Yamaha Fz6 N Service Manual

FUEL INJECTION SYSTEM
8-38
8. Verify the operation of the sensor or actuator. Sensor operation
The data representing the oper ating conditions of the sensor appears on the trip LCD.
 Actuator operation Set the engine stop switch to “ ” to operate the actuator.
NOTE:
If the engine stop switch is set to “ ”, set it to “ ”, and then set it to “ ” again.
9. Turn the main switch to “OFF” to cancel the diagnostic mode.
Diagnostic code table
A. FZ6-N/FZ6-NA/FZ6-S/FZ6-SA
B. FZ6-NHG(W)/FZ6-NAHG/FZ6-SHG(W)/...

FUEL INJECTION SYSTEM
8-39
14Intake air pressure sensor-
pipe system malfunction 
(clogged or detached 
hose).
 Detected hose
 Clogged hose  Intake air pressure sensor hose is 
detached, clogged, kinked, or pinched.
 Malfunction in ECU. 03
15 Throttle position sensor-
open or short circuit 
detected.  Open or short circuit in wire sub lead.
 Open or short circuit in wire harness.
 Defective throttle position sensor.
 Malfunction in ECU.
 Improperly installed throttle position sensor.
01
16...

FUEL INJECTION SYSTEM
8-40
Sensor operation table42
No normal signals are 
received from the speed 
sensor.
Open or short circuit is 
detected in the neutral 
switch.  Open or short circuit in wire harness.
 Defective speed sensor.
 Malfunction in vehicle speed sensor 
detected unit.
 Defective neutral switch.
 Malfunction in the engine side of the neutral  switch.
 Malfunction in ECU. 07
21
43 The ECU is unable to moni-
tor the battery voltage
(an open circuit in the line to 
the ECU).  Open...

FUEL INJECTION SYSTEM
8-41
03Pressure difference
(intake air pressure)
Displays the intake air pres-
sure. Turn On the engine stop 
switch, then operate the 
throttle while pressing the 
start switch. (If the display 
value changes, the perfor-
mance is OK.)
05 Intake air temperature Displays the intake air tem-
perature. Compare the actually mea-
sured intake air tempera-
ture with the meter display 
value. (*)
06 Coolant temperature Displays the coolant tempera-
ture. Compare the actually mea-
sured...

FUEL INJECTION SYSTEM
8-42
* If it is not possible to check the intake temperature, use the ambient temperature as reference (use 
the compared values for reference).
Actuator operation table 61
Malfunction history code 
display
—
 No history 00
 History exists 12-50 (Fault detection code)
 (If code numbers more than one are detected, the dis-
play alternates every two 
seconds to show all the 
detected code numbers. 
When all code numbers are 
shown, the display repeats 
the same process.)
62...

FUEL INJECTION SYSTEM
8-43
EAS27451
TROUBLESHOOTING DETAILS
This section describes the measures per fault code number displayed on the meter. Check and ser-
vice the items or components that are the probab le cause of the malfunction following the order 
given.
After the check and service of the malfunctioning part has been completed, reset the meter display 
according to the reinstatement method.
Fault code No.:
Code number displayed on the meter when the engine failed to work normally. Refer to...

FUEL INJECTION SYSTEM
8-44
Diagnostic code number to be used when the diagnostic mode is operated. Refer to DIAGNOSTIC 
MODE on page 8-37.
Fault code No. 12 Symptom No normal signals are received from the crankshaft posi-
tion sensor.
Diagnostic code No.
Order Item/components and probable 
cause Check or maintenance job
Reinstate-
ment method
1 Installed condition of crankshaft posi-
tion sensor Check the installed area for 
looseness or pinching.Cranking the 
engine.
2 Connected state of connector
...

FUEL INJECTION SYSTEM
8-45
Fault code No. 14 SymptomA. Intake air pressure sensor-pipe system malfunction 
(clogged or detached hose).
B. Intake air pressure sensor-open or short circuit 
detected.
C. Stuck throttle position sensor detected.
Diagnostic code No. 03 Intake air pressure sensor
Order Item/components and probable 
cause Check or maintenance job Reinstate-
ment method
1 Intake air pressure sensor hose  Check the intake air pressure 
sensor hose condition.
 Repair or replace the sensor...

FUEL INJECTION SYSTEM
8-46
Fault code No. 15 Symptom Throttle position sensor-open or short circuit detected.
Diagnostic code No. 01 Throttle position sensor
Order Item/components and probable 
cause Check or maintenance job
Reinstate-
ment method
1 Installed condition of throttle position 
sensor. Check the installed area for 
looseness or pinching.Turning the 
main switch 
ON.
2 Connected state of connector
 Throttle position sensor coupler
 Main wire harness ECU coupler
 Check the coupler for any...

FUEL INJECTION SYSTEM
8-47
Fault code No. 19 SymptomOpen circuit is detected in the input line from the side-
stand switch to the ECU.
Diagnostic code No. 20 Sidestand switch
Order Item/components and probable 
cause Check or maintenance job Reinstate-
ment method
1 Connected state of connector
 Main wire harness ECU coupler (No. 
13 and 30 pin, black)
 Alarm coupler  Check the coupler for any pins 
that may have pulled out.
 Check the locking condition of  the coupler.
 If there is a malfunction,...