Electronic Fuel Injection System Troubleshooting - Yamaha YZF-R7 Owner's Service Manual

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ELECTRONIC FUEL INJECTION SYSTEM
1 Main switch
5 Battery
6 Main fuse
C Camshaft sensor
D Throttle position sensor
E Intake air pressure sensor
F Atmospheric pressure sensor
G Intake air temperature sensor
H Coolant temperature sensor
I Pickup coil
J ECU
K Cylinder #1-injector 1
L Cylinder #2-injector 1
M Cylinder #3-injector 1
N Cylinder #4-injector 1
O Cylinder #1-injector 2
P Cylinder #2-injector 2
Q Cylinder #3-injector 2
R Cylinder #4-injector 2
X Fall detection switch
Y Speed sensor
y Fuel pump
z Main relay
} Engine stop switch
å Electronic fuel injection system fuse
£ ECU fuse
TROUBLESHOOTING
The condition code is displayed by the tachometer.
Check the condition code list to
identify the faulty part. Refer to
"ELECTRICAL CONTROL SYS-
TEM".
In diagnosis mode, select the
appropriate diagnosis code to
check the operation of the faulty
part.
NOTE:
• Before troubleshooting, remove the following part(-s):
1) bottom cowling
2) front cowling
• Troubleshoot with the following special tool(-s).
Co, diagnosis switch box
90890-03171
Test coupler adapter
90890-03149
Out of specifi-
cation
Check the
wiring.
8 - 29
–
ELEC
No good
Replace.
+