There is a specific DRB manual for Chrysler Diagnostic Tool Crossfire. In this article I share: PCM /skreem programming, programming the sentry key remote entry module, transmitter programming, sentry key verification test etc.
PCM/SKREEM programming with DRB III scan tool
STANDARD PROCEDURE – PCM/SKREEM PROGRAMMING
Note: Before replacing the PCM, be sure to check the related component/circuit integrity for failures not
detected due to a double fault in the circuit. Most PCM failures are caused by internal component failures
(i.e. relays and solenoids) 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 Powertrain Control Module (PCM) and the Sentry Key Remote Entry Module (SKREEM) are replaced at the
same time, perform the following steps:
1. Using the DRB III scan tool, follow the on screen instructions to program the new PCM.
2. Using the DRB III, follow the on screen instructions to program the new Sentry Key Remote Entry Module.
3. Replace all ignition keys and program them to the new Sentry Key Remote Entry Module.
ZH ELECTRONIC CONTROL MODULES – SERVICE INFORMATION 8E – 77
PROGRAMMING THE PCM
The Sentry Key Remote Entry System Secret Key is an ID code that is unique to each Sentry Key Remote Entry
Module. This code is programmed and stored in the Sentry Key Remote Entry Module, the PCM, and the ignition
key transponder chip(s). When replacing the PCM, the DRB III will program the secret key into the new PCM.
Note: If three attempts are made to enter secure 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/RUN 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).
PROGRAMMING THE SENTRY KEY REMOTE ENTRY MODULE
Note: Be sure to enter the correct country code. If the incorrect country code is programmed into the Sentry Key Remote Entry Module, it cannot be changed and the Sentry Key Remote Entry Module must be replaced.
1. Program ignition keys to the Sentry Key Remote Entry Module.
Note: If the PCM and the Sentry Key Remote Entry Module are replaced at the same time, all vehicle ignition
keys will need to be replaced and programmed to the new Sentry Key Remote Entry Module.
PROGRAMMING IGNITION KEYS TO THE SENTRY KEY REMOTE ENTRY MODULE
Note: A maximum of eight keys can be learned to each Sentry Key Remote Entry Module. Once a key is
learned to an Sentry Key Remote Entry Module it (the key) cannot be transferred to another vehicle.
1. Obtain ignition keys to be programmed from the customer (8 keys maximum).
2. Using the DRB III, erase all ignition keys.
3. Program all of the ignition keys.
If ignition key programming is unsuccessful, the DRB III will display a failure message.
The Sentry Key Remote Entry Module (SKREEM) has the following functions: receiving and evaluating the Radio
Frequency (RF) keyless entry remote signal, actuation of door locks in conjunction with the Central Locking Pump/
Security System Module, and enabling the vehicle theft security alarm with confirmation via the turn signals. When
the RKE transmitter is operated, an RF signal is transmitted. If the SKREEM recognizes the RF signal as valid, it
actuates the Central Locking Pump/Security System Module through the Body Control Module. The vehicle is then
locked or unlocked through the power locks system. Connected to the SKREEM is a Sentry Key Antenna Ring
which surrounds the ignition lock cylinder. When the ignition is switched on, the Sentry Key Antenna Ring is supplied
with power. A data block is transmitted inductively via the Sentry Key Antenna Ring to the SKREEM and then
on to the Powertrain Control Module. If the antenna ring data block content is invalid or if vehicle battery power is
too low to build up enough power for the antenna ring, the Powertrain Control Module will not receive the proper
signal. This is displayed with the message “Start Error” in the Instrument Cluster.
The SKREEM contains an RF transceiver and a microprocessor. The SKREEM transmits RF signals to and receives
RF signals from the ignition key transponder through a tuned Sentry Key Antenna Ring that is wired to the
SKREEM. If the Sentry Key Antenna Ring is not mounted properly around the ignition lock cylinder housing, communication
problems between the SKREEM and the ignition key may arise. These communication problems will
result in ignition key transponder-related faults. The SKREEM also communicates over the Controller Area Network
(CAN) data bus with the Powertrain Control Module (PCM), the Instrument Cluster, the Body Control Module (BCM),
and/or the DRB III scan tool.
The SKREEM retains in memory the ID numbers of any ignition key transponder that is programmed into it. For
added system security each SKREEM is programmed with a unique secret key code. This code is stored in memory,
sent over the CAN data bus to the PCM, and is encoded to the transponder of every ignition key that is programmed
into the SKREEM.
In the event that a SKREEM replacement is required, the secret key code can be transferred to the new SKREEM
from the PCM using the DRB III scan tool and the ignition key system replacement programming procedure.
Proper completion of the ignition key system initialization will allow the existing ignition keys to be programmed into
the new SKREEM so that new keys will not be required. In the event that the original secret key code cannot be
recovered, SKREEM replacement will also require new ignition keys. The DRB III scan tool will alert the technician
during the key reprogramming procedure if new ignition keys are required.
The sentry key system performs a self-test each time the ignition switch is turned to the ON/RUN position and will
store fault information in the form of Diagnostic Trouble Codes (DTCs) in SKREEM memory if a system malfunction
is detected. The SKREEM can be diagnosed and any stored DTCs can be retrieved using a DRB III scan tool.
Refer to the appropriate diagnostic information.
STANDARD PROCEDURE – TRANSMITTER PROGRAMMING
The Remote Keyless Entry Transmitter(s) can be programmed by the customer without special tools.
Transmitter programming by the customer is done by performing the following steps:
1. Insert the key into the ignition switch.
2. Press either the lock or unlock button momentarily twice.
3. Turn the key in the ignition switch to the ON/RUN position within 30 seconds.
SENTRY KEY VERIFICATION TEST
Turn the ignition off.
Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
Note: If the SKREEM or the PCM was replaced, refer to the service information for proper programming
With the DRB III, erase all Diagnostic Trouble Codes (DTCs) from ALL modules. Operate all functions of the system
that caused the original complaint.
Perform 5 ignition key cycles leaving the key on for at least 90 seconds per cycle.
Turn the ignition off and wait 5 seconds. Turn the ignition on and using the DRB III, read DTCs from ALL modules.
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