Chrysler Dodge Caravan 2002 Manual page 635

8Q - 4 VEHICLE THEFT SECURITY
TRANSPONDER KEY (Continued)
Fig. 1 TRANSPONDER KEY - TYPICAL
1 - MOLDED CAP
2 - TRANSPONDER
3 - MOLDED CAP REMOVED
4 - SENTRY KEY
SKIM in addition to being cut to match the mechan-
ical coding of the ignition lock cylinder. Refer to Elec-
trical, Vehicle Theft Security, Transponder Key,
Standard Procedure - Transponder Programming.
The Sentry Key's transponder is within the range
of the SKIM's transceiver antenna ring when it is
inserted into the ignition lock cylinder. When the
ignition switch is turned to the ON position, the
SKIM communicates with the Sentry Key via a radio
frequency (RF) signal. The SKIM determines if a
valid key is present based on the information it
receives from the Sentry Key. If a valid key is
detected, that fact is communicated to the PCM via
the PCI bus and the vehicle is allowed to continue
running. If an invalid key is received by the PCM or
no status at all is communicated, the vehicle will
stall after two (2) seconds of running. The indicator
light will be flashing at this point. The Sentry Key's
transponder can not be repaired. If it is faulty or
damaged, it must be replaced.
Common communication problems:
• Two transponder keys too close together.
• Speed Pass too close to transponder key.
Solid indicator that there is a system failure.
• Loss of PCM communication.
• Failed antenna circuit.
STANDARD PROCEDURE - TRANSPONDER
PROGRAMMING
USING A DRB III SCAN TOOL
All Sentry Keys included with the vehicle are pre-
programmed to work with the Sentry Key Immobi-
lizer System (SKIS) when it is shipped from the
factory. The Sentry Key Immobilizer Module (SKIM)
can be programmed to recognize up to a total of eight
Sentry Keys. When programming a blank Sentry Key
transponder, the key must first be cut to match the
ignition lock cylinder of the vehicle for which it will
be used. The vehicle's four digit PIN code will be
required to complete this task since you will need it
to enter the Secured Access Mode in the SKIM. The
following steps must be completed using a DRB III
scan tool:
(1) Insert the blank key into the ignition and turn
it to the RUN position.
(2) Using a DRB III
Alarm, SKIM, Miscellaneous, and then Program
New Key.
(3) Enter the four digit PIN code using the DRB
III scan tool. When programming is completed, the
SKIM will exit Secured Access Mode and the DRB
III scan tool will display the results of your attempt
to program the key. One of five distinct results may
be displayed. All five are listed below:
• Programming Successful is displayed if the
Sentry Key programming is successful.
• Learned Key in Ignition is displayed if the
key in the ignition has already been programmed
into that vehicle's SKIM.
• Eight Keys Already Learned (At The Maxi-
mum) Programming Not Done is displayed if
eight keys have already been programmed into the
SKIM. In this case, if a new key needs to be added
due to a lost or defective key, the Erase All Keys
command (which requires entering the Secured
Access Mode) has to be performed. Following the
Erase All Keys command, all keys that will be used
to operate the vehicle MUST be reprogrammed to
the SKIM.
• Programming Not Attempted is displayed
after an Erase All Keys function is executed.
• Programming Key Failed is displayed if fur-
ther diagnosis is required.
To learn additional keys, turn the ignition OFF,
remove the learned key, insert the next new blank
key, and repeat the steps from the beginning.
"CUSTOMER LEARN" MODE
This feature is only available on domestic vehicles
or those which have a U.S. country code designator.
This procedure requires access to at least two valid
Sentry Keys. If two valid Sentry Keys are not avail-
RS
scan tool, select Theft