PREVOST H3-41 Maintenance Manual page 317

FUNCTION
PID/SID
Clutch
system
Clutch
system
ERROR
FMI
J1587
4. There is no
active fault code
on any of the
clutch cylinder
valves and,
5. The PCB
temperature is
above 10 dgC
Deactivate: The
clutch response
is OK
Activate: The
clutch can not
transfer a
specific torque
Unintentional without slipping
FMI12
clutch slip Deactivate: The
clutch can
transfer a
specific torque
without slipping
Activate: The
clutch transfers
too much torque
in disengaged
position
FMI11 Clutch drag
Deactivate: The
clutch transfers
no torque in
disengaged
position
PA1621 Maintenance Manual All Series | January 2017
SECTION 07: TRANSMISSION
CONDITION SYMPTOM
Yellow lamp is
sent
The engine
torque is
reduced so that
the clutch does
not continue to
slip
Yellow lamp is
sent
The clutch wear
is high
COMMENT
in the interval [set point
+3mm; set point -1mm] after
control of the clutch to near
the slip point position during
1.0s
- The clutch position is more
than 2.5mm from the
engaged position, after
control of the clutch to the
engaged position during
1.0s
The fault is deactivated after
three successful
occurrences, of control of
the clutch to the requested
position in 0.5s
The fault is also deactivated
if
- There is an active fault on
the clutch position sensor
- There is an active fault on
any of the clutch valves
- There is an active fault
code for low air pressure -
The PCB temperature is
below 10 dgC
Detailed conditions
Activation:
- Clutch slip is detected
when the engine torque is
already reduced below the
"Clutch slip warning torque
level" in an attempt to
prevent clutch slip. The
clutch slip warning level is
2500Nm for MD16 (TMF)
variants and 2000Nm for
other variants (SMF)
- There is no active fault on
any of: the sensor for the
countershaft speed (SECS)
the sensor for the clutch
position (SEPoC) and the
engine torque & engine
speed is received from the
engine ECU
Deactivation:
The clutch can transfer the
maximum engine torque
without slipping
the fault is also deactivated
at startup of the system
Algorithm for
activation/deactivation
- Start the check when the
counter shaft has been
stopped with the brake
during slip point calibration
when the gearlever is in
neutral during normal
operation.
- Release the brake and
check the input shaft speed
after 0.5s if input shaft
speed > 300rpm, activate
this fault code if input shaft
33