Normal Operation

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

During normal operation, the restraints control module (RCM) will illuminate the air bag warning indicator, located in the instrument cluster (IC) module, continuously for approximately 6 seconds and then go out after the ignition switch is placed in the ON or START position and no air bag faults exist. The air bag warning indicator will remain illuminated continuously after 3 cycles of a lamp fault code (LFC), if a fault exists. Be sure to cycle the ignition switch and look for an approximate 6-second indicator prove-out without LFCs.

If the RCM detects an open or short to ground on the air bag warning indicator circuit, it will store DTC B1869 in memory and sound the secondary air bag warning.

DTC B1869 Lamp Air Bag Warning Indicator Circuit Open - If the RCM detects an open circuit or short to ground when the indicator is not active, it will set this DTC.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
RCM
Air bag warning indicator
IC module