B1771

DTC B1771 PASSENGER SIDE BUCKLE SWITCH CIRCUIT MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detecting Condition:

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

DTC B1771 is recorded when a malfunction is detected in the passenger side buckle switch circuit. Troubleshoot DTC B1771 first when the DTC B1771 and B1795 are output simultaneously.

HINT:
- When DTC B1650/32 is detected as a result of troubleshooting for the supplemental restraint system, perform troubleshooting for DTC B1771 of the occupant classification system.
- Use the hand-held tester to check the DTC of the occupant classification ECU, otherwise the DTC cannot be read.

Wiring Diagram:

Step 1 - 2:

Step 3 - 4:

Step 5 - 6:

Step 7 - 8:

Step 9 - 11:

INSPECTION PROCEDURE

HINT:
- If troubleshooting (wire harness inspection) is difficult to perform, remove the front RH seat assembly installation bolts to see the under surface of 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.