N: LFC 25/DTC B1871-Pass Air Bag Deactivation Switch Fault

Normal Operation
The Restraints Control Module (RCM) monitors the status of the Passenger Air Bag Deactivation (PAD) switch at pin C223-9, circuit 1112 (W/LB). The PAD switch signals the RCM by switching a resistance to ground. If the RCM senses 900-1100 ohms in the PAD switch, it enables the passenger air bag and turns off the PAD switch warning lamp. If the RCM senses 400-600 ohms in the PAD switch, it deactivates the passenger air bag and turns the PAD switch warning lamp on. If the RCM detects an invalid resistance, it will store a Diagnostic Trouble Code (DTC) B1871 in memory and flash a Lamp Fault Code (LFC) 25 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
A PAD switch fault could be caused by:
- a damaged or inoperative PAD switch
- a damaged or inoperative RCM module
- a short to battery, short to ground or open on circuit 1112 (W/LB).

Pinpoint Test Steps:

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