Yamaha Fz1n Service Manual

							
IMMOBILIZER SYSTEM
8-87
a. Light on
b. Light off 
						

							
IMMOBILIZER SYSTEM
8-88 
						

							
ELECTRICAL COMPONENTS
8-89
EAS27970
ELECTRICAL COMPONENTS 
						

							
ELECTRICAL COMPONENTS
8-90
1. Main switch (immobilizer unit)
2. Front brake light switch
3. Starter relay
4. Battery
5. Fuse box
6. Rear brake light switch
7. Neutral switch
8. Sidestand switch
9. Oil level switch
10.Radiator fan motor
11.Horn
12.Ignition coil 
						

							
ELECTRICAL COMPONENTS
8-91 
						

							
ELECTRICAL COMPONENTS
8-92
1. Coolant temperature sensor
2. Intake air temperature sensor
3. Intake air pressure sensor
4. Fuel pump
5. ECU
6. Lean angle sensor
7. Starting circuit cut-off relay
8. Headlight relay (on/off)
9. Radiator fan motor relay
10.Turn signal relay
11.Recifier/regulator
12.Throttle position sensor
13.Sub-throttle position sensor 
						

							
ELECTRICAL COMPONENTS
8-93
EAS27980
CHECKING THE SWITCHES 
						

							
ELECTRICAL COMPONENTS
8-94
1. Main switch
2. Horn switch
3. Dimmer switch
4. Pass switch
5. Turn signal switch
6. Hazard switch
7. Clutch switch
8. Sidestand switch
9. Engine stop switch
10.Front brake light switch
11.Start switch
12.Oil level switch
13.Neutral switch
14.Rear brake light switch
15.Fuse box
16.O
2 sensor 
						

							
ELECTRICAL COMPONENTS
8-95
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.
CAUTION:
ECA14370
Never insert the tester probes into the coupler terminal slots “1”. Always insert the probes 
from the opposite end of the coupler, taking care not to loosen or damage the leads.
NOTE:
 Before checking for continuity, set the pocket tester to “0” and to the “ Ω ×  1” range.
 When checking for continuity, switch back and forth between the switch positions a few times.
The switches and their terminal connections are illu strated as in the following example of the main 
switch.
The switch positions “a” are shown in the far left column and the switch lead colors “b” are shown in 
the top row.
The continuity (i. e., a closed circuit) between switch  terminals at a given switch position is indication 
by “ ” There is continuity between red, brown/blue, and brown/red when the switch is set to 
“ON” and between red and brown/red when the switch is set to “ ”.
Pocket tester 90890-03112
Analog pocket tester
YU-03112-C 
						

							
ELECTRICAL COMPONENTS
8-96
EAS27990
CHECKING THE BULBS AND BULB SOCK-
ETS
Check each bulb and bulb socket for damage 
or wear, proper connections, and also for conti-
nuity 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 vehicle are shown in 
the following illustration.
 Bulbs “a” and “b” are used for the headlights  and usually use a bulb holder that must be 
detached before removing the bulb. The 
majority of these types of bulbs can be 
removed from their respective socket by turn-
ing them counterclockwise.
 Bulbs “c” is used for turn signal and tail/brake 
lights and can be removed from the socket by 
pushing and turning the bulb counterclock-
wise.
Checking the condition of the bulbs
The following procedure applies to all of the 
bulbs.
1. Remove: Bulb
WARNING
EWA13320
Since the headlight bulb gets extremely 
hot, keep flammable products and your  hands away from the bulb until it has 
cooled down.
CAUTION:
ECA14380
 Be sure to hold the socket firmly when 
removing the bulb. Never pull the lead, 
otherwise it may be pulled out of the ter-
minal in the coupler.
 Avoid touching the glass part of the head- light bulb to keep it free from oil, other-
wise the transparency of the glass, the 
life of the bulb, and the luminous flux will 
be adversely affected. If the headlight 
bulb gets soiled, thoroughly it with a cloth 
moistened with alcohol or lacquer thin-
ner.
2. Check:  Bulb (for continuity)(with the pocket tester)
No continuity  → Replace.
NOTE:
Before checking for continuity, set the pocket 
tester to “0” and to the “ Ω ×  1” range.
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a. Connect the positive tester probe to termi-
nal “1” and the negative tester probe to ter-
minal “2”, and check the continuity.
b. Connect the positive tester probe to termi- nal “1” and the negative tester probe to ter-
minal “3”, and check the continuity.
c. If either of the readings indicate no continu- ity, replace the bulb.
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Checking the condition of the bulb sockets
Pocket tester90890-03112
Analog pocket tester YU-03112-C