Yamaha 2007 R6 Service

							FUEL INJECTION SYSTEM
8-48
EAS27460
TROUBLESHOOTING DETAILS
This section describes the measures per fault code number displayed on the meter. Check and service 
the items or components that are the probable cause of the malfunction following the order given.
After the check and service of the malfunctioning part has been completed, reset the meter display ac-
cording to the reinstatement method.
Fault code No.:
Code number displayed on the meter when the engine failed to work normally. Refer to “Self-Diagnostic 
Function table”.
Diagnostic code No.:
Diagnostic code number to be used when the diagnostic mode is operated. Refer to “DIAGNOSTIC 
MODE” on page 8-40. 48Air induction system sole-
noidActuates the air induction 
system solenoid five times at 
one-second intervals.
Illuminates the engine trou-
ble warning light.Check the operating sound 
of the air induction system 
solenoid five times.
50 Fuel injection system relayActuates the fuel injection 
system relay five times at 
one-second intervals.
Illuminates the engine trou-
ble warning light.
(The engine trouble warning 
light is OFF when the relay is 
ON, and the engine trouble 
warning light is ON when the 
relay is OFF).Check the operating sound 
of the fuel injection system 
relay five times.
51 Radiator fan motor relayActuates the radiator fan mo-
tor relay five times at one-
second intervals. (ON 2 sec-
onds, OFF 3 seconds)
Illuminates the engine trou-
ble warning light.Check the operating sound 
of the radiator fan motor re-
lay five times.
52 Headlight relayActuates the headlight relay 
five times at one-second in-
tervals. (ON 2 seconds, OFF 
3 seconds)
Illuminates the engine trou-
ble warning light.Check the operating sound 
of the headlight relay five 
times.
53 EXUP servo motorActuates the servo motor 
(turns to open side and to 
closed side).
Illuminates the engine trou-
ble warning light.Check the operating sound. Diag-
nostic 
code 
No.Item Actuation Checking method 
						

							FUEL INJECTION SYSTEM
8-49
Fault code No. 11 Symptom No normal signals are received from the cylinder identifi-
cation sensor when the engine is started or while the ve-
hicle is being driven.
Diagnostic code No.——
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Installed condition of cylinder identifi-
cation sensor.Check for looseness or pinching. Cranking the 
engine.
2 Connections
•Cylinder identification sensor cou-
pler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.
3 Open or short circuit in wire harness.•Repair or replace if there is an 
open or short circuit.
•Between the cylinder identifica-
tion sensor coupler and ECU 
coupler.
(blue–blue)
(white/black–white/black)
(black/blue–black/blue)
4 Defective cylinder identification sen-
sor.•Replace if defective.
Refer to “CHECKING THE 
CYLINDER IDENTIFICATION 
SENSOR” on page 8-100. 
						

							FUEL INJECTION SYSTEM
8-50
Fault code No. 12 Symptom No normal signals are received from the crankshaft posi-
tion sensor.
Diagnostic code No.——
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Installed condition of crankshaft posi-
tion sensor.Check for looseness or pinching. Cranking the 
engine.
2 Connections
•Crankshaft position sensor coupler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.
3 Open or short circuit in wire harness.•Repair or replace if there is an 
open or short circuit.
•Between the crankshaft position 
sensor coupler and ECU cou-
pler.
(gray–gray)
(black/blue–black/blue)
4 Defective crankshaft position sensor.•Replace if defective.
Refer to “CHECKING THE 
CRANKSHAFT POSITION 
SENSOR” on page 8-93. 
						

							FUEL INJECTION SYSTEM
8-51
Fault code No. 13 Symptom Intake air pressure sensor: open or short circuit detected.
Diagnostic code No. 03 Intake air pressure sensor
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Connections
•Intake air pressure sensor coupler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.Reinstated au-
tomatically if a 
normal signal is 
received.
2 Open or short circuit in wire harness 
and/or sub-wire-harness 2.•Repair or replace if there is an 
open or short circuit.
•Between intake air pressure 
sensor coupler and ECU cou-
pler.
(black/blue–black/blue)
(pink/white–pink/white)
(blue–blue)
3 Defective intake air pressure sensor.•Execute the diagnostic mode. 
(Code No. 03)
•Replace if defective.
Refer to “CHECKING THE IN-
TAKE AIR PRESSURE SEN-
SOR” on page 8-100.
Fault code No. 14 Symptom Intake air pressure sensor: hose system malfunction 
(clogged or detached hose).
Diagnostic code No. 03 Intake air pressure sensor
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Intake air pressure sensor hose•Check the intake air pressure 
sensor hose condition.
•Repair or replace the sensor 
hose.Cranking the 
engine.
2 Defective intake air pressure sensor.•Execute the diagnostic mode. 
(Code No. 03)
•Replace if defective.
Refer to “CHECKING THE IN-
TAKE AIR PRESSURE SEN-
SOR” on page 8-100. 
						

