B2001

PRE-COLLISION: PRE-COLLISION SYSTEM: B2001,B2006: Short to GND in Seat Belt Motor RH Circuit

B2001 - Short to GND in Seat Belt Motor RH Circuit
B2006 - Short to GND in Seat Belt Motor LH Circuit

DESCRIPTION

The seat belt control ECU receives collision information from the driving support ECU and skid control ECU via CAN communication, and tightens the seat belt by operating the motor inside the front seat outer belt assembly.

When DTC B2001 is detected, DTCs B2015, B2026, and B2027 will not be detected.

When DTC B2006 is detected, DTCs B2020, B2031, and B2032 will not be detected.





WIRING DIAGRAM









INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK SEAT BELT CONTROL ECU





(a) Disconnect the S45 ECU connector.

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

Standard resistance:

for LH





for RH





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

OK -- REPLACE SEAT BELT CONTROL ECU Removal

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





(a) Disconnect the S4*1 and R2*2 belt connectors.

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

Standard resistance:

for LH





for RH





Result





C -- REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH Removal

B -- REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH Removal

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR