Cagiva Navigator, Workshop Manual

Page: 50 / 407

C.6
INJECTION - AIR INTAKE SYSTEM
• Disconnect the negative polarity cable from the battery.
• Check to see if the connectors/couplings and both ends of the
circuit are not loose. Also check the snap-fit couplings for correct
insertion.
• Check the tightness of the female terminals of the circuit by using
a test male terminal.
Visually check each terminal for poor contacts (caused by dirt,
corrosion, rust, foreign bodies, etc.). Check that each terminal is
correctly inserted into the couplings.
If the terminal is loose, adjust it to increase the tightness or substi-
tute the terminal. They must be clean and free of corrosion that
could impede a good contact.
• Using the continuity and voltage testing procedure described as
follows, check for an open circuit or a poor contact of the wiring
terminals. Locate the defect and repair..
Continuity test
• Measure the resistance between the terminals of the coupling and
both ends of the circuit being tested (as indicated between posi-
tion A and C).
If no continuity is indicated (complete resistance or over the limit
of the scale), signifies that the circuit between terminals A and C is
open.
• Disconnect the coupling in the circuit (coupling B in the figure) and
measure the resistance between the terminals A and B.
If there is no continuity signifies that the circuit between the termi-
nals A and B is open. If continuity is indicated, the circuit is open
between the terminals B and C or the coupling B is defective.
Check to see if the connection is loose
1
1
Sensor
ECM
1
Check the contact pres-
sure by inserting and
removing the male ter-
minal once only
Check that each ter-
minal is aligned cor-
rectly and is not bent
2
1
3
1
2
3
Loose fitting
B
Open circuit
Worn lead (one thread left of the braiding)
C
A
A
C
B
ECM
ECM