B1781

DTC B1781 Front Occupant Classification Sensor RH Circuit Malfunction

DESCRIPTION

DTC Detecting Condition:

The front occupant classification sensor RH circuit consists of the occupant classification ECU and the front occupant classification sensor RH.

DTC B1781 is recorded when a malfunction is detected in the front occupant classification sensor RH circuit.

Wiring Diagram:

Step 1-2:

Step 3:

Step 4:

Step 5-6:

Step 6(continued)-9:

Step 9(continued)-13:

Step 13(continued)-14:

INSPECTION PROCEDURE

HINT:
- If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat 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.