7.8 ELECTRONIC CARD OPERATION CHECK
A) Card power supply
To make this test it is necessary to have:
– The key in the «ON» position
– Connectors CN1 and CN2 disconnected
(1)
All the pilot lamps except those for fuel and oil should
light up in this situation.
B) Safeties and services check
This check is made with the tester operating as a Volt-
meter (Volts DC 0÷20), with the black prod on earth
and the red one on the following terminals of connec-
tors CN1 and CN2 of the card
(2)
and must give the
following readings:
Gr. catcher attached microsw. = Terminal 7
4 - 6 V
Operator present
= Terminal 3
4 - 6 V
Brake microswitch
= Terminal 2
0 - 3 V
Blades microsw.(or pushbutton) = Terminal 1
0 - 3 V
“Neutral” signal
= Terminal 8 10-12 V
Grasscatcher full microswitc
= Terminal 9 10-12 V
Fuel warning light
= Terminal 4
0 - 1 V
C) Pilot lamps switch-on test
Making a bridge between the following terminals of
connectors CN1, CN2 and CN4
of the card (3)
should produce the following effects:
Gr.-catcher warning light = Terminals 6 - 7 off
Seat warning light
= Terminals 6 - 3 off
Brake warning light
= Terminals 6 - 2 off
Blades warning light
= Terminals 6 - 1 off
Fuel warning light
= Terminals 6 - 4 on
Oil pressure warning light
= Terminals 17-14 on +
buzzer
“Neutral” warning light
= Terminals 17 - 8 off
D) Self-resetting protection operation check
For this test, put everything in the same situation as in
point «
A
».
On connecting terminal 6 of connector CN2
of the
CN4
18
17
16
15
14
1
2
3
4
5
13 12 11 10
9
8
7
6
CN3
CN2
CN1
4
9
8
7
6
5
3/2002
CN4
18
17
16
15
14
1
2
3
4
5
13 12 11 10
9
8
7
6
CN3
CN2
CN1
3
9
8
7
6
5
4
3
2
1
3
3
18
17
16
15
14
CN4
18
17
16
15
14
1
2
3
4
5
13 12 11 10
9
8
7
6
CN3
CN2
CN1
2
9
8
7
6
5
4
3
2
1
2
CN4
18
17
16
15
14
1
2
3
4
5
13 12 11 10
9
8
7
6
CN3
CN2
CN1
1
9
8
7
6
5
4
3
2
1
1
102 - 122
7.8
.
0
- ELECTRONIC CARD OPERATION CHECK
1 / 2
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2000
to
••••
WORKSHOP MANUAL
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