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 driving support ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.





WIRING DIAGRAM





INSPECTION PROCEDURE

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.

PROCEDURE

1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH

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





(b) Turn the power switch on (IG).

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

Standard Voltage:





(d) Reconnect the front seat outer belt assembly RH connector.

NG -- REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH Removal
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY 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 assembly RH connector.

(c) Disconnect the seat belt control ECU connector.

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

(e) Turn the power switch on (IG).

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





Standard Voltage:





Text in Illustration





(g) 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.

(h) Reconnect the seat belt control ECU and front seat outer belt assembly RH connectors.

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

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU)

OK -- REPLACE SEAT BELT CONTROL ECU Removal