Diagnostic Aids
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- If there is a short or open in White/Black wire or Purple/White wire between BCM and ignition switch, BCM will not be able to accept a valid PASS-Key(R) code when program mode is activated. Vehicle will exhibit a no-crank condition.
- If DTC B2722 and/or B2723 exists, diagnose these DTCs first. These DTCs will affect BCM's ability to properly read a PASS-Key(R) resistance value.
- If key resistor pellet is incorrect, there will be no BCM outputs to theft deterrent relay or PCM for about 3 minutes. If a key (even a proper PASS-Key(R)) is inserted or ignition is turned on again, a 3 minute time-out period will reset. If battery is disconnected, time-out period will be reset when battery is reconnected.
- Clean key resistor contacts thoroughly. Check for poor connections at BCM and ignition lock cylinder. A poor connection may cause an open, incorrect PASS-Key(R) resistance or intermittent malfunction.