Yamaha 2009 XP500Y TMAX Service Manual page 334

Fault
code Symptom
No.
Engine speed is high when
37
the engine is idling.
Lean angle sensor: open or
41
short circuit detected.
The ECU (engine control
unit) is unable to monitor
43 the battery voltage (an
open or short circuit in the
line to the ECU).
Error is detected while
reading or writing on EE-
44
PROM (CO adjustment val-
ue).
Power supply to the fuel in-
46 jection system is not nor-
mal.
Faulty ECU (engine control
unit) memory. (When this
malfunction is detected in
50
the ECU, the fault code
number might not appear
on the meter.)
No signals are received
Er-1 from the ECU (engine con-
trol unit).
No signals are received
from the ECU (engine con-
Er-2
trol unit) within the speci-
fied duration.
Data from the ECU (engine
Er-3 control unit) cannot be re-
ceived correctly.
Non-registered data has
Er-4 been received from the
meter.
FUEL INJECTION SYSTEM
Probable cause of malfunction
• Stuck fast idle plunger (in fully open posi-
tion).
• Malfunction in ECU (engine control unit).
• Open or short circuit in wire harness.
• Defective lean angle sensor.
• Malfunction in ECU (engine control unit).
• Open circuit in wire harness.
• Malfunction in ECU (engine control unit).
• Defective fuel injection system relay.
• Malfunction in ECU (engine control unit).
(The CO adjustment value is not properly
written on or read from the internal memo-
ry).
Malfunction in the charging system. Refer to
"CHARGING SYSTEM" on page 8-11.
• Malfunction in ECU (engine control unit).
(The program and data are not properly
written on or read from the internal memo-
ry.)
• Open or short circuit in communication line.
• Malfunction in meter.
• Malfunction in ECU (engine control unit).
• Open or short circuit in communication line.
• Malfunction in meter.
• Malfunction in ECU (engine control unit).
• Open or short circuit in communication line.
• Malfunction in meter.
• Malfunction in ECU (engine control unit).
• Open or short circuit in communication line.
• Malfunction in meter.
• Malfunction in ECU (engine control unit).
8-37
Diagnostic
code No.
01
08
50
60
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