MAZ 534035, Operation Manual

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Simplified diagnostics
According to the state of the controlling lamps a driver can define working capacity of the
electronic system of the engine control and the SCR system. Controlling lamps are placed on the
side shield (Fig.23) of the devices, composed of the indicator unit.
While turning the key of the ignition switch, the “Devices” must briefly switch on, and if there are
no any damages or disrepairs in the system, the lamps 1, 2, 4 and 5 must switch on (Fig. 23).
Repeated lightning of one of the listed lamps will indicate the presence of any disrepair.
Control lamp 1(red) shows that there are serious disrepairs in the engine control system.
Attention!
It is forbidden to start the engine when the control lamp is on with the sign EDC (item 1, Fig.
23)!
If the lamp switches on during the truck movement, it is necessary to stop the truck and kill the
motor. The truck movement is allowed only with the help of towing and the engine start is allowed
after removing of all disrepairs at a service center.
Control lamp 5 (yellow) warns a driver about disrepairs in the engine control system that are not
connected with the risk of breakage of the engine or the safety of traffic. So the further truck
movement is allowed and it is recommended to visit a nearby service center for the repair.
Control lamp 2 (yellow) warns about defects in the SCR system (neutralization of exhaust gases).
It is allowed to continue the truck movement and it is recommended to visit a nearby service center
in order to clear the defects.
Control lamp 4 (green) warns about low level of ammoniac solution in the AdBlue tank. It is
recommended to fill the tank with the ammoniac solution (AdBlue) at a specialized refueling station
equipped with the AdBlue fuel filling column.
Control lamp 3 (green) informs about the location of the gear-change lever of the gear box in
neutral position. When one of the gear is switched on - the lamp goes out.
To start the engine it is necessary to fix the gear-change lever in neutral position, otherwise
the engine won’t start!
Full diagnostics
Full diagnostics of the system is held with the help of specialized diagnostic equipment at a certified
service center. The trucks, that have the lamps 1, 2 or 5 switched on, are liable to full diagnostics. In
order to hold the full or computer diagnostics of the engine and its systems the truck has two special
diagnostic connectors, one of them is placed under the middle cover of the facia (Fig.23), the latter
one (OBD connector) is placed in the bottom of the facia on the right side opposite the passenger
seat (Fig.22).