B1772

DTC B1772 Seat Position Sensor Circuit Malfunction

DESCRIPTION

DTC Detection Condition:

The seat position sensor circuit consists of the occupant classification ECU and the seat position sensor.

The seat position sensor sends the seat position signal to the occupant classification ECU to control the dual stage deployment of the front passenger airbag.

DTC B1772 is recorded when a malfunction is detected in the seat position 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.

Step 1:

Step 1 (Continued)-2:

Step 3-4:

Step 5-6:

Step 7-8:

Step 8 (Continued)-10: