Yamaha F200B, Service Manual

Page: 156 / 579

5-27
ELEC
Electrical system
Using the digital tester
The electrical technical data apply to the
measurements taken using the Yamaha-rec-
ommended tester.
The resistance values shown are the values
taken before the engine is started. The actual
resistance may vary depending on the envi-
ronmental conditions and ambient tempera-
ture.
The input voltage changes depending on the
battery voltage.
If the tester probe cannot be inserted into the
coupler, prepare a test lead suitable for the
measurement.
Engine control system and
component
Checking the main relay
1. Remove the intake manifold (STBD).
See “Removing the intake manifold” (6-
17).
2. Remove the fuse cover and relay cover,
and then remove the main relay
1
.
NOTICE: Be careful not to damage the
relay.
3. Connect the positive battery lead to the
terminal
a
, connect the negative battery
lead to the terminal
b
, and then check
for continuity between the terminals
c
and
d
. Replace the relay if there is no
continuity. NOTICE: Do not reverse the
battery leads.
4. Measure the input voltage between the
terminal
e
and ground, and the terminal
f
and ground.
Digital circuit tester: 90890-03174
Test lead:
Terminal, male
1
: (commercially
available)
Terminal, female
2
: (commercially
available)
1 2
Battery lead
Terminal
c d
Connect
C C C C C C C C
Disconnect
Main relay input voltage:
Terminal
e
–Ground
Terminal
f
–Ground
12.0 V (battery voltage)
1
a
b
d
c
e
f