Normal Operation
WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
During normal operation, the air bag warning indicator will illuminate 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 fault exists. The restraints control module (RCM) turns the air bag warning indicator off by supplying a ground on the air bag warning indicator circuit.
If the RCM detects an open or short to ground on the air bag warning indicator circuit, it will store DTC B1869 in memory.
- DTC B1869 Lamp Air Bag Warning Indicator Circuit Open - If the RCM detects an open circuit or short to ground on the air bag warning indicator circuit, it will set this DTC.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- RCM
- Instrument cluster (IC) module