DRESSTA TD-25M EXTRA, Service Manual, Page: 295 / 595

ELECTRICAL
SECTION 8
Page 19
DRESSTA TD-25M EXTRA
WIRING DIAGRAM
•
when the actual gear was the third gear – the controller will do nothing, the display will
continue to show “3”, the third gear solenoid valve
EZ3
will energize while that for the
second gear will not, the
L16
diode will come on, and
L17
and
L18
will come off.
Similarly for downshift, the controller is to behave as described below:
•
when the actual gear was the third gear – the display will change from “3” to “2”, diode
L16
will come off and
L17
will come on, the second gear solenoid valve
EZ2
will energize, while
that for third gear
EZ3
will de-energize;
•
when the actual gear was the second gear – the display will change from “2” to “1”, diode
L17
will come off and
L18
will come on, the second and third gear solenoid valves
EZ2
and
EZ3,
respectively will de-energize;
•
when the actual gear was the first gear – the controller will do nothing, the display will
continue to show “1”, the second and third gear solenoid valves
EZ2
and
EZ3
, respectively
will de-energize, the
L18
diode will come on, and
L17
and
L16
will come off.
b. Auto downshift mode
Auto downshift mode is provided with a higher priority in the gear change system.
WO
switch
(position „I” at the instrument panel) is used to activate this function; this is accompanied with
a yellow diode
L25
coming on. Figure 8.1C sketches all components and their setup for this
function to be operative.
Fig. 8.1C. Auto Downshift Mode and Components Setup Schematic
WO – Auto Downshift Mode Switch
CIW – Torque Converter Output RPM Magnetic Switch
CS – Engine RPM Magnetic Switch
ST – Electronic Controller
D – Display
EZ2 – 2nd Gear Solenoid Valve
EZ3 – 3rd Gear Solenoid Valve