Passenger Airbag Deactivation Fault
Diagnostic Rabbit Hole This one tested my patience. Got an airbag warning tied to the front passenger airbag deactivation indicator. ISTA reported: 930AB2 – Indicator lamp for front passenger airbag deactivation: Short-circuit to earth / open circuit At first, this sounded terrifying. Airbags, igniters, crash safety modules. The usual things that make you reconsider touching anything at all. My mind went straight to worst-case scenarios: Faulty seat airbag igniter Broken wiring inside the seat Bad occupancy sensor Worst of all, an ACSM failure ( Chasing the Obvious (and Being Wrong) I pulled the wiring diagrams in ISTA and traced the entire circuit. The ACSM feeds connector X12-1B, which then runs directly to B69, the side airbag igniter in the seat. ...