Ducati Monster 696 2009 Manual page 696

section
P 9
Measurement of resistance values and electrical continuity
A
Resistance measurements must be taken only when the electrical device or section of the circuit is not powered and isolated
from the main electrical system (i.e. not connected to the main electrical system). These measurements can be utilised to check
the resistance value across several sensors. For example, after disconnecting the electrical wiring to the rpm/ignition-injection
system timing sensor (on the camshaft drive gear) the relative internal resistance can be checked by connecting a multimeter to
its terminals. This makes it possible to check the electrical continuity of the winding inside the sensor (a reading of infinite
resistance indicates that the winding is interrupted). Resistance measurement can also be used to check the continuity of
B
sections of the electrical circuit or relay type switches. For example, to check the condition of a section of the electrical circuit
between two connections, disconnect the connections and connect the terminals of the multimeter to the ends of the electrical
cable in question to check that the specified resistance value is present. If this value is close to zero (i.e. lower than approximately
0.3 ohm) this means that the cable is not interrupted. Some instruments feature an audible signal that is emitted when the
resistance approaches a value of zero. The same procedure must be adopted to check whether, for example, two contacts of
a switch (relay or manual type) are making the contact correctly when closed. In this case the terminals of the multimeter
C
must be connected to the switch terminals, checking that the resistance value is close to zero (or listening for the audible signal)
when the switch is closed. To check that the multimeter is functioning correctly in "electrical continuity test" mode, short
out the two test probes. The resistance value indicated must be almost nil and the audible signal must be activated.
Protections and precautions
D
The multimeter is equipped with protective fuses and batteries. These components must always be in perfect condition to ensure
that the instrument is functioning correctly. When making electrical measurements always use the maximum caution to avoid
short circuits, which can otherwise cause irreparable damage to the electrical system and constitute a personal injury hazard.
All maintenance work must be performed exclusively when the system is not live (disconnect the battery in advance).
NEVER connect the multimeter in parallel to make current measurements, and NEVER connect it in series to carry out
voltage measurements.
E
F
G
H
L
M
N
P
106
Electrical system
Monster 696/696+ - M.Y. 2009 - edition 00