Yamaha Fz6n Manual

8-3
CHECKING SWITCH CONTINUITYELEC
CAUTION:
NOTE:
NOTE:
EAS00730
CHECKING SWITCH CONTINUITY
Check each switch for continuity with the pocket
tester. If the continuity reading is incorrect,
check the wiring connections and if necessary,
replace the switch.
Never insert the tester probes into the cou-
pler terminal slots. Always insert the probes
from the opposite end of the coupler 
1 tak-
ing care not to loosen or damage the leads.
Pocket tester
90890-03112, YU-3112

Before checking for continuity, set...

8-4
11Oil level switch
12Neutral switch
13Rear brake light switch
14Fuse box
1Main switch
2Horn switch
3Dimmer switch
4Turn signal switch
5Clutch switch
6Hazard switch
7Sidestand switch
8Engine stop switch
9Front brake light switch
10Start switch
CHECKING THE SWITCHESELEC
EAS00731
CHECKING THE SWITCHES
Check each switch for damage or wear, proper connections, and also for continuity between the termi-
nals. Refer to “CHECKING SWITCH CONTINUITY”.
Damage / wear 
 Repair or replace.
Improperly connected 
...

8-5
CHECKING THE BULBS AND BULB SOCKETSELEC
WARNING
EAS00732
CHECKING THE BULBS AND
BULB SOCKETS
Check each bulb and bulb socket for damage or
wear, proper connections, and also for continu-
ity between the terminals.
Damage / wear 
 Repair or replace the bulb,
bulb socket or both.
Improperly connected 
 Properly connect.
No continuity 
 Repair or replace the bulb, bulb
socket or both.
TYPES OF BULBS
The bulbs used on this motorcycle are shown in
the illustration on the left.

Bulbs 
A and B are used for...

8-6
CHECKING THE BULBS AND BULB SOCKETSELEC
CAUTION:
NOTE:

Be sure to hold the socket firmly when re-
moving the bulb. Never pull the lead, other-
wise it may be pulled out of the terminal in
the coupler.

Avoid touching the glass part of the head-
light bulb to keep it free from oil, otherwise
the transparency of the glass, the life of the
bulb, and the luminous flux will be adverse-
ly affected. If the headlight bulb gets soiled,
thoroughly clean it with a cloth moistened
with alcohol or lacquer...

8-7
CHECKING THE BULBS AND BULB SOCKETSELEC
NOTE:
NOTE:
WARNING
Pocket tester
90890-03112, YU-3112
Check each bulb socket for continuity in the
same manner as described in the bulb section;
however, note the following.
a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the re-
spective leads of the bulb socket.
c. Check the bulb socket for continuity. If any of
the readings indicate no continuity, replace
the bulb socket.
CHECKING THE LEDs
The following procedures applies...

8-8
1Main switch
6Fuse (main)
9Battery
10Starting circuit cut-off relay
11Sidestand switch
12Neutral switch
16Lean angle cut-off switch
17Crankshaft position sensor
20ECU
27Ignition coil #1 and #4
28ignition coil #2 and #3
29Spark plug
40Engine stop switch
47Fuse (ignition)
54Clutch switch
IGNITION SYSTEMELEC
EAS00735
IGNITION SYSTEM
CIRCUIT DIAGRAM 

8-9
YESNO 2. Battery

Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20C (68F)

Is the battery OK?

Clean the battery
terminals.

Recharge or re-
place the battery.
EAS00739
YESNO
EAS00741
3. Spark plugs
The following procedure applies to all of the
spark plugs.

Check the condition of the spark plug.

Check the spark plug type.

Measure the spark plug gap.
Refer to “CHECKING THE SPARK PLUGS”
in chapter 3....

8-10
IGNITION SYSTEMELEC
NOYES
1
a
2
4. Ignition spark gap
The following procedure applies to all of the
spark plugs.

Disconnect the spark plug cap from the
spark plug.

Connect the ignition checker   and spark
plug cap   as shown.

Set the main switch to “ON”.

Measure the ignition spark gap  .

Crank the engine by pushing the starter
switch and gradually increase the spark gap
until a misfire occurs.
Minimum ignition spark gap
6 mm (0.24 in)

Is there a spark and is the spark gap within...

8-11
IGNITION SYSTEMELEC
Negative tester probe 
 
spark plug lead 
Positive tester probe 
 
spark lug lead 
1
2

Measure the secondary coil resistance.
Secondary coil resistance
12  18 kΩ at 20C (68F)

Is the ignition coil OK?
YESNO
Replace the ignition
coil.
7. Crankshaft position sensor resistance

Disconnect the crankshaft position sensor
coupler from the wire harness.

Connect the pocket tester (Ω 
 100) to the
crankshaft position sensor coupler as shown.
Positive tester probe 
 gray
Negative...

8-12
IGNITION SYSTEMELEC
EAS00752
11. Sidestand switch

Check the sidestand switch for continuity.
Refer to “CHECKING THE SWITCHES”.

Is the sidestand switch OK?
YESNO
Replace the side-
stand switch.
EAS00763
12. Clutch switch

Check the clutch switch for continuity.
Refer to “CHECKING THE SWITCHES”.

Is the clutch switch OK?
YESNO
Replace the clutch
switch.
13. Starting circuit cut-off relay (diode)

Disconnect the starting circuit cut-off relay
coupler from the wire harness.

Connect the pocket tester...