engine YAMAHA YZF-R1S 2004 Service Manual

7-12
FUEL INJECTION SYSTEMFI
NOTE: Diagnostic mode table
Switch the meter display from the regular mode to the diagnosis 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 it with an atmospheric pressure gauge, judge it by using 101.3 kPa as the
standard.

If it is not possible to check the intake air temperature, use the ambient temperature as reference.
Diagnostic
codeItemDescription of actionData displayed on meter
(reference value)
01
Throttle angleDisplays the throttle angle.

Check with throttle fully closed.

Check with throttle fully open.0
125 degrees

Fully closed position (15
18)

Fully open position (95
100)
02
Atmospheric
pressureDisplays the atmospheric pressure.
* Use an atmospheric pressure gauge to check the
atmospheric pressure.Compare it to the value
displayed on the meter.
03
Intake air pressureDisplays the intake air pressure.
Engine stop switch is on.
* Generate the pressure difference by cranking the engine
with the starter, without actually starting the engine.
Not cranking-atmospheric
pressure

Cranking-intake air pressure It
changes at the value whitch is
smaller than in the atomo-
spheric pressure.
05Intake temperatureDisplays the intake air temperature.
* Check the temperature in the air cleaner case.Compare it to the value
displayed on the meter.
06Coolant temperatureDisplays the coolant temperature.
* Check the temperature of the coolant.Compare it to the value
displayed on the meter.
07
Vehicle speed pulseDisplays the accumulation of the vehicle pulses that are
generated when the tire is spun.(0
999; resets to 0 after 999)
OK if the numbers appear on
the meter.
08Lean angle cut-off
switchDisplays the lean angle cut-off switch values.Upright: 0.4
1.4 V
Overturned: 3.7
4.4 V
09Fuel system voltage
(battery voltage)Displays the fuel system voltage (battery voltage).
Engine stop switch is on.0
18.7 V
Normally, approximately 12.0 V
20Sidestand switchDisplays that the switch is ON or OFF. (When the gear is in a
position other than neutral.)Stand retracted: ON
Stand extended: OFF
21Neutral switchDisplays that the switch is ON or OFF.Neutral: ON
In gear: OFF
30
Ignition coil #1After the engine stop switch has been turned from OFF to
ON, it actuates ignition coil #1 for five times every second
and illuminates the engine trouble warning light.
* Connect an ignition checker.
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check that spark is generated,
5 times with the engine stop
switch ON.
31
Ignition coils #2After the engine stop switch has been turned from OFF to
ON, it actuates ignition coil #2 for five times every second
and illuminates the engine trouble warning light.
* Connect an ignition checker.
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check that spark is generated,
5 times with the engine stop
switch ON.
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7-13
FUEL INJECTION SYSTEMFI
Diagnostic
codeItemDescription of actionData displayed on meter
(reference value)
32
Ignition coil #3After the engine stop switch has been turned from OFF to
ON, it actuates ignition coil #3 for five times every second
and illuminates the engine trouble warning light.
* Connect an ignition checker.
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check that spark is generated,
5 times with the engine stop
switch ON.
33
Ignition coil #4After the engine stop switch has been turned from OFF to
ON, it actuates ignition coil #4 for five times every second
and illuminates the engine trouble warning light.
* Connect an ignition checker.
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check that spark is generated,
5 times with the engine stop
switch ON.
36
Injector #1After the engine stop switch has been turned from OFF to
ON, it actuates the injector #1 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 injector five times with
engine stop switch ON.
37
Injector #2After the engine stop switch has been turned from OFF to
ON, it actuates the injector #2 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 injector five times with
engine stop switch ON.
38
Injector #3After the engine stop switch has been turned from OFF to
ON, it actuates the injector #3 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 injector five times with
engine stop switch ON.
39
Injector #4After the engine stop switch has been turned from OFF to
ON, it actuates the injector #4 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 injector five times with
engine stop switch ON.
48
AI system solenoidAfter 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.
50
Fuel injection system
relayAfter the engine stop switch has been turned from OFF to
ON, it actuates the fuel injection system relay five times
every second and illuminates the engine trouble warning
light (the light is OFF when the relay is ON, and the light is
ON when the relay is OFF).
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check the fuel injection system
relay operating sound 5 times
with the engine stop
switch ON.
51
Radiator fan motor
relayAfter the engine stop switch has been turned from OFF to
ON, it actuates the radiator fan motor relay five times every
5 seconds and illuminates the engine trouble warning light.
(ON 2 seconds, OFF 3 seconds)
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check the radiator fan motor
relay operating sound 5 times
with the engine stop
switch ON.
(At that time, the fan motor
rotates.)
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7-14
FUEL INJECTION SYSTEMFI
Diagnostic
codeItemDescription of actionData displayed on meter
(reference value)
52
Headlight relay 1After the engine stop switch has been turned from OFF to
ON, it actuates the headlight relay five times every
5 seconds and illuminates the engine trouble warning light.
(ON 2 seconds, OFF 3 seconds)
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Check the headlight relay
operating sound 5 times with the
engine stop switch ON.
(At that time, the headlight turns
ON.)
53
EXUP servo motorAfter the engine stop switch has been turned from OFF to
ON, it actuates the servo motor turns to open side and to
close side.
* If the engine stop switch is ON, turn it OFF once, and then
turn it back ON.Turn on the engine trouble
warning light while servo motor
is operated. (Operating angle is
displayed on the LCD meter)
56
Sub-throttle servo
motorAfter the engine stop switch has been turned from OFF to
ON, it actuates the servo motor turns to open side and to
close side.
* If the engine stop switch is ON, turn it OFF once, and then
turn it back on.Turn on the engine trouble warn-
ing light while servo motor is op-
erated (Operating angle is dis-
played on the LCD meter).
60
EEPROM fault code
display
Transmits the abnormal portion of the data in the E2PROM
that has been detected as a self-diagnostic fault code 44.

