Yamaha R1 2004 ServiceManual

7-27
FUEL INJECTION SYSTEMFIFUEL INJECTION SYSTEMFI
Fault code No.33SymptomMalfunction detected in the primary lead of the ignition coil (#1).
Used diagnostic code No. 30 (ignition coil #1)
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...

7-28
FUEL INJECTION SYSTEMFI
Fault code No.36SymptomMalfunction detected in the primary lead of the ignition coil (#4).
Used diagnostic code No. 33 (ignition coil #4)
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Connected state 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 coupler – Gray /...

7-29
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...

7-30
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
1Connected...

7-31
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
appear alternately at 2-second intervals.)
2. Readjust the CO of the...

7-32
FUEL INJECTION SYSTEMFI
Fault code No.47SymptomSub-throttle position sensor – open or short circuit detected.
Used diagnostic code 56
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Installed condition of sub-throttle position
sensor.Check the installed area for looseness or pinch-
ing.
Check that it is installed in the specified position.
Refer to “THROTTLE BODIES” section.Reinstated by
turning the
main switch
ON.
2Connected condition of...

7-33
FUEL INJECTION SYSTEMFI
To prevent damaging the sub-throttle ser-
vomotor, perform this test within a few se-
conds of connecting the battery. Positive battery terminal 
 yellow / red 
Negative battery terminal 
 yellow / white  
1
2
CAUTION:
Fault code No.48SymptomSub-throttle servo motor is stuck.
Used diagnostic code 56
OrderInspection operation item and probable
couseOperation item and countermeasureReinstatement
method
1Connected condition of connector
Inspect the coupler for any pins that
may...

7-34
FUEL INJECTION SYSTEMFI
Fault code No.Er-1SymptomNo signal are received from the ECU.
Er-2SymptomNo signal are received from the ECU within the specified duration.
Er-3SymptomData from the ECU cannot be received correctly.
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...

7-35
Order Job / Part Q’ty Remarks
1
2
3
4
5
6
7
8Removing the throttle bodies
Seat
Fuel tank
Air filter case
Sub-wire harness coupler
Coolant temperature sensor coupler
Thermo wax inlet hose
Thermo wax outlet hose
Idle adjust screw wire
Throttle body joint clamp
Throttle bodies
Throttle cables2
1
1
1
1
4
1
2Remove the parts in the order listed.
Refer to “SEAT” in chapter 3.
Refer to “FUEL TANK” in chapter 3.
Refer to “AIR FILTER CASE” in chapter 3.
Disconnect.
Disconnect.
Loosen.
If it loosens too much,...

7-36
Order Job / Part Q’ty Remarks
9
10
11Throttle body joint
Heat protector
Fuel hose4
1
1To install the throttle body joint, make
sure to install it to the cylinder with the
same figures corresponding to the fig-
ures stated on the throttle body joint.
For installation, reverse the removal
procedure.
NOTE:
THROTTLE BODIESFI