are you in USA with a USA CAR, MUST WE ASK THAT?
You CANT if the SKIS lamp glows. or flashes you cant.
In general there are 3 keys,
metal only (hopeless)
fob-less, but has chip, works (its looks like thick key) (I have 2)
and full fob with door controls works.
the SM (FSM) is free to read, and the chapter tells you all that.
in clear English, and how they did that,
the super old ones, you can, 93-98
if you had scanned the PCM it would have told you why it dont start. IMMo tripped, (vta,vtss, SKIM, what ever)
so now you now why,
now you ask how to defeat it.
you cant . you'd have to hack into the PCI network then send secret codes. sorry, I bet you cant do that.
only these can.
the SM book covers usa cars.
1999 is the big year change on our cars, now called WJ
here are the key words in this book.
ill paste them. seen end words, they MATTER !
"The VTSS also includes the Sentry Key Immobilizer
System (SKIS). The SKIS includes a steering
column-mounted control module and antenna unit as
well as a transponder in each ignition key. If the
SKIS module does not recognize the ignition key
transponder, it prevents the engine from running.
The SKIS uses a Radio Frequency (RF) transceiver
and electronically coded Sentry Key transponders to
verify that a valid key is inserted in the ignition
switch lock cylinder. If the SKIS recognizes the key
as valid, it sends messages to the PCM that will
allow the engine to run. If the SKIS does not recognize
a valid key, the engine will not run. While the
engine starting system will operate and the engine
may initially start and run up to about 800 revolutions-
per-minute on residual fuel pressure, the vehicle
cannot be driven without a valid Sentry Key
The SKIS includes two valid Sentry Key transponders
from the factory. If the customer wishes, additional
non-coded blank Sentry Keys are available.
These blank keys can be cut to match a valid ignition
key, but the engine will not run unless the key transponder
is also programmed to the vehicle. The SKIS
will recognize no more than eight valid Sentry Key
transponders at any one time.
The SKIS performs a self-test each time the ignition
switch is turned to the On position, and will
store Diagnostic Trouble Codes (DTCs) if a system
malfunction is detected. The SKIS can be diagnosed,
and any stored DTC can be retrieved using a DRB
scan tool as described in the proper Diagnostic Procedures
now the super key(no pun) words
If the SKIM receives an RF signal with
valid "Secret Key" and transponder identification
the SKIM sends a "valid key" message to the
PCM over the PCI data bus.