Standard Procedure - Pcm/Skim Programming - Chrysler Vehicle User Manual

8E - 10 ELECTRONIC CONTROL MODULES
SENTRY KEY IMMOBILIZER MODULE (Continued)
key. The SKIM then waits for an RF signal response
from the transponder. If the response received iden-
tifies the key as valid, the SKIM sends a valid key
message to the PCM over the PCI data bus. If the
response received identifies the key as invalid, or if
no response is received from the key transponder, the
SKIM sends an invalid key message to the PCM. The
PCM will enable or disable engine operation based
upon the status of the SKIM messages. It is impor-
tant to note that the default condition in the PCM is
an invalid key; therefore, if no message is received
from the SKIM by the PCM, the engine will be dis-
abled and the vehicle immobilized after two seconds
of running.
The SKIM also sends SKIS indicator status mes-
sages to the EMIC. This indicator status message
tells the EMIC to turn the indicator on for about
three seconds each time the ignition switch is turned
On, as a bulb test. The SKIM sends indicator status
messages to the EMIC to turn the indicator off, turn
the indicator on, or to flash the indicator on and off.
If the SKIS indicator flashes upon ignition On or
stays on solid after the bulb test, it signifies a SKIS
fault. If the SKIM detects a system malfunction
and/or the SKIS has become inoperative, the SKIS
indicator will stay on solid. If the SKIM detects an
invalid key or if a key transponder-related fault
exists, the SKIS indicator will flash. If the vehicle is
equipped with the Customer Learn transponder pro-
gramming feature, the SKIM will also send messages
to the EMIC to flash the SKIS indicator and to gen-
erate a single audible chime whenever the Customer
Learn programming mode is being utilized. (Refer to
8 - ELECTRICAL/VEHICLE THEFT SECURITY -
STANDARD PROCEDURE - SENTRY KEY TRAN-
SPONDER PROGRAMMING).
The SKIS performs a self-test each time the igni-
tion switch is turned to the On position, and will
store fault information in the form of Diagnostic
Trouble Codes (DTC's) in SKIM memory if a system
malfunction is detected. The SKIM can be diagnosed,
and any stored DTC's can be retrieved using a
DRBIII scan tool. Refer to the appropriate diagnos-
tic information.
STANDARD PROCEDURE - PCM/SKIM
PROGRAMMING
CAUTION: ASSURE THE DRBIII IS PROGRAMMED
WITH THE LATEST VERSION OF CURRENT SOFT-
WARE.
NOTE: Before replacing the PCM for a failed driver,
control circuit, or ground circuit, be sure to check
the related component/circuit integrity for failures
not detected due to a double fault in the circuit.
Most PCM driver/control circuit failures are caused
by internal component failures (i.e. relays and sole-
noids) and shorted circuits (i.e. pull-ups, drivers,
and switched circuits). These failures are difficult to
detect when a double fault has occurred and only
one DTC has been set.
When a PCM (JTEC) and the SKIM are replaced
at the same time, perform the following steps in
order:
(1) Program the new PCM (JTEC).
(2) Program the new SKIM.
(3) Replace all ignition keys and program them to
the new SKIM.
PROGRAMMING THE PCM (JTEC)
The SKIS Secret Key is an ID code that is unique
to each SKIM. This code is programmed and stored
in the SKIM, the PCM, and the ignition key tran-
sponder chip(s). When replacing the PCM, it is nec-
essary to program the secret key into the new PCM
using the DRBIII scan tool. Perform the following
steps to program the secret key into the PCM.
(1) Turn the ignition switch to the On position
(transmission in Park/Neutral).
(2) Use the DRBIII
SKIM, then MISCELLANEOUS.
(3) Select PCM REPLACED (GAS ENGINE).
(4) Enter secured access mode by entering the
vehicle four-digit PIN.
(5) Select ENTER to update PCM VIN.
NOTE: If three attempts are made to enter secured
access mode using an incorrect PIN, secured
access mode will be locked out for one hour. To
exit this lockout mode, turn the ignition switch to
the ON position for one hour, then enter the correct
PIN. (Ensure all accessories are turned off. Also
monitor the battery state and connect a battery
charger if necessary).
(6) Press ENTER to transfer the secret key (the
SKIM will send the secret key to the PCM).
(7) Press PAGE BACK to get to the Select System
menu and select ENGINE, MISCELLANEOUS, and
SRI MEMORY CHECK.
(8) The DRBIII will ask, "Is odometer reading
between XX and XX?" Select the YES or NO button
on the DRBIII . If NO is selected, the DRBIII will
read, "Enter Odometer Reading (From I.P. odome-
ter)". Enter the odometer reading from the instru-
ment cluster and press ENTER.
PROGRAMMING THE SKIM
(1) Turn the ignition switch to the On position
(transmission in Park/Neutral).
(2) Use the DRBIII
SKIM, then MISCELLANEOUS.
and select THEFT ALARM,
and select THEFT ALARM,
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