Lamp Fault Codes

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

When the restraints control module (RCM) detects a system fault, it will cause the air bag indicator to flash a coded sequence of lamp fault codes (LFC). The RCM is capable of communicating a LFC for each specific fault that is present, including each flagged fault of a bit-mapped diagnostic trouble code (DTC) (except for DTC B2792 (cross link between firing loops) which only flashes one LFC). The LFC is made up of 2 numbers. Each of the 2 numbers is 1 or 2 digits, depending on the fault that is present. The 2 numbers that make up a LFC are separated by a hyphen (-) to clearly distinguish between the 2 numbers. The first number is flashed with a 0.5-second interval between pulses. There is a 2-second pause before the second number is flashed, which also has a 0.5-second interval between pulses. There is a 5-second pause between each display of a LFC.

Each LFC is flashed 3 times after which the air bag indictor will remain lit for the remainder of the key-on cycle and activate an audible chime. If there are multiple LFCs, each LFC will flash in order of priority.