Circuit Description
WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic checks for mismatched passwords between BCM and PCM. Password has to be learned whenever BCM or PCM are replaced.
Conditions for setting DTC are: PCM detects incorrect password from BCM, fuel disable lock-out set, incorrect fuel continue password is received, invalid ignition key or faulty ignition switch or BCM was replaced.