If multiple malfunctions have been detected, different
codes are displayed at 2-second intervals, and this
process is repeated.(01
04) Displays the cylinder
number.
(00) Displays when there is no
malfunction.
61
Malfunction history
code display
Displays the codes of the history of the self-diagnosis
malfunctions (i.e., a code of a malfunction that occurred
once and which has been corrected).

If multiple malfunctions have been detected, different
codes are displayed at 2-second intervals, and this
process is repeated.11
50
(00) Displays when there is no
malfunction.
62
Malfunction history
code erasure
Displays the total number of codes that are being detected
through self diagnosis and the fault codes in the past
history.

Erases only the history codes when the engine stop switch
is turned from OFF to ON. If the engine stop switch is ON,
turn it OFF once, and then turn it back ON.00
25
(00) Displays when there is no
malfunction.
70Control number
Displays the program control number.00
255
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7-15
FUEL INJECTION SYSTEMFI
Cylinder identification sensor
output voltage
When sensor is on
4.8 V or more
When sensor is off
0.8 V or less Tester positive probe
white / black
Tester negative probe
black / blue
1
2
TROUBLESHOOTING DETAILS
This section describes the measures per fault code number displayed on the meter. Carry out check
and maintenance on items or components that could be a cause of malfunction in accordance with the
order.
When the check and maintenance of malfunctioned part is completed, restore the meter display ac-
cording to the “Restore method”.
Fault code No.:
Fault code number displayed on the meter when the engine failed to work normally. (Refer to “Diag-
nostic fault code table”.)
Diagnostic code No.:
Code number to be used when the diagnostic monitoring mode is operated. (Refer to “DIAGNOS-
TIC MODE”.)
Fault code No.11SymptomNo normal signals are received from the cylinder identification sensor.
Used diagnostic code No. – –
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Installed condition of sensorCheck the installed area for looseness or
pinching.Reinstated by
starting the
2Connected 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.
Cylinder identification sensor coupler
Main wiring harness ECU coupler
Sub-wire harness couplerengine and
operating it at
idle.
3Open or short circuit in wiring harness
and / or sub lead.Repair or replace if there is an open or short circuit.
Between sensor coupler and ECU coupler
Blue – Blue
White / Black – White / Black
Black / Blue – Black / Blue
4Defective cylinder identification sensor.Replace if defective.
1. Connect the pocket tester (DC 20 V) to the
cylinder identification sensor coupler terminal
as shown.
2. Set the main switch to “ON”.
3. Measure the cylinder identification sensor out-
put voltage.
4. Is the cylinder identification sensor OK?
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7-16
Crankshaft position sensor
resistance
336
504 Ω at 20C (68F)
(between gray and black) Tester positive probe
gray
Tester negative probe
black
1
2
12
FUEL INJECTION SYSTEMFI
Fault code No.12SymptomNo normal signals are received from the crankshaft position sensor.
Used diagnostic code No. – –
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Installed condition of sensorCheck the installed area for looseness or
pinching.Reinstated by
cranking the
2Connected 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.
Crankshaft position sensor coupler
Main wiring harness ECU couplerengine.
3Open or short circuit in wiring harness.Repair or replace if there is an open or short
circuit between the main wiring harnesses.
Between sensor coupler and ECU coupler
Gray – Gray
Black / Blue – Black / Blue
4Defective crankshaft position sensor.Replace if defective.
1. Disconnect the crankshaft position sensor cou-
pler from the wire harness.
2. Connect the pocket tester (Ω  100) to the
crankshaft position sensor coupler as shown.
3. Measure the crankshaft position sensor resis-
tance.
4. Is the crankshaft position sensor OK?
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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 connection.Reinstated by
starting the
engine and
operating it at
2Connected condition of connector
Intake air pressure sensor coupler
Main wiring harness ECU couplerCheck the coupler for any pins that may have
pulled out.
Check the looking condition of the coupler.
If there is a malfunction, repair it and connect it
securely.idle.
3Defective intake air pressure sensor.Execute the diagnostic mode (Code No.03).
Replace if defective.
Refer to “Fault code No. 13”.
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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.
2Connected 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.
