Case 580SR Service Manual page 347

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FAULT CODE F9 AND F10 / DIRECTION
MODULATION OUTPUT SHORT OR OPEN
CIRCUIT
A fault on this output is considered as a problem po-
tentially reducing transmission life.
For this reason while a fault is persistent, the allow-
able direction change speed limit is decreased grad-
ually (10%) each time a direction change was
inhibited, down to a minimum of 20% of the maxi-
mum allowable shift speed.
After a while, this can result in a severely degraded
performance (only low speed reversals are possi-
ble), but it has the advantage that the driver cannot
be surprised by a sudden performance loss, which
could constitute a safety hazard in itself.
Direction Modulation Solenoid (E03) Pin T
The variable Current solenoid for direction modula-
tion is connected to the modulation Common Plus
(Pin K) at one side and to (Pin T) at the other side.
A programmable current is increased or reduced to
the solenoid controlling the modulating pressure.
No current corresponds to maximum pressure.
Approximately 1 Amp corresponds with no pressure.
SECTION 21 - TRANSMISSION
F N R
Blinks
6
Blinks
1 2 3 4 5 6
1 2 3 4
A
B
M
C N L
U
P
D
V
R T
S
E J
F H
G
Copyright ©
281
T N
Blinks Blinks
in Phase
7 8
F28368
1
K
2
F4296