							FUEL INJECTION SYSTEM
8-52
Fault code No. 15 Symptom Throttle position sensor (for throttle valves): open or 
short circuit detected.
Diagnostic code No. 01
13Throttle position sensor (for throttle valves) signal 1
Throttle position sensor (for throttle valves) signal 2
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Installed condition of throttle position 
sensor (for throttle valves).•Check for looseness or pinch-
ing.
•Check that the sensor is in-
stalled in the specified position.Turning the 
main switch to 
“ON”.
2 Connections
•Throttle position sensor (for throttle 
valves) coupler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.
3 Open or short circuit in wire harness.•Repair or replace if there is an 
open or short circuit.
•Between throttle position sen-
sor (for throttle valves) coupler 
and ECU coupler.
(black/blue–black/blue)
(blue–blue)
(blue–blue)
(green–green)
4 Defective throttle position sensor (for 
throttle valves).•Execute the diagnostic mode. 
(Code Nos. 01, 13)
•Replace if defective.
Refer to “CHECKING THE 
THROTTLE POSITION SEN-
SOR (FOR THROTTLE 
VALVES)” on page 8-97. 
						

							FUEL INJECTION SYSTEM
8-53
Fault code No. 17 Symptom EXUP servo motor circuit: open or short circuit detected.
Diagnostic code No. 53 EXUP servo motor
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Connections
•EXUP servo motor coupler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.Reinstated au-
tomatically if a 
normal signal is 
received.
2 Open or short circuit in wire harness.•Repair or replace if there is an 
open or short circuit.
•Between EXUP servo motor 
coupler and ECU coupler.
(blue–blue)
(white/red–white/red)
(black/blue–black/blue)
3 Defective EXUP servo motor (potenti-
ometer circuit).•Execute the diagnostic mode. 
(Code No. 53)
•Replace if defective.
Fault code No. 18 Symptom EXUP servo motor is stuck.
Diagnostic code No. 53 EXUP servo motor
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Connections
•EXUP servo motor coupler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.Turning the 
main switch to 
“ON”.
It takes 3 sec-
onds at the 
maximum be-
fore the origi-
nal state 
returns. 2 Open or short circuit in wire harness.•Repair or replace if there is an 
open or short circuit.
•Between EXUP servo motor 
coupler and ECU coupler.
(black/green–black/green)
(black/red–black/red)
3 Defective EXUP servo motor.•Execute the diagnostic mode. 
(Code No. 53)
•Replace if defective.
4 Defective EXUP valve, pulley, and ca-
bles.Replace if defective. 
						

							FUEL INJECTION SYSTEM
8-54
Fault code No. 19 Symptom Open circuit is detected in the input lead from the side-
stand switch to the ECU.
Diagnostic code No. 20 Sidestand switch
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Connections
•Main wire harness ECU coupler•Execute the diagnostic mode. 
(Code No. 20)
•Check the coupler for any pins 
that may be pulled out.
•Check the locking condition of 
the coupler.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.If the transmis-
sion is in gear, 
retracting the 
sidestand.
If the transmis-
sion is in neu-
tral, 
reconnecting 
the wiring.
2 Open or short circuit in wire harness.•Repair or replace if there is an 
open or short circuit.
•Between ECU coupler and 
main switch coupler.
(blue/black–blue/black)
•Between main switch coupler 
and relay unit coupler.
(blue/yellow–blue/yellow)
•Between relay unit coupler and 
sidestand switch coupler.
(blue/black–blue/black)
•Between sidestand switch cou-
pler and engine ground.
(black–black)
3 Defective sidestand switch.•Replace if defective.
Refer to “CHECKING THE 
SWITCHES” on page 8-81.
Fault code No. 20 Symptom When the main switch is turned to “ON”, the atmospheric 
pressure sensor voltage and intake air pressure sensor 
voltage differ greatly.
Diagnostic code No. 03
02Intake air pressure sensor
Atmospheric pressure sensor
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Defective intake air pressure sensor 
or atmospheric pressure sensor.•Execute the diagnostic mode. 
(Code Nos. 03, 02)
•Replace if defective.
Refer to “CHECKING THE IN-
TAKE AIR PRESSURE SEN-
SOR” on page 8-100 or 
“CHECKING THE ATMO-
SPHERIC PRESSURE SEN-
SOR” on page 8-99.Turning the 
main switch to 
“ON”. 
						

