C3 - Check Door Ajar Switch Open Position

^ Remove door trim panel.

^ Disconnect wiring harness from door ajar switch.

^ Fully close door.

^ Measure resistance between switch terminal and ground (latch).

^ Is resistance greater than 500k ohms?

YES -- Go to C4. C4 - Check Door Ajar Switch Closed Position

NO -- Replace switch. Install original passive restraint module.