Gehl V270 - Page 68

64 917387/BP0310
Engine Diagnostic Chart (cont.)
No. Item
Failure detection
conditions
Operation when failure occurs
Action/
condition for
recovery
Category
Number
of
flashes
1 Coolant tempera-
ture sensor failure
Sensor voltage is
4.8 V or more, or
0.2 V or less.
Engine runs with a coolant temperature of
30°C.
Correct failure. Always
enable
4
2 Accelerator sensor
failure
Sensor voltage is
4.6 V or more, or
0.2 V or less.
[Without optional backup accelerator sensor]
Engine runs at 1500 min
-1
. (Option can
change)
[With optional backup accelerator sensor]
Select backup accelerator sensor: No
limitation
Backup accelerator sensor failure: Engine
runs at 1500 min
-1
.(Option can change)
Correct failure. Default to
disable
5
3 Speed sensor
failure
Engine start signal
(E8) is on, but the
engine speed is
zero.
[With optional backup speed sensor]
Backup speed sensor becomes active;
speed is limited to 1800 min
-1
.(Option can
change)
Backup speed sensor failed: Engine stops.
[Without optional backup speed sensor]
Engine stops.
Turn key off. Always
enable
6
Engine speed
decreases by 480
min
-1
or more in 40
ms.
4 Rack position
sensor failure
Correlation
between rack actu-
ator output and rack
position exceeds
threshold upper
limit by 0.32 sec. or
more.
Engine runs with limited output and speed.
(Rack position control is inactive and speed
control is active).
Turn key off. Always
enable
7
Correlation
between rack actu-
ator output and rack
position exceeds
threshold lower limit
by 0.16 sec. or
more.
5 Rack actuator
failure
Rack actuator cur-
rent is too high.
Engine stops. Turn key off. Always
enable
8
Rack actuator cur-
rent is too low.
Engine accelerates
with minimum rack
actuator output.
Engine stalls while
rack position sensor
is failed.
6 Overspeed
Idling engine speed
exceeds high idling
speed plus 600 min
-1
.
Engine stops. Turn key off. Always
enable
9