B1771

SUPPLEMENTAL RESTRAINT SYSTEM: OCCUPANT CLASSIFICATION SYSTEM: B1771: Passenger Side Buckle Switch Circuit Malfunction

B1771 Passenger Side Buckle Switch Circuit Malfunction

DESCRIPTION
The passenger side buckle switch circuit consists of the occupant classification ECU and the front seat inner belt RH.

DTC B1771 is recorded when a malfunction is detected in the passenger side buckle switch circuit.

Troubleshoot DTC B1771 first when DTCs B1771 and B1795 are output simultaneously.






WIRING DIAGRAM






INSPECTION PROCEDURE

HINT:
- If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat
installation bolts to see the undersurface of the seat cushion.

- In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of
time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.