Transmission Control Systems: Description and Operation

A750E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: SYSTEM DIAGRAM

The configuration of the electronic control system in the A750E automatic transmission is as shown in the following chart.










A750E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: SYSTEM DESCRIPTION

1. SYSTEM DESCRIPTION

(a) The ECT (Electronic Controlled automatic Transmission) is an automatic transmission that electronically controls shift timing using the ECM. The ECM detects electrical signals that indicate engine and driving conditions, and controls the shift point, based on driver habits and road conditions.

Shift shock is reduced by controlling the engine and transmission simultaneously.

In addition, the ECT has the following features:

* Diagnostic function.

* Fail-safe function when a malfunction occurs.