PREVOST H3-41 Maintenance Manual page 324

SECTION 07: TRANSMISSION
FUNCTION
PID/SID
Gears 2/3
engagement
system
Gears 2/3
engagement
system
40
PA1621 Maintenance Manual All Series | January 2017
ERROR
FMI
J1587
Conditions to
Blocked set the fault
FMI12 engagement
code:
of 3:rd gear
-The 3:rd gear
can not engage
Conditions to
Blocked
set the fault
engagement
code:
of neutral
FMI7
-The neutral
gear (2:nd
gear (2:nd 3:rd
and 3:rd gear
gear cylinder)
cylinder)
can not engage
CONDITION SYMPTOM
Yellow lamp is
sent
Loss of torque
The 3:rd gear
will not be
selected by the
system for a
short while. After
five successful
gearshifts a new
attempt to use
3:rd gear may be
made
Yellow lamp is
sent
COMMENT
code on any of the 2/3
position sensor (SEPo23)
the valve for shift to 2:nd
gear the valve for shift to
3:rd gear
Detailed conditions to
activate/deactivate
The following conditions
must be fulfilled three times
(only once 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 3:rd
gear is activated for at least
0.8s
- The 2/3 cylinder position
sensor indicates that 3:rd
position is not engaged
- There is no active fault on
any of the 2/3 position
sensor (SEPo23) the valve
for shift to 2:nd gear the
valve for shift to 3:rd gear
- There is no active fault
code for low air pressure
The fault is deactivated if
any of the following
conditions are fulfilled:
- The 2/3 position sensor
indicates that 3:rd position is
engaged
- There is an active fault
code on any of the 2/3
position sensor (SEPo23)
the valve for shift to 2:nd
gear the valve for shift to
3:rd gear
Detailed conditions to
activate/deactivate
The following conditions
must be fulfilled three times
(only once 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
gear (2:nd and 3:rd gear
cylinder) is activated for at
least 0.8s
- The 2/3 cylinder position
sensor indicates that neutral
position is not engaged
- There is no active fault
code on any of the 2/3
position sensor (SEPo23)
the valve for shift to 2:nd
gear the valve for shift to
3:rd gear
- There is no active fault
code for low air pressure
The fault is deactivated if