PREVOST H3-41 Maintenance Manual page 319

FUNCTION
PID/SID
Gears 1/R
engagement
PSID25
system
Gears 1/R
engagement
system
ERROR
FMI
J1587
Conditions to
set the fault
code:
Unintentional
-The 1/R cylinder
FMI0 disengageme leaves the 1:st
nt of 1:st gear position
-The 1:st
cylinder valves
are inactive
Conditions to
set the fault
code:
Unintentional
-The 1/R gear
disengageme
FMI1 leaves the
nt of reverse
reverse position
gear
-The 1/R cylinder
valves are
inactive
PA1621 Maintenance Manual All Series | January 2017
SECTION 07: TRANSMISSION
CONDITION SYMPTOM
Yellow lamp is
sent
Loss of torque
Yellow lamp is
sent
Loss of torque
COMMENT
any of the gearbox brake
valve (VAGB)
the sensor for the counter
shaft speed (SECS) the
sensor for the split cylinder
position (SEPoS) low air
pressure. The following
conditions must be fulfilled
for one activation of the
gearbox brake in order to
deactivate:
- The minimum value of the
derivative of the
countershaft speed during
the activation is greater than
-1000rpm/s
The fault is also deactivated
if there is an active fault on
the countershaft speed
sensor (SESC), on the
gearbox brake valve
(VAGB), or the split position
sensor (SEPoS)
Detailed conditions to
activate/deactivate
The following conditions
must be fulfilled three times
(only one time if the fault
code filter is switched OFF)
in a row in order to set the
fault code:
(engagement of another
gear will reset the count)
- The 1/R cylinder position
indicates that the 1/R gear
leaves the 1:st position
- The 1:st cylinder valves
are inactive
- There is no active fault on
any of the sensor for the
position of the 1/R cylinder
(SEPo1R) the valve for shift
to 1:st gear the valve for
shift to reverse gear
- There is no active fault
code for low air pressure
Note: The fault will always
have the state inactive.
Check the fault count and
last occurrence to get more
information.
Detailed conditions to
activate/deactivate
The following conditions
must be fulfilled three times
(only one time if the fault
code-filter is switched OFF)
in a row in order to set the
fault code:
(engagement of another
gear will reset the count)
- The 1/R cylinder position
indicates that the 1/R gear
leaves the reverse position
- The 1/R cylinder valves
are inactive
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