Yamaha Fz6 N Service Manual

ELECTRICAL COMPONENTS
8-118
Headlight relay
Radiator fan motor
EAS4S81030
CHECKING THE ABS MOTOR RELAY
1. Check: ABS motor relay for continuity Connect the pocket tester ( Ω ×  1) to the ter-
minals of ABS motor relay.
Check for continuity between terminals “1” 
and “2” of the ABS motor relay. Tester reading is “
∞”.  →  Replace the ABS 
motor relay.
CAUTION:
ECA4S81021
Do not reverse the connections. If the 
pocket tester leads are connected in 
reverse to terminals “1” and “2”, a correct 
pocket...

ELECTRICAL COMPONENTS
8-119
EAS4S81031
CHECKING THE SOLENOID VALVES AND 
MOTOR
CAUTION:
ECA4S81023
When check the hydraulic unit solenoid 
relay and ABS motor, do not remove the 
brake hoses.
1. Check: Solenoid valve resistance (front)
Out of specification  → Replace the hydrau-
lic unit.
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a. Connect the pocket tester ( Ω ×  1) to the 
solenoid valve (front) terminal as shown.
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2. Check:  Solenoid valve resistance (rear)
Out of specification...

ELECTRICAL COMPONENTS
8-120
EAS4S81032
CHECKING THE TURN SIGNAL/HAZARD 
RELAY
1. Check: Turn signal/hazard relay input voltage Out 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....

ELECTRICAL COMPONENTS
8-121
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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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EAS28070
CHECKING THE SPARK PLUG CAPS
The following procedure applies to all of the 
spark plug caps.
1. Check: Spark plug cap resistance Out of specification  → Replace....

ELECTRICAL COMPONENTS
8-122
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a. Disconnect the ignition coil connectors 
from the ignition coil terminals.
b. Connect the pocket tester ( Ω ×  1) to the 
ignition coil as shown.
c. Measure the primary coil resistance.
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2. Check:  Secondary coil resistance Out of specification  → Replace.
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a. Disconnect the spark  plug cap from the 
ignition coil.
b. Connect the pocket tester ( Ω ×  1k) to the 
ignition coil as...

ELECTRICAL COMPONENTS
8-123
2. Check: Crankshaft position sensor resistance
Out of specification  → Replace the crank-
shaft position sensor.
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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
(from the bracket.)
2. Check:  Lean angle sensor output voltage
Out of...

ELECTRICAL COMPONENTS
8-124
b. Turn the main switch to “ON”.
c. Elevate the front wheel and slowly rotate it.
d. Measure the voltage with each full rotation of the front wheel, the voltage reading 
should cycle from Lo (0.5–0.9 V) to Hi (1.1–
1.7 V) to Lo to Hi.
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EAS4S81035
CHECKING THE STARTOR MOTOR OPERA-
TION
1. Check: Starter motor operation
Does not operate  → Perform the electric 
starting system troubleshooting, starting 
with step 5.
Refer to TROUBLESHOOTING on...

ELECTRICAL COMPONENTS
8-125
Out of specification → Replace the rectifier/
regulator.
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a. Set the engine tachometer to the ignition 
coil of cylinder #1.
b. Connect the pocket tester (AC 20 V) to the 
rectifier/regulator coupler as shown.
c. Start the engine and let it run at approxi- mately 5000 r/min.
d. Measure the rectifier/regulator input volt-
age.
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EAS28180
CHECKING THE HORN
1. Check: Horn resistance Out of specification  → Replace....

ELECTRICAL COMPONENTS
8-126
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a. Connect the pocket tester (Ω ×  100) to the 
engine oil level gauge terminal as shown.
b. Measure the pickup coil resistance.
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EAS28230
CHECKING THE FUEL SENDER
1. Remove:  Fuel tank
2. Disconnect:
 Fuel pump coupler
 Fuel sender coupler (from the wire harness)
3. Remove:  Fuel pump (from the fuel tank)
4. Check:
 Fuel sender resistance Out of specification  → Replace the fuel 
pump assembly....

ELECTRICAL COMPONENTS
8-127
b. Set the main switch to “ON”.
c. Elevate the rear wheel and slowly rotate it.
d. Measure the voltage (DC 5 V) of White/Yel-low and Black/Blue. With each full rotation 
of the rear wheel, the voltage reading 
should cycle from 0.6 V to 4.8 V to 0.6 V to 
4.8 V.
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EAS28250
CHECKING THE RADIATOR FAN MOTOR
1. Check: Radiator fan motor
Faulty/rough movement  → Replace.
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a. Disconnect the radiator fan motor coupler 
from...