Diagnostic/Error Code Identification Chart (Yum1A/Yum2A) - Yamaha UMAX Service Manual

DIAGNOSTIC/ERROR CODE IDENTIFICATION CHART (YUM1A/

DIAGNOSTIC/ERROR CODE IDENTIFICATION CHART (YUM1A/YUM2A)

Diagnostic Error
code code
— 12
D03 13
14
D05 22
D11 28
D30 —
— 39
— 44
— 46
— 50
— 89
D61 —
Description
Crankshaft position
sensor
Intake air pressure
sensor
Intake air
temperature sensor
Engine temperature
sensor
Ignition system
Fuel injector
EPROM write error
Vehicle power supply
ECU internal failure
Engine overheating
Error history
Symptom
No signal from the Crankshaft position sensor
crankshaft position open or short circuit
sensor Pickup rotor
Wire harness
ECU
Incorrectly installed sensor
Abnormal intake air Intake air pressure sensor
pressure values open or short circuit
ECU
Wire harness
Incorrectly installed sensor
Clogged intake air flow or
trouble of the intake valve
system.
No signal from Intake air temperature
temperature sensor sensor open or short circuit
ECU
Wire harness
Incorrectly installed sensor
Abnormal engine Engine temperature sensor
temperature values open or short circuit
ECU
Wire harness
Incorrectly installed sensor
No ignition or spark Ignition coil open or short
circuit
ECU
Wire harness
Incorrectly installed ignition
coil
No fuel injection Fuel injector open or short
circuit
ECU
Wire harness
Incorrectly installed fuel
injector
Failure to write ECU
EPROM
Voltage to fuel Low battery charge
injector is abnormal Wire harness
Charging system
Faulty ECU ECU
memory
High engine Engine cooling fins plugged
temperatures Cooling fan
Engine ducting
No Error = "00" —
History of error
code is displayed in
the order of lower
number.
9-4
YUM2A)
Possible cause
Engine
starts
No
No
No
Yes
Yes
—
No
Yes
Yes
No
Yes
—