B1771

DTC B1771 Passenger Side Buckle Switch Circuit Malfunction

DESCRIPTION

DTC Detection Condition:

The passenger side buckle switch circuit consists of the occupant classification ECU and the buckle switch RH.

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

NOTE: Replace the occupant classification ECU, occupant classification sensor, seat cushion cover pad, seat cushion cover and seat cushion seat heater as a 5 part set (see supply set part no.).

HINT:
- When DTC B1650/32 is detected as a result of troubleshooting the supplemental restraint system, check the DTCs stored in the occupant classification ECU, and perform troubleshooting for those DTCs first.
- Use the intelligent tester to check for DTCs of the occupant classification ECU, otherwise the DTC cannot be read.

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 tip over. Holding the seat up for a long period of time may cause problems, such as seat rail deformation. Hold the seat up only for as long as necessary.

Step 1:

Step 1 (Continued)-2:

Step 3-4:

Step 5-6:

Step 7-8:

Step 9-10: