Summit Wagon AWD L4-2350cc 2.4L SOHC (1995)
Control Module: Description and Operation
Engine And Transaxle Total Control Signal Circuit
PURPOSE
To provide better transaxle shifting and limit traction loss during acceleration.
LOCATION
The units are both located under behind the center console.
OPERATION
There are 3 communication lines providing torque reduction request and torque reduction execution (retared timing) signals. They connect the
engine control module (ECM) with the transaxle control unit (TCU). Two of these lines send 5 Volts from the ECM to the TCU. The other
provides 5 Volts from the TCU to the ECM.
Communication between control units is accomplished by switching ground circuits of the 5V reference signal "ON" or "OFF" as determined by
the proper control unit for driving conditions.