Yamaha YFM70RY Service Manual page 324

Diagnostic code table
Fault
code Symptom
No.
No normal signals are re-
12 ceived from the crankshaft
position sensor.
Intake air pressure sensor:
13 open or short circuit detect-
ed.
Intake air pressure sensor:
hose line malfunction
14
(clogged or detached
hose).
Throttle position sensor:
15 open or short circuit detect-
ed.
Stuck throttle position sen-
16
sor detected.
Coolant temperature sen-
21 sor: open or short circuit
detected.
Intake air temperature sen-
22 sor: open or short circuit
detected.
The vehicle has over-
30
turned.
Malfunction detected in the
33 primary lead of the ignition
coil.
Lean angle sensor: open or
41
short circuit detected.
No normal signals are re-
42 ceived from the speed sen-
sor.
FUEL INJECTION SYSTEM
Probable cause of malfunction
• Open or short circuit in wire harness.
• Defective crankshaft position sensor.
• Malfunction in crankshaft position sensor
rotor.
• Malfunction in ECU.
• Improperly installed sensor.
• Open or short circuit in wire harness.
• Defective intake air pressure sensor.
• Malfunction in ECU.
• Intake air pressure sensor hose is de-
tached, clogged, kinked, or pinched.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Defective throttle position sensor.
• Malfunction in ECU.
• Improperly installed throttle position sensor.
• Stuck throttle position sensor.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Defective coolant temperature sensor.
• Malfunction in ECU.
• Improperly installed coolant temperature
sensor.
• Open or short circuit in wire harness.
• Defective intake temperature sensor.
• Malfunction in ECU.
• Improperly installed intake air temperature
sensor.
• The vehicle has overturned.
• Malfunction in ECU.
• Open or short circuit in wire harness.
• Malfunction in ignition coil.
• Malfunction in ECU.
• Malfunction in a component of ignition cut-
off circuit system.
• Open or short circuit in wire harness.
• Defective lean angle sensor.
• Malfunction in ECU.
• Open circuit in wiring harness.
• Defective speed sensor.
• Malfunction in vehicle speed sensor detect-
ed.
• Malfunction in the engine side of the neutral
switch.
• Malfunction in ECU.
8-35
Diagnostic
code No.
—
d03
d03
d01
d01
d06
d05
d08
d30
d08
d07
d21