DRESSTA TD-25M EXTRA, Service Manual

Page: 292 / 595

SECTION 8
ELECTRICAL
Page 16
TD-25M EXTRA DRESSTA
WIRING DIAGRAM
Table 8.1. Machine type code:
Machine Type
Deutsch connector pin voltage
providing power to controller [V]
LED ON
A H V
L20 L21 L19
TD-15M EXTRA 0 0 0 NO NO NO
TD-20M EXTRA 24 0 0 YES NO NO
TD-25M EXTRA 24 24 0 YES YES NO
TD-40E EXTRA 24 24 24 YES YES YES
•
L22
– ON, when the controller is fed with a pulse train coming from the torque converter
output CIW magnetic sensor; this pulse train is a must for correct operation of auto
downshift;
•
L23
– ON, when the controller is fed with a pulse train coming from the engine CS
magnetic sensor; this pulse train is a must for correct operation of auto downshift;
•
L24
– ON, when the machine type code wiring is faulty, being corrupted connection
integrity, at least at one lead to Deutsch connector pins A, H, V providing power to the
controller. Diodes
L19, L20
and
L21
dim will give a hint to which lead is at fault:
•
L20
– dim diode means that lead connection to pin A of controller Deutsch
connector is corrupted;
•
L21
– dim diode means that lead connection to pin H of controller Deutsch
connector is corrupted;
•
L19
– dim diode means that lead connection to pin V of controller Deutsch
connector is corrupted;
•
L25
– ON, when the auto downshift mode was activated –
WO
switch contacts shorted;
•
L26, L27
– not used;
•
L28
– ON, when „2/2” presetting mode II was activated;
•
L29
– ON, when „1/2” presetting mode I was activated;
3A.3. ELECTRONIC CONTROLLER OPERATION AFTER POWER UP
a. Power up with the control system operative
In order for the control system to operate correctly the following must be met:
- power ranging 18 [V] ≤ U ≤ 36
±
0.5 [V]
- EPD protection “ON”
- the system is fed with a pulse train coming from RPM magnetic sensors
- correct machine type coding.
b. Electronic controller operation after power up and prior to starting the engine
After power up to the controller, letter “L” is to display immediately on the display RH position at the
instrument panel with the machine equipped with a two speed steering drive, while the electronic
controller based green diode
L15
for a low range will come ON. After ca. one second the controller
processor is to end self test and to start the program execution. The LH position of two digit display
or single digit display is to show “1” (for machines equipped with a single speed steering drive,
while the electronic controller based green diode
L18
will come ON