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...

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...