Go With God
Chrysler and Jeep Vehicles
have many Modules that Auto Configure.
New and Rebuilt OEM modules are not configured out of the box. At every key on
cycle these modules look on the vehicles network to find all other communicating
modules. Then it is determined how every module is configured, and using this information
the new module "auto configures" to allow it to work properly with the vehicles systems.
This is often called "Plug and Play". Then additional Initializing and Programing is
performed by C & e.
This can and does lead to critical issues if a tech installs a used module for test
If a module out of another vehicle is installed for test purposes, on the next key cycle
all modules may rewrite this new VIN and other variant files to match. One or more
modules may have to be replaced if this occurs. These "was" working modules,
programming may not salvage them. You will now have several shiny door stops.
A PCM is the only module that (in most cases) can be swapped out for test purposes
with out damaging other modules. But, nine out of ten vehicles have an immobilizer
system that will prevent the used PCM module from starting, so it may be a wast
of diagnostic time. Call for details.
As a general rule of thumb, when working on non Can Network vehicles
it is critical to not plug in a used BCM or ABS module.
Can Network vehicals are very susceptible to damage. The PCM can be
swapped out with a used one, but now a Factory OEM scanner must be used
to rewrite the VIN, setup the Immobilizer and program it to the most current
calibration. Then perform reconfiguration on several modules.
Warning on CAN Network vehicles
If any other module is swapped out with a used one, system damage will
occur. Call for details.
Finding a list of which vehicles have a Can Network and which ones do not,
is hard to locate. Below is a chart listing what models first had a Can Network
and the year. Hope it helps.
Town & Country
Critical Information on Chrysler and Jeep Modules
C& e Auto Tech