RE5R05A
Computer Diagnostics
There are two separate
controller systems that are used for the RE5R05A transmission applications.
The TCM and the ECM are
separate controllers that share information through a multiplex type
system.
The TCM is located in the
transmission on the later vehicles and on the right kick panel on earlier
model vehicles. The TCM
includes all of the Transmission electronics, the TCM, Solenoids, TRS,
ISS, OSS and Pressure switch
circuit board. This makes diagnosing
the RE5R05A difficult if you
don’t have the correct scan tool or the proper adapters for the scan tool.
The Function of the TCM is
to:
Receive information from the
input signals sent from the various switches and sensors mounted
on the transmission and
share information from the ECM.
Determine required
pressures, shift points, lock-up operation, and engine breaking operation
based on the various switches
and sensors.
TCM Function
The TCM is constantly
learning, this is called adaptive strategy. During this process the TCM is con-
stantly monitoring the
driving conditions and driver behavior.
Adaptive Strategy allows the
customer to feel a flawless shift until the transmission is not capable of
that shift. Typically this
is at about the 75,000-100,000 mile marker. During and up until that time of
repair the TCM is constantly
raising and lowering pressures.
This could cause you
problems after an overhaul, if the computer is not reset.
NOTE: It is always
recommended to reset the adaptive strategies before test driving the vehicle
after
overhaul.
TRANSMISSION
EXCHANGE CO is located at 1803 NE MLKing Blvd.,
Portland, OR 97212. Ph. 503-284-0768, 800-776-1191 Fax 503-280-1655 E-mail mail@txchange.com