Throttle position sensor coupler
Main wiring harness ECU coupler
Sub-wire harness coupler
3Open or short circuit in wiring harness
and / or sub lead.Repair or replace if there is an open or short
circuit.
Between sensor coupler and ECU coupler
Black / Blue – Black / Blue
Yellow – Yellow
Blue – Blue
4Throttle position sensor lead wire open
circuit output voltage check.Check for open circuit and replace the throttle
position sensor.
Black / Blue – Yellow
Open circuit item Output voltage
Ground wire open 5 V
circuit
Output wire open 0V
circuit
Power supply wire 0V
open circuit
5Defective throttle position sensor.Execute the diagnostic mode (Code No.01).
Replace if defective.
Refer to “THROTTLE BODIES” section.
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
1When detecting fault code No.15.Refer to “Fault code No.15”.Reinstated by
2Installed 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.starting the
engine,
operating it at
idle and then3Defective throttle position sensorExecute the diagnostic mode (Code No.01).
Replace if defective.
Refer to “THROTTLE BODIES” section.idle, and then
racing it.
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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 switch
ON3Connected 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.
Lean angle cut-off switch coupler
Main wiring harness ECU couplerON
(however, the
engine cannot
be restarted
unless the
main switch is
4Defective lean angle cut-off switchExecute the diagnostic mode (Code No.08).
Replace if defective.
1. Remove the lean angle cut-off switch from the
motorcycle.
2. Connect the lean angle cut-off switch coupler
to the wireharness.
3. Connect the pocket tester (DC 20 V) to the
emergency stop switch coupler as shown.
4. When turn the lean angle cut-off switch
approx. 65, the voltage reading is 0.4 V to 4.4
V.
5. Is the emergency stop switch OK?
main switch is
first turned
OFF).
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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 countermeasureReinstatement
method
A1Connected condition of speed sensor
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.
Speed sensor coupler
Main wiring harness ECU couplerReinstated by
starting the
engine, and
inputting the
vehicle speed
signals by
ti thA2Open or short circuit in speed sensor
lead.Repair or replace if there is an open or short circuit.
Between sensor coupler and ECU coupler.
Blue – Blue
White / Yellow – White / Yellow
Black / Blue – Black / Blueoperating the
motorcycle at a
low speed of
20 to 30 km / h.
A3Defective speed sensorExecute the diagnostic mode (Code No.07).
Replace if defective.
1. Measure the speed sensor output voltage.
2. Connect the pocket tester (DC 20 V) to the
speed sensor coupler terminal as shown.
3. Measure the speed sensor output voltage.
4. Is the speed sensor OK?
A4Gear for detecting vehicle speed has
broken.Replace if defective.
Refer to “TRANSMISSION” in chapter 5.
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method.
B1Connected 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.
Neutral switch connector
Main wiring harness ECU couplerReinstated by
starting the
engine, and
inputting the
vehicle speed
ilbB2Open or short circuit in neutral switch
lead.Repair or replace if there is an open or short circuit.
Between switch connector and ECU coupler
Sky blue – Black / Yellowsignals by
operating the
motorcycle at a
low speed ofB3Defective neutral switchExecute the diagnostic mode (Code No.21).
Replace if defective.
Refer to “CHECKING THE SWITCHES” in
chapter 8.low s eed of20 to 30 km / h.
B4Faulty shift drum
(neutral detection area)Replace if defective.
Refer to “TRANSMISSION” in chapter 5.
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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 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.
Starting circuit cut-off relay coupler
(fuel injection system relay)
ECU couplerReinstated by
starting the
engine and
operating it at
idle.
2Malfunction in ECUFuel injection system relay is on.
3Open or short circuit in the wiring harness.Repair or replace if there is an open or short
circuit.
Between battery terminal and ECU coupler
Red / white – Red / white
Red – Blue / Yellow (Main switch and engine
stop switch are on.)
Red – Red / Blue (Fuel injection system
relay is on.)
4Malfunction or open circuit in fuel injection
system relayExecute the diagnostic mode (Code No.09).
Replace if defective.
1. Disconnect the starting circuit cut-off relay
from the wire harness.
2. Connect the pocket tester (Ω  1) and battery
(12 V) to the starting circuit cut-off relay termi-
nals as shown.
3. Does the starting circuit cut-off relay have con-
tinuity between blue / white and black?
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