B1871 FORD – Passenger Air Bag Deactivation Switch Fault

B1871 FORD Possible Symptoms

Air Bag Warning Light ON

B1871 FORD Possible Causes

Faulty Passenger Air Bag Deactivation Switch,Passenger Air Bag Deactivation Switch harness is open or shorted,Passenger Air Bag Deactivation Switchcircuit poor electrical connection,Faulty Restraints Control Module (RCM)

B1871 FORD Description

The Restraints Control Module (RCM) monitors status of Passenger Air Bag Deactivation (PAD) switch. The PAD switch signals RCM by switching resistance to ground. If RCM senses 900-1100 ohms in PAD switch, it enables passenger-side air bag and turns off PAD switch warning light. If RCM senses 400-600 ohms in PAD switch, it deactivates passenger-side air bag and turns on PAD switch warning light. If RCM senses an invalid resistance, it will store Diagnostic Trouble Code (DTC) B1871 in memory.