Yamaha Fz6n Manual

7-18
FUEL INJECTION SYSTEMFI
Tester positive prove 
 blue 
Tester negative prove 
 yellow / green1
2
Fault code No.30SymptomThe motorcycle has overturned.
Used diagnostic code No. 08 (lean angle cut-off switch)
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1The motorcycle has overturned.Raise the motorcycle upright.Reinstated by
2Installed condition of the lean angle cut-
off switchCheck the installed area for looseness or
pinching.turning the
main...

7-19
FUEL INJECTION SYSTEMFI
Fault code No.33SymptomMalfunction detected in the primary lead of the ignition coil (#1, #4).
Used diagnostic code No. 30 (ignition coil #1, #4)
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Connected condition of connector
Inspect the coupler for any pins
that may have pulled out.
Check the locking condition of
the coupler.If there is a malfunction, repair it and connect it
securely.
Ignition coil primary side...

7-20
FUEL INJECTION SYSTEMFI
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.42Symptom1 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 
 A4
No. 21 (neutral switch) 
 B1 
 B4
OrderInspection operation item and probable
causeOperation item and...

7-21
FUEL INJECTION SYSTEMFI
Battery positive terminal 
  red / black 
Battery positive terminal 
 blue / yellow1
2
Tester positive probe 
 red 
Tester negative probe 
 red / blue
3
4 When the leads are disconnected, the voltage
check by the code No. 09 is impossible.
NOTE:
Fault code No.43SymptomThe ECU is unable to monitor the battery voltage.
Used diagnostic code No. 09 (fuel system voltage)
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method...

7-22
FUEL INJECTION SYSTEMFI
Fault code No.44SymptomError is detected while reading or writing on EEP-ROM
(CO adjustment value).
Used diagnostic No. 60 (EEP-ROM improper cylinder indication)
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Malfunction in ECUExecute diagnostic code 60
1. Check the faulty cylinder. (If there are multiple
cylinders, the number of the faulty cylinders ap-
pear alternately at 2-second intervals.)
2. Readjust the CO of the...

7-23
FUEL INJECTION SYSTEMFI
Fault code No.Er-1SymptomNo signals are received from the ECU.
Used diagnostic code No. – –
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Connected condition of connector
Inspect the coupler for any pins that
may have pulled out.
Check the locking condition of the
coupler.If there is a malfunction, repair it and connect it
securely.
Main wiring harness ECU coupler
Sub-wire harness couplerReinstated by
turning the
main...

7-24
FUEL INJECTION SYSTEMFI
Fault code No.Er-4SymptomNon-registered data has been received from the meter.
Used diagnostic code No. – –
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Connected condition of connector
Inspect the coupler for any pins that
may have pulled out.
Check the locking condition of the
coupler.If there is a malfunction, repair it and connect it
securely.
Main wiring harness ECU coupler
Sub-wire harness couplerReinstated by...

7-25
Order Job / Part Q’ty Remarks
1
2
3
4
5
6
7
8Removing the throttle bodies
Seat
Front cowling inner panel (left and right)
Fuel tank
Battery
Air filter case
Battery box and battery box bracket
Sub-wire harness coupler
Coolant temperature sensor coupler
Balance hose (for CAL)
Throttle body joint clamp screw
Throttle bodies
Throttle cable
Throttle body joint
Heat protector2
1
1
4
1
2
4
1Remove the parts in the order listed.
Refer to “SEAT” in chapter 3.
Refer to “COWLINGS” in chapter 3.
Refer to “FUEL...

7-26
Order Job / Part Q’ty Remarks
9 Plunger control unit hose 1 Disconnect
For installation, reverse the removal
procedure.
THROTTLE BODIESFI 

7-27
THROTTLE BODIESFI
Order Job / Part Q’ty Remarks
1
2
3
4
5
6
7
8
9
10
11
12
13
14Removing the injectors
Throttle position sensor coupler
Intake air pressure sensor coupler
Cylinder #1-injector coupler
Cylinder #2-injector coupler
Cylinder #3-injector coupler
Cylinder #4-injector coupler
Sub wire harness
Negative pressure hose
Intake air pressure sensor
Fuel distributor
Injector
Throttle position sensor
Fuel pulsation damper
Throttle body assembly1
1
1
1
1
1
1
1
1
1
4
1
1
1Remove the parts in the...