MAZ 631236 - Page 49

Table 7 – possible disrepairs and ways of repair
Visual manifestation Reason Ways of repair
1 2 3
1.1 Supply absence of the
interface electronic block
(VECU block)
It is necessary to check supply
safety devices of the block and
the system and change them if
necessary.
1.2 Wiring or control lamps
are out of order, connectors
contact is broken.
It is necessary to check wiring,
control lamps, connectors and to
eliminate faultiness.
1 Control lamps of the
engine ECS and SCR
system don’t switch on
during turning the switch
key of the ignition to the
position “DEVICES”. The
other lamps are alight.
1.3 Interface block is out of
order.
It is necessary replace interface
block
2.1 One of the gear-boxes is
switched on.
It is necessary to set the gearshift
in the neutral position.
2.2 Low tension of the battery It is necessary to check the state
of the battery, to recharge or to
change the battery
2.3 Dangerous oil pressure
fall. Overheating of the
engine.
It is necessary to check oil
pressure and oil level in the
engine.
2.4 Starter or relay of the
starter is out of order.
It is necessary to check the
starting circuit and eliminate
faultiness.
2.5 Control shaft sensor is out
of order.
It is necessary to check control
shaft sensor, its electric circuit
and eliminate faultiness.
2.6The contact of bundle
connector of the ECS engine
and cabin is out of order.
It is necessary to check
reliability of the ECS bundle
connection of the engine to the
cabin.
2 The engine doesn’t start
2.7 Electronic engine block is
out of order
It is necessary to change
electronic engine block.