Owner`s manual

The function of an automotive transmission, is
to provide a means of matching engine speed
and vehicle speed in such a way that the
engine is kept in the most efficient RPM range
at all times.
HYDRAULIC CONTROL
In your INFINITI transmission, hydraulic flow
and pressure are under the control of an
electronic control unit which uses information
from a number of sensors to calculate the
most efficient gear ratio. The control unit
selects the proper gear, it directs fluid to
actuate the appropriate clutches, it controls
fluid pressure precisely to allow smooth,
shock-free shifts, and it controls the timing of
torque converter lock-up.
Automatic Transmission Control
Functions
Using the information provided by the sen-
sors, the control unit calculates the best
possible operation of the transmission for any
condition by controlling the following func-
tions:
1. Shift timing.
2. Lock-up timing.
3. Engine brake operation timing.
Self Diagnosis
Any electrical malfunction in the system will
be sensed by the automatic transmission
control unit, which stores the information in
memory.
TECHNICAL AND CONSUMER INFORMATION
9-8
Z 96.12.20/ X