Yamaha R1 2004 ServiceManual

7-17
Intake air pressure sensor output
voltage
3.75 
 4.25 V Tester positive probe 
 pink / white 
Tester negative probe 
 black / blue
1
2
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 condition of connector
Inspect the coupler for any pins that
may have pulled out.
Check...

7-18
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 countermeasuerReinstatement
method
1Intake air pressure sensor hose detached,
clogged, kinked, or pinched.
Intake air pressure sensor malfunction at
intermediate electrical potential.Repair or replace the sensor hose.
Inspect and repair the...

7-19
FUEL INJECTION SYSTEMFI
Fault code No.15SymptomThrottle position sensor – open or shrt circuit 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
turning the
main switch
ON....

7-20
FUEL INJECTION SYSTEMFI
EXUP servomotor resistance
(when the pulley is turned once)
5.25 
 9.75 kΩ at 20C (68F) Positive tester terminal 
 blue
Negative tester probe 
 white / red
1
2
Fault code No.17SymptomEXUP servo motor potention circuit – open or short circuit detected.
Used diagnostic code 53
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...

7-21
FUEL INJECTION SYSTEMFI
To prevent damaging the EXUP servomo-
tor, perform this test within a few seconds
of connecting the battery. Positive battery terminal 
 black / green
Negative battery lead 
 black / red
1
2
CAUTION:
Fault code No.18SymptomEXUP servo motor is stuck.
Used diagnostic code 53
OrderInspection operation item and probable
couseOperation item and countermeasureReinstatement
method
1Connected condition of connector
Inspect the coupler for any pins that
may have pulled out.
Check the...

7-22
FUEL INJECTION SYSTEMFI
Fault code No.19SymptomOpen circuit in the input line of ECU No.15 terminal is detected.
Used diagnostic code No. 20 (sidestand switch)
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Connected condition of connector
Main wiring harness ECU coupler
(No.15 pin)
Execute the diagnostic mode (Code No.20).
Check the coupler for any pins that may have
pulled out.
Check the locking condition of the coupler.
If there is a...

7-23
FUEL INJECTION SYSTEMFI
Fault code No.21SymptomOpen or short circuit is detected from the coolant temperature sensor.
Used diagnostic code No. 06 (coolant temperature sensor)
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.
Coolant temperature sensor...

7-24
FUEL INJECTION SYSTEMFI
Intake air temperature sensor
resistance
2.21 
 2.69 kΩ at 20C (68F) Tester positive probe 
 brown / white 
Tester negative probe 
 black / blue
1
2
12

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 temperature sensor.
Used diagnostic code No. 05 (intake...

7-25
FUEL INJECTION SYSTEMFI
Atmospheric pressure sensor
output voltage
3.75 
 4.25 V Tester positive probe 
 pink 
Tester negative probe 
 black / blue
1
2
Fault code No.23SymptomOpen or short circuit detected from the atmospheric pressure sensor.
Used diagnostic code No. 02 (atmospheric pressure sensor)
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...

7-26
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...