PREVOST H3-41 Maintenance Manual page 320

SECTION 07: TRANSMISSION
FUNCTION
PID/SID
Gears 1/R
engagement
system
Gears 1/R
engagement
system
36
PA1621 Maintenance Manual All Series | January 2017
ERROR
FMI
J1587
Conditions to
set the fault
Unintentional
code:
disengageme
-The 1/R gear
nt of neutral
FMI2 leaves the
gear (1:st and
neutral position
reverse gear
-The 1/R cylinder
cylinder)
valves are
inactive
Conditions to
set the fault
code:
-The 1:st gear
can not engage
-There is no
active fault code
on the SEPo1R
Blocked
-There is no
FMI11 engagement
active fault code
of 1:st gear
for low air
pressure
-There is no
active fault code
on any of the
1:st and reverse
gear cylinder
valves
CONDITION SYMPTOM
Yellow lamp is
sent
Loss of torque
Yellow lamp is
sent
Loss of torque
The 1:st gears
will not be
selected by the
system for a
short while. After
five successful
gear changes a
new attempt to
use 1:st gear
may be made
COMMENT
- 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 neutral position
- The 1/R 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 valve for reaching 1:st
gear is activated for at least
0.8s
- The 1/R cylinder position
sensor indicates that 1:st
position is not engaged
- There is no active fault on
any of the 1/R position
sensor (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