BELARUS-
1523/1523В
/1523.3
/1523В.3
Troubleshooting
238
Defect
code
Description and pos-
sible cause of the
defect
Method of diagnostics and remedy
this, it is necessary to start the engine). If no voltage is
present at the terminal, check the reliability of connec-
tion of the wire to the safety fuse and intactness of the
safety fuse. The safety fuse is located in the safety fuse
box. The safety fuse is energized after the engine is
started.
15
Fault of external
control buttons.
Short-circuit of
wires or locking of
one of the external
control buttons; at
the same time, the
hitch leverage
starts to lift or
drops immediately
after the engine is
started.
Check the bundles from the external control buttons for
mechanical damage. Switch off the buttons one by one
until the defect disappears. When switching off the but-
tons, the engine shall be stopped. Should the defect not
disappear when the buttons are OFF, it would be nec-
essary to disconnect the connector assembly from the
electronic unit and test terminals (10) and (12), (20) and
(12) for short-circuiting using a tester (see the electric
connecting diagrams of the RHL control systems in Sec-
tion “Appendices”).
16
Fault in the elec-
tronic unit.
The stabilized
supply voltage
used to energize
the control panel is
below the level re-
quired. Short-
circuit in the RHL
draft and position
sensor connector
assembly due to
ingress of water
onto the terminal
contacts.
Disconnect the common bundle from the main control
panel. Measure the stabilized supply voltage at pins (6)
(minus) and (4) (plus) of the main control panel (see the
electric connecting diagrams of the RHL control systems
in Section “Appendices”), which shall be 9.5-10 V (the
engine shall be running). If the supply voltage is too low
or absent, it is necessary to check the reliability of con-
nection of the electronic unit connector assembly. Dis-
connect the RHL draft/position sensors one by one.
22
Fault in the posi-
tion sensor. The
sensor wire is bro-
ken or the sensor
is not connected.
Check to see that:
•
the electric connector assembly is reliably plugged in
to the position sensor;
•
the bundle connected to the sensor is free of me-
chanical damages;
•
the RHL eccentric is properly located, i.e. at the
maximum drop of the RHL the sensor shall be squeezed
to its “min” position, and vice versa;
•
the position sensor is properly adjusted (if the fault
becomes apparent with the RHL in its bottom position,
the sensor should be screwed in, and if in its top posi-
tion, the sensor should be screwed out).
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