DTC B1783: Front Left Occupant Detection Sensor Collision Detection

Diagnosis start condition: 

When the ignition voltage is 10 V - 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. Refer to SEATS>FRONT SEAT . Perform inspection referring to inspection part after collision. Refer to AIRBAG SYSTEM>INSPECTION LOCATIONS AFTER A COLLISION .

   No:  Go to  2.

2. PERFORM [Rezero]. 

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

   Is [Rezero] completed?

   Yes:  Go to  3.

   No:  Perform operation according to an error code displayed when [Rezero] fails. Refer 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]. Refer to COMMON (DIAG)>CLEAR MEMORY .
   2. Execute the inspection mode. Refer to OCCUPANT DETECTION (DIAGNOSTICS)>INSPECTION MODE .
   3. Read the DTC of [Occupant Detection] using the Subaru Select Monitor. Refer 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. Refer to SEATS>FRONT SEAT>DISASSEMBLY>PASSENGER'S SEAT .

   No:  Currently, it is normal.