7-20
FUEL INJECTION SYSTEM
FI
Speed sensor output voltage
When sensor is on
DC 4.8 V or more
When sensor is off
DC 0.6 V or less
Tester positive probe
!
white
Tester negative probe
!
black / blue
1
2
Fault code No.
42
Symptom
1 No normal signals are received from the speed sensor.
2 Open or short circuit is detected in the neutral switch.
Used diagnostic code No. 07 (speed sensor)
!
A1
X
A4
No. 21 (neutral switch)
!
B1
X
B4
Order
Inspection operation item and probable
cause
Operation item and countermeasure
Reinstatement
method
A1
Connected condition of speed sensor
connector
Inspect the coupler for any pins that
may have pulled out.
Check the locking condition of the cou-
pler.
If there is a malfunction, repair it and connect it
securely.
Speed sensor coupler
Main wiring harness ECU coupler
Reinstated by
starting the
engine, and
inputting the
vehicle speed
signals by
ti
th
A2
Open or short circuit in speed sensor
lead.
Repair or replace if there is an open or short
circuit.
Between sensor coupler and ECU coupler.
blue - blue
white / yellow - white / yellow
black / blue - black / blue
operating the
motorcycle at a
low speed of
20 to 30 km / h.
A3
Gear for detecting vehicle speed has
broken.
Replace if defective.
Refer to “TRANSMISSION” in chapter 5.
A4
Defective speed sensor
Execute the diagnostic mode (code No. 07)
Replace if defective.
1. Measure the speed sensor output voltage.
2. Connect the pocket tester (DC 20 V) to the
speed sensor coupler terminal as shown.
3. Measure the speed sensor output voltage.
4. Is the speed sensor OK?
Order
Inspection operation item and probable
cause
Operation item and countermeasure
Reinstatement
method
B1
Connected condition of connector
Inspect the coupler for any pins that
may have pulled out.
Check the locking condition of the cou-
pler.
If there is a malfunction, repair it and connect it
securely.
Neutral switch connector
Main wiring harness ECU coupler
Reinstated by
starting the
engine, and
inputting the
vehicle speed
i
l b
B2
Open or short circuit in neutral switch
lead.
Repair or replace if there is an open or short
circuit.
Between switch connector and ECU coupler
sky blue - black / yellow
signals by
operating the
motorcycle at a
low speed of
20 to 30 km / h
B3
Faulty shift drum
(neutral detection area)
Replace if defective.
Refer to “TRANSMISSION” in chapter 5.
20 to 30 km / h.
B4
Defective neutral switch
Execute the diagnostic mode (code No. 21)
Replace if defective.
Refer to “CHECKING THE SWITCHES” in
chapter 8.
Summary of Contents for FZ6-ST
Page 1: ...FZ6 ST 5VX 28197 11 SUPPLEMENTARY SERVICE MANUAL LIT 11616 18 43 FZ6 STC ...
Page 34: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...
Page 35: ......
Page 81: ...2 20 TIGHTENING TORQUES SPEC Cylinder head tightening sequence Crankcase tightening sequence ...
Page 86: ...2 25 COOLING SYSTEM DIAGRAMS SPEC 1 Radiator 2 Oil cooler COOLING SYSTEM DIAGRAMS ...
Page 87: ...2 26 COOLING SYSTEM DIAGRAMS SPEC 1 Water pump 2 Oil cooler 3 Radiator ...
Page 88: ...2 27 COOLING SYSTEM DIAGRAMS SPEC 1 Oil cooler 2 Water pump ...
Page 89: ...2 28 COOLING SYSTEM DIAGRAMS SPEC 1 Radiator 2 Thermostat ...
Page 90: ...2 29 ENGINE OIL LUBRICATION CHART SPEC ENGINE OIL LUBRICATION CHART ...
Page 92: ...2 31 LUBRICATION DIAGRAMS SPEC 1 Oil pump 2 Exhaust camshaft 3 Intake camshaft 4 Oil strainer ...
Page 93: ...2 32 LUBRICATION DIAGRAMS SPEC 1 Oil cooler 2 Oil strainer 3 Oil level switch 4 Oil pump ...
Page 94: ...2 33 LUBRICATION DIAGRAMS SPEC 1 Main axle 2 Oil pump 3 Relief valve ...
Page 96: ...2 35 LUBRICATION DIAGRAMS SPEC 1 Main axle 2 Drive axle ...
Page 432: ...8 27 LIGHTING SYSTEM ELEC EAS00780 LIGHTING SYSTEM CIRCUIT DIAGRAM ...
Page 439: ...8 34 SIGNALING SYSTEM ELEC EAS00793 SIGNALING SYSTEM CIRCUIT DIAGRAM ...
Page 465: ...FZ6 SS FZ6 SSC WIRING DIAGRAM ...
Page 469: ......