Fuel Injection System Fi - Yamaha XF50W Service Manual

Fault code table
Fault
Symptom
codeNo.
No normal signals are received from
the crankshaft position sensor.
12
Intake air pressure sensor-open or
short circuit detected.
13
14 Faulty intake air pressure sensor
pipe system
Throttle position sensor-open or
short circuit detected.
15
16 A stuck throttle position sensor is
detected.
Open circuit in the input line (blue/
19
yellow lead) of ECU is detected
when the start switch is pressed.
Coolant temperature sensor-open
21
or short circuit detected.
Intake air temperature sensor-open
or short circuit detected.
22
30 The vehicle has overturned.
Open circuit is detected in the pri-
33
mary lead of the ignition coil.
The ISC (idle speed control) valve
37 is stuck fully open.
Fuel injector open or short circuit is
39
detected.
Lean angle cut-off switch-open or
41
short circuit detected.
42 No normal signals are received from
the speed sensor.
Power supply to the fuel injector, fuel
43
pump and ignition coil are not nor-
mal.
An error is detected while reading
44
or writing on E2PROM.
46 Power supply to Fl system is not
normal.(red lead)
Faulty ECU memory. When this
50
malfunction is detected, the code
number might not appear on the
meter.
61 ISC (idle speed control) valve open
or short circuit is detected.
FUEL INJECTION SYSTEM
Probable cause of malfunction
• Open or short circuit in wiring harness.
• Defective crankshaft position sensor.
• Malfunction in pickup rotor.
• Improperly installed sensor lead connector in the
coupler.
• Open or short circuit in wiring sub lead.
• Open orshort circuit in wiring harness.
• Defective intake air pressure sensor.
• Improperly installed sendor lead connector in the
coupler.
• Intake air pressure sensor is disconnected or
clogged.
• Open or short circuit in wiring sub lead.
• Open or short circuit in wiring harness.
• Defective throttle position sensor.
• Improperly installed throttle'position sensor lead con-
nector in the coupler.
• Stuck throttle position sensor.
• Defective throttle position sensor.
• Open circuit in wiring harness (ECU coupler).
• Open or short circuit in wiring harness.
• Defective coolant temperature sensor.
• Improperly installead sensor lead connector in the
coupler.
• Open or short circuit in wire sub lead.
• Open or short circuit in wiring harness.
• Defective intake temperature sensor.
• Improperly installed sensor lead connector in the
coupler.
• Overturned condition.
• Open circuit in wiring harness.
• Malfunction in ignition coil.
• Improperly installed primary lead connector in the
coupler.
• Malfunction in throttle body.
• Malfunction in throttle cables.
• ISC (idle speed control) valve is stuck fully open.
• Open or short circuit in wiring harness.
• Defective fuel injector.
• Improperly installed lead connector in the coupler.
• Open or short circuit in wiring harness.
• Defective lean angle cut-off switch.
• Improperly installed lead connector in the coupler.
• Open or short circuit in wiring harness.
• Defective speed sensor.
• Improperly installead lead connector in the coupler.
• Open or short circuit in wiring harness.
• Malfunction in ECU. (The CO adjustment value, code
reregistering key code, and throttle valve fully closed
notification value are not properly written on or read
from the internal memory.)
• Malfunction in charging system.
• Malfunction in ECU. (The program and data are not
properly written on or read from the internal memory.)
• Open or short circuit in wiring harness.
• Improperly installed lead connector in the coupler.
7-10
FI
Diagnostic code
_
D03
D03
D01
D01
D20
D06
D06
D08
D30
D54
D36
D08
D07
D09
D60
_
_
D54