Passenger Air Bag Deactivation Switch Fault
Table of contents
B1871 MAZDA 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)
How do I fix code B1871 MAZDA?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the B1871 MAZDA code
The cost of diagnosing the B1871 MAZDA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Air Bag Warning Light ON
B1871 MAZDA 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.