B2007

PRE-COLLISION: PRE-COLLISION SYSTEM: B2002: Open in Seat Belt Motor RH Circuit

DTC B2002 - Open in Seat Belt Motor RH Circuit

DTC B2007 - Open 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 B2002 is detected, DTCs B2026 and B2027 will not be detected.
When DTC B2007 is detected, DTCs 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:





HINT:
*1: for LH
*2: for RH

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




(a) Disconnect the S4*1 and R2*2 belt connectors.
(b) Disconnect the S45 ECU connector.
(c) Using a service wire, connect S4-1*1 or R2-1*2 and S4-2*1 or R2-2*2 of the connector on the front seat outer belt.
HINT:
*1: for LH
*2: for RH
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:






Result





C -- REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH
B -- REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH
A -- REPAIR OR REPLACE HARNESS OR CONNECTOR