B1776

DTC B1773 Belt Tension Sensor Circuit Malfunction
DTC B1776 Seat Belt Tension Sensor Power Source Circuit Malfunction

DESCRIPTION

DTC Detection Condition:

The belt tension sensor circuit consists of the occupant classification ECU and the belt tension sensor.

The belt tension sensor sends the belt tension signal to the occupant classification ECU to control the occupant classification system.

DTCs B1773 and B1776 are recorded when a malfunction is detected in the belt tension sensor 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 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.

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