY RH





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

(b) Measure the voltage of the belt.

Standard voltage:





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

NG -- REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH

OK -- REPLACE SEAT BELT CONTROL ECU