							FUEL INJECTION SYSTEM
8-55
Fault code No. 21 Symptom Coolant temperature sensor: open or short circuit detect-
ed.
Diagnostic code No. 06 Coolant temperature sensor
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Connections
•Coolant temperature sensor coupler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.Reinstated au-
tomatically if a 
normal signal is 
received.
2 Open or short circuit in wire harness.•Repair or replace if there is an 
open or short circuit.
•Between coolant temperature 
sensor coupler and ECU cou-
pler.
(green/white–green/white)
(black/blue–black/blue)
3 Defective coolant temperature sensor.•Execute the diagnostic mode. 
(Code No. 06)
•Replace if defective.
Refer to “CHECKING THE 
COOLANT TEMPERATURE 
SENSOR” on page 8-97.
Fault code No. 22 Symptom Air temperature sensor: open or short circuit detected.
Diagnostic code No. 05 Air temperature sensor
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Connections
•Air temperature sensor coupler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.Reinstated au-
tomatically if a 
normal signal is 
received.
2 Open or short circuit in wire harness.•Repair or replace if there is an 
open or short circuit.
•Between air temperature sen-
sor coupler and ECU coupler.
(brown/white–brown/white)
(black/blue–black/blue)
3 Defective air temperature sensor.•Execute the diagnostic mode. 
(Code No. 05)
•Replace if defective.
Refer to “CHECKING THE AIR 
TEMPERATURE SENSOR” on 
page 8-100. 
						

							FUEL INJECTION SYSTEM
8-56
Fault code No. 23 Symptom Atmospheric pressure sensor: open or short circuit de-
tected.
Diagnostic code No. 02 Atmospheric pressure sensor
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Connections
•Atmospheric pressure sensor cou-
pler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.Reinstated au-
tomatically if a 
normal signal is 
received.
2 Open or short circuit in wire harness 
and/or sub-wire-harness 2.•Repair or replace if there is an 
open or short circuit.
•Between atmospheric pressure 
sensor coupler and ECU cou-
pler.
(black/blue–black/blue)
(pink–pink)
(blue–blue)
3 Defective atmospheric pressure sen-
sor.•Execute the diagnostic mode. 
(Code No. 02)
•Replace if defective.
Refer to “CHECKING THE AT-
MOSPHERIC PRESSURE 
SENSOR” on page 8-99. 
						

							FUEL INJECTION SYSTEM
8-57
Fault code No. 24 Symptom No normal signal is received from the O2 sensor.
Diagnostic code No.——
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 Installed state of O
2 sensor. Check for looseness or pinching. Execute the di-
agnostic mode 
(Code No. 63).
(Set the engine 
stop switch to 
“”.) 2 Connections
•O
2 sensor coupler
•Main wire harness ECU coupler•Check the couplers for any pins 
that may be pulled out.
•Check the locking condition of 
the couplers.
•If there is a malfunction, repair it 
and connect the coupler se-
curely.
3 Open or short circuit in wire harness.•Repair or replace if there is an 
open or short circuit.
•Between O
2 sensor coupler and 
ECU coupler.
(gray/green–gray/green)
(black/blue–black/blue)
(pink/black–pink/black)
(red/blue–red/blue)
4 Check fuel pressure.•Refer to “THROTTLE BODIES” 
on page 7-8.
5 Defective O
2 sensor.•Replace if defective.
Fault code No. 30 Symptom Latch up detected.
No normal signal is received from the lean angle sensor.
Diagnostic code No. 08 Lean angle sensor
Order Item/components and probable 
causeCheck or maintenance job Reinstatement 
method
1 The vehicle has overturned. Raise the vehicle upright. Turning the 
main switch to 
“ON” (however, 
the engine can-
not be restarted 
unless the main 
switch is first 
turned to 
“OFF”). 2 Installed state of the lean angle sen-
sor.Check the installed direction and 
condition of the sensor.
3 Defective lean angle sensor.•Execute the diagnostic mode. 
(Code No. 08)
•Replace if defective.
Refer to “CHECKING THE 
LEAN ANGLE SENSOR” on 
page 8-93.