Yamaha Fz6n Manual

7-8
FUEL INJECTION SYSTEMFI
NOTE: 7. Verify the operation of the sensor or actuator.

Sensor operation
The data representing the operating condi-
tions of the sensor appears on the trip LCD.

Actuator operation
Set the engine stop switch to “ON” to operate
the actuator.
* If the engine stop switch is set to “ON”, set it
to “OFF”, and then set it to “ON” again.
8. Turn the main switch to “OFF” to cancel the
the diagnostic mode.
To perform a reliable diagnosis, make sure to
turn “OFF” the power supply...

7-9
FUEL INJECTION SYSTEMFI
Fault code table
Fault
code No.SymptomProbable cause of malfunctionDiagnostic
code
12
No normal signals are received from
the crankshaft position sensor.
Open or short circuit in wiring harness.

Defective crankshaft position sensor.

Malfunction in pickup rotor.

Malfunction in ECU.

Improperly installed sensor.
—
13
Intake air pressure sensor-open or
short circuit detected.
Open or short circuit in wiring sub lead.

Open or short circuit in wiring harness.

Defective intake...

7-10
FUEL INJECTION SYSTEMFI
Fault
code No.SymptomProbable cause of malfunctionDiagnostic
code
50
Faulty ECU memory. When this
malfunction is detected, the code
number might not appear on the
meter.
Malfunction in ECU. (The program and data are not
properly written on or read from the internal memory.)
—
Er-1No signals are received from the ECU.
Open or short circuit in wiring sub lead.

Malfunction in meter.

Malfunction in ECU.—
Er-2No signals are received from the ECU
within the specified...

7-11
FUEL INJECTION SYSTEMFI
NOTE:
EAS00907
Diagnostic mode table
Switch the meter display from the regular mode to the diagnostic mode. To switch the display, refer to
“DIAGNOSTIC MODE”.

Check the intake air temperature and coolant temperature as close as possible to the intake air tem-
perature sensor and the coolant temperature sensor respectively.

If it is not possible to check the intake air temperature, use the ambient temperature as reference.
Diagnostic
codeItemDescription of actionData...

7-12
FUEL INJECTION SYSTEMFI
Diagnostic
codeItemDescription of actionData displayed on meter
(reference value)
48
AI system solenoidAfter 1 second has elapsed from the time the engine stop
switch has been turned from OFF to ON, it actuates the AI
system solenoid five times every second and illuminates the
engine trouble warning light.
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check the operating sound of
the AI system solenoid 5 times
with the engine stop
switch ON....

7-13
FUEL INJECTION SYSTEMFI
Crankshaft position sensor
resistance
248 
 372 Ω at 20C (68F)
(between gray and black) Tester positive probe 
 gray 
Tester negative probe 
 black
1
2
When installing or removing the con-
nector, main switch turn to “OFF”.
NOTE:
EAS00908
TROUBLESHOOTING DETAILS
This section describes the countermeasures per fault code number displayed on the meter. Check and
service the items or components that are the probable cause of the malfunction following the order.
After the check...

7-14
Intake air pressure sensor output
voltage
3.75 
  4.25 V Tester positive probe 
 pink / white 
Tester negative probe 
 black / blue
1
2
12
When installing or removing the con-
nector, main switch turn to “OFF”.
NOTE:
FUEL INJECTION SYSTEMFI
Fault code No.13SymptomIntake air pressure sensor - open or short circuit detected.
Used diagnostic code No. 03 (intake air pressure sensor)
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Connected...

7-15
FUEL INJECTION SYSTEMFI
Fault code No.14SymptomIntake air pressure sensor - hose system malfunction (clogged or detached
hose).
Used diagnostic code No. 03 (intake air pressure sensor)
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Intake air pressure sensor hose de-
tached, clogged, kinked, or pinched.
Intake air pressure sensor malfunction
at intermediate electrical potential.Repair or replace the sensor hose.
Inspect and repair the...

7-16
FUEL INJECTION SYSTEMFI
Fault code No.16SymptomStuck throttle position sensor detected.
Used diagnostic code No. 01 (throttle position sensor)
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Installed condition of throttle position
sensor.Check the installed area for looseness or pinching.
Check that it is installed in the specified position.
Refer to “THROTTLE BODIES” section.Reinstated by
starting the
engine,
ti it2Defective throttle position...

7-17
FUEL INJECTION SYSTEMFI
Intake air temperature sensor
resistance
2.2 
 2.7 kΩ at 20C (68F) Tester positive probe 
 brown / white 
Tester negative probe 
 black / blue
1
2

Handle the intake air temperature sensor
with special care.

Never subject the intake air temperature sen-
sor to strong shocks. If the intake air temper-
ature sensor is dropped, replace it.
WARNING
Fault code No.22SymptomOpen or short circuit detected from the intake air temperature sensor.
Used diagnostic code No. 05 (intake...