2004 YAMAHA YZF-R1SC wiring

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.
ProCarManuals.com

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 malfunction, repair it and connected it
securely.If the
transmission is
in gear, it is
reinstated by
retracting the
sidestand.
If the
2Open or short circuit in wiring harness
and / or sub lead.Repair or replace if there is an open or short
circuit.
Between sidestand switch coupler and ECU
coupler
Blue / Black – Blacktransmission is
in neutral, it is
reinstated by
reconnecting
the wiring.
3The malfunction of the sidestand switch.Replace if defective.
Refer to “CHECKING THE SWITCHES” in
chapter 8.
Fault code No.20SymptomDefective values are detected due to the internal malfunction of the intake air
pressure sensor or the atmospheric pressure sensor.
Used diagnostic code No. 02 (atmospheric pressure sensor)
1
03 (intake air pressure sensor)
2
OrderInspection operation item and probable
causeOperation item and countermeasureReinstatement
method
1Defective atmospheric pressure sensorExecute the diagnostic mode (Code No.02).
Replace if defective.
Refer to “Fault code No.23”.Reinstated by
turning the
main switch
2Defective intake air pressure sensorExecute the diagnostic mode (Code No.03).
Replace if defective.
Refer to “Fault code No.13”.ON.
ProCarManuals.com

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 coupler
Main wiring harness ECU coupler
Sub-wire harness couplerReinstated by
turning the
main switch
ON.
2Open 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
Green / White – Green / White
3Defective coolant temperature sensor.Execute the diagnostic mode (Code No.06).
Replace if defective.
Refer to “COOLING SYSTEM” in chapter 8.
ProCarManuals.com

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 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.
Intake temperature sensor coupler
Main wiring harness ECU coupler
Sub-wire harness couplerReinstated by
turning the
main switch
ON.
2Open 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
Brown / White – Brown / White
3Defective intake temperature sensor.Execute the diagnostic mode (Code No.05).
Replace if defective.
1. Remove the intake air temperature sensor
from the air filter case.
2. Connect the pocket tester (Ω  100) to the
intake air temperature sensor terminal as
shown.
3. Measure the intake air temperature sensor
resistance.
4. Is the intake air temperature sensor OK?
ProCarManuals.com

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 the locking condition of the
coupler.If there is a malfunction, repair it and connect it
securely.
Atmospheric pressure sensor coupler
Main wiring harness ECU couplerReinstated by
turning the
main switch
ON.
2Open or short circuit in wiring harness.Repair or replace if there is an open or short
circuit.
Between sensor coupler and ECU coupler
Blue – Blue
Black / Blue – Black / Blue
Pink – Pink
3Defective atmospheric pressure sensor.Execute the diagnostic mode (Code No.02).
Replace if defective.
1. Connect the pocket tester (DC 20 V) to the
atmospheric pressure sensor coupler terminal
as shown.
2. Set the main switch to “ON”.
3. Measure the atmospheric pressure sensor out-
put voltage.
4. Is the atmospheric pressure sensor OK?
ProCarManuals.com

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).
ProCarManuals.com

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 primary side coupler – Orange
Main wiring harness ECU couplerReinstated by
starting the en-
gine and oper-
ating it at idle.
2Open or short circuit in lead.Repair or replace if there is an open or short
circuit.
Between ignition coil coupler (#1) and ECU
coupler / main harness
Orange – Orange
Red / Black – Red / Black
3Detective ignition coil (test the primary
and secondary coils for continuity).Execute the diagnostic mode (Code No.30).
Replace if defective.
Refer to “IGNITION SYSTEM” in chapter 8.
Fault code No.34SymptomMalfunction detected in the primary lead of the ignition coil (#2).
Used diagnostic code No. 31 (ignition coil #2)
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 coupler – Gray / Red
Main wiring harness ECU couplerReinstated by
starting the en-
gine and oper-
ating it at idle.
2Open or short circuit in lead wire.Repair or replace if there is an open or short
circuit.
Between ignition coil coupler (#2) and ECU
coupler / main harness
Gray / Red – Gray / Red
Red / Black – Red / Black
3Defective ignition coil (test the primary
and secondary coils for continuity).Execute the diagnostic mode (Code No.31).
Replace if defective.
Refer to “IGNITION SYSTEM” in chapter 8.
Fault code No.35SymptomMalfunction detected in the primary lead of the ignition coil (#3).
Used diagnostic code No. 32 (ignition coil #3)
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 coupler – Orange /
Green
Main wiring harness ECU couplerReinstated by
starting the en-
gine and oper-
ating it at idle.
2Open or short circuit in lead wire.Repair or replace if there is an open or short
circuit.
Between ignition coil coupler (#3) and ECU
coupler / main harness
Orange / Green – Orange / Green
Red / Black – Red / Black
3Defective ignition coil (test the primary
and secondary coils for continuity).Execute the diagnostic mode (Code No.32).
Replace if defective.
Refer to “IGNITION SYSTEM” in chapter 8.
ProCarManuals.com

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 / Green
Main wiring harness ECU couplerReinstated by
starting the en-
gine and oper-
ating it at idle.
2Open or short circuit in lead wire.Repair or replace if there is an open or short
circuit.
Between ignition coil coupler (#4) and ECU
coupler / main harness
Gray / Green – Gray / Green
Red / Black – Red / Black
3Defective ignition coil (test the primary
and secondary coils for continuity).Execute the diagnostic mode (Code No.33).
Replace if defective.
Refer to “IGNITION SYSTEM” in chapter 8.
Fault code No.41SymptomOpen or short circuit detected in the lean angle cut-off switch.
Used diagnostic code No. 08 (lean angle cut-off switch)
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.
Lean angle cut-off switch coupler
Main wiring harness ECU couplerReinstated by
turning the
main switch
ON.
2Open or short circuit in wiring harness.Repair or replace if there is an open or short
circuit.
Between switch coupler and ECU coupler
Black / Blue – Black / Blue
Yellow / Green – Yellow / Green
Blue – Blue
3Defective lean angle cut-off switchExecute the diagnostic mode (Code No.08).
Replace if defective.
Refer to Fault code No. 30.
ProCarManuals.com