Cadillac 2007 DTS - Manual (Page 112)

PASS-Key ® III+ Operation
Your vehicle has PASS-Key ® III+ (Personalized
Automotive Security System) theft-deterrent
system. PASS-Key
® III+ is a passive
theft-deterrent system. This means you do not
have to do anything special to arm or disarm the
system. It works when you insert or remove
the key from the ignition or transition the key from
run, accessory or start from the off position.
When the PASS-Key ® III+ system senses that
someone is using the wrong key, it prevents
the vehicle from starting. Anyone using a
trial-and-error method to start the vehicle will be
discouraged because of the high number of
electrical key codes.
If the engine does not start and the security light
comes on when trying to start the vehicle, the
key may have a damaged transponder. Turn the
ignition off and try again.
If the engine still does not start, and the key
appears to be undamaged, try another ignition key.
At this time, you may also want to check the fuse,
see Fuses and Circuit Breakers on page 443.
If the engine still does not start with the other key,
your vehicle needs service. If your vehicle does
start, the first key may be faulty. See your dealer
who can service the PASS-Key
® III+ to have a new
key made. In an emergency, contact Roadside
Assistance.
It is possible for the PASS-Key ® III+ decoder to
“learn” the transponder value of a new or
replacement key. Up to nine additional keys may
be programmed for the vehicle. The following
procedure is for programming additional keys only.
If all the currently programmed keys are lost or
do not operate, you must see your dealer or
a locksmith who can service PASS-Key
® III+ to
have keys made and programmed to the system.
See your dealer or a locksmith who can service
PASS-Key
® III+ to get a new key blank that is
cut exactly as the ignition key that operates
the system.
112