Yamaha Fz1n Service Manual

ELECTRICAL COMPONENTS
8-97
The following procedure applies to all of the 
bulb sockets.
1. Check: Bulb socket (for continuity)(with the pocket tester)
No continuity  → Replace.
NOTE:
Check each bulb socket for continuity in the 
same manner as described in the bulb section; 
however, note the following.
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a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the 
respective leads of the bulb socket.
c. Check the bulb socket for continuity. If...

ELECTRICAL COMPONENTS
8-98
 Keep batteries away from fire, sparks or open flames (e.g., welding equipment, 
lighted cigarettes).
 DO NOT SMOKE when charging or han- dling batteries.
 KEEP BATTERIES AND ELECTROLYTE  OUT OF REACH OF CHILDREN.
 Avoid bodily contact with electrolyte as it 
can cause severe burns or permanent eye 
injury.
FIRST AID IN CASE OF BODILY CONTACT:
EXTERNAL
 Skin — Wash with water.
 Eyes — Flush with water for 15 minutes 
and get immediate medical attention.
INTERNAL
 Drink...

ELECTRICAL COMPONENTS
8-99
into the battery quickly and can cause 
battery overheating and battery plate 
damage.
 If it is impossible to regulate the charging  current on the battery charger, be careful 
not to overcharge the battery.
 When charging a battery, be sure to  remove it from the vehicle. (If charging 
has to be done with the battery mounted 
on the vehicle, disconnect the negative 
battery lead from the battery terminal.)
 To reduce the chance of sparks, do not  plug in the battery...

ELECTRICAL COMPONENTS
8-100
NOTE:
If the current is lower than the standard charg-
ing current written on the battery, this type of 
battery charger cannot charge the MF battery. 
A variable voltage charger is recommended.
d. Charge the battery until the battery’s charg-ing voltage is 15 V.
NOTE:
Set the charging time  at 20 hours (maximum).
e. Measure the battery open-circuit voltage  after leaving the battery unused for more 
than 30 minutes.
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6. Install: Battery
7....

ELECTRICAL COMPONENTS
8-101
Relay unit (fuel pump relay)
FZ1-N
FZ1-S
Headlight relay (on/off)
(FZ1-N)Headlight relay (on/off)
(FZ1-S)
Headlight relay (dimmer)
(FZ1-S)
Radiator fan motor relay
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity/No continuity
(between “3” to “4”)
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
ResultContinuity/No continuity
(between “3” to “4”)
1. Positive battery...

ELECTRICAL COMPONENTS
8-102
ET2D1030
CHECKING THE TURN SIGNAL/HAZARD 
RELAY
1. Check: Turn signal/hazard relay input voltageOut of specification  → The wiring circuit 
from the main switch to the turn signal/haz-
ard relay coupler is faulty and must be 
repaired.
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a. Connect the pocket tester (DC 20 V) to the  turn signal/hazard relay terminal as shown. b. Turn the main switch to “ON”.
c. Measure the turn signal/hazard relay input 
voltage.
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ELECTRICAL COMPONENTS
8-103
NOTE:
The pocket tester and the analog pocket tester 
readings are shown in the following table.
FZ1-N
FZ1-S
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a. Disconnect the relay unit coupler from the 
wire harness.
b. Connect the pocket tester ( Ω×1) to the 
relay unit terminal as shown.
c. Check the relay unit (diode) for continuity.
d. Check the relay unit (diode) for no continu- ity.
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EAS28100
CHECKING THE IGNITION COILS
The following procedure applies to...

ELECTRICAL COMPONENTS
8-104
c. Measure the primary coil resistance.
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2. Check: Secondary coil resistanceOut of specification  → Replace.
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a. Disconnect the ignition coil leads from the 
wire harness.
b. Connect the pocket tester ( Ω ×  1k) to the 
ignition coil as shown.
c. Measure the secondary coil resistance.
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3. Check:  Ignition spark gap “a”
Out of specification  → Replace.
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a....

ELECTRICAL COMPONENTS
8-105
a. Connect the pocket tester (Ω ×  100) to the 
crankshaft position sensor coupler as 
shown.
b. Measure the crankshaft position sensor  resistance.
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EAS28130
CHECKING THE LEAN ANGLE SENSOR
1. Remove:
 Lean angle sensor
2. Check:
 Lean angle sensor out put voltageOut of specification  → Replace.
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a. Connect the lean angle sensor coupler to 
the wire harness.
b. Connect the pocket tester (DC 20 V) to the  lean angle...

ELECTRICAL COMPONENTS
8-106
Out of specification → Replace the startor 
coil.
EAS28150
CHECKING THE STATOR COIL
1. Disconnect:  Stator coil coupler
(from the wire harness)
2. Check:  Stator coil resistance
Out of specification  → Replace the startor 
coil.
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a. Connect the pocket tester ( Ω ×  1) to the 
startor coil coupler as shown.
b. Measure the stator coil resistance.
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EAS28170
CHECKING THE RECTIFIER/REGULATOR
1. Check:  Charging...