VM Motori MR704LX - INFORMATION ABOUT FAILURES; Troubleshooting Overview

MR 700
47
Ed. 3 - 2012_11
English
INFORMATION ABOUT FAILURES
TROUBLESHOOTING
The information below are provided to
facilitate the identication and solution
of possible anomalies and failures which
may occur during operation.
Some of these problems can be solved
by the user, while others require specic
technical skills or abilities, therefore they
should be exclusively dealt with by quali-
ed technicians with extensive experience
in the specic sector of intervention.
Problem Cause Remedy
During the ignition phase
the control board and the
engine do not start.
Flat battery Recharge or replace battery
Fuse “triggered”
Reset the fuse (see “Reset
fuses”)
The electric cables are discon-
nected or they do not guarantee
continuity
Check the electric connections
Failure of engine revolution
sensor
Replace the sensor Apply to an
authorised workshop
The engine does not
start
Presence of air in the fuel supply
circuit
Carry out bleeding (see “Fuel
supply circuit bleeding”)
Dirty or faulty injectors
Clean or replace injectors Apply
to an authorised workshop
The injection pump is set incor-
rectly or is faulty
Adjust the pump or replace it Ap-
ply to an authorised workshop
Failure of the start control
Replace the start control Apply to
an authorised workshop
Fuse “triggered” Reset the fuse (see “Reset fuses”)
The starter motor runs
idle
The engine starting relay is not
connected correctly or is faulty
Replace the relay Apply to an
authorised workshop
Electromagnet failure
Check the starter motor Apply to
an authorised workshop
The starter motor is not
running
Flat battery Recharge or replace battery
Interrupted electric connection Check the electric connections
Worn brushes
Replace the worn brushes Apply
to an authorised workshop
Fuse “triggered”
Reset the fuse (see “Reset
fuses”)
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