B1790

DTC B1790 AIRBAG SENSOR ASSEMBLY CENTER COMMUNICATION CIRCUIT MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The airbag sensor assembly center communication circuit consists of the occupant classification ECU and the airbag sensor assembly center.

DTC B1790 is recorded when a malfunction is detected in the airbag sensor assembly center communication circuit.

HINT:
- When DTC B1630/32 is detected as a result of troubleshooting for the supplemental restraint system, perform troubleshooting for DTC B1790 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 - 5:

Step 6 - 7:

Step 8 - 9:

Step 10 - 13:

Step 14 - 15:

Step 16 - 17:

Step 18 - 19:

Step 20 - 23:

Step 24 - 25:

Step 26 - 27:

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.