DTC B1783: Front Left Occupant Detection Sensor Collision Detection

Diagnosis start condition: 

When the ignition voltage is 10 - 16 V.

DTC detecting condition: 

Load sensor detects a collision.

Trouble symptom: 

Occupant judgment of occupant detection control module stops.

1. CHECK AIRBAG SYSTEM OPERATION  .

   Check the operation status of the airbag system.

   Is there any airbag system operated?

   Yes  : Replace the seat assembly. Ref. to SEATS>FRONT SEAT .

   Perform inspection referring to inspection part after collision. Ref. to AIRBAG SYSTEM>INSPECTION LOCATIONS AFTER A COLLISION .

   No  : Go to  2.

2. PERFORM [Rezero]  .

   Perform [Rezero]. Ref. to OCCUPANT DETECTION (DIAGNOSTICS)>REZERO .

   Is [Rezero] completed?

   Yes  : Go to  3.

   No  : Perform operation according to an error code displayed when [Rezero] fails. Ref. to OCCUPANT DETECTION (DIAGNOSTICS)>Rezero>LIST .

3. CHECK OCCUPANT DETECTION CONTROL MODULE  .
   1. Using the Subaru Select Monitor, perform the clear memory of [Occupant Detection]. Ref. to COMMON (diag)>CLEAR MEMORY .
   2. Execute the inspection mode. Ref. to OCCUPANT DETECTION (DIAGNOSTICS)>INSPECTION MODE .
   3. Read the DTC of [Occupant Detection] using the Subaru Select Monitor. Ref. to OCCUPANT DETECTION (DIAGNOSTICS)>Diagnostic Trouble Code (DTC) .

   Is DTC B1783, B1784, B1785 or B1786 displayed? (Current malfunction)

   Yes  : Replace the occupant detection control module. Ref. to SEATS>Front Seat>DISASSEMBLY>POWER SEATS (TYPE WITH VENTILATION) .

   No  : Currently, it is normal.