Yamaha MT-01 Service Manual page 781

Manuals by Motomatrix / www.motomatrix.co.uk
Fault
code Symptom
No.
The ECU is unable to moni-
tor the battery voltage (an
43
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 memory.
(When this malfunction is
50 detected in the ECU, the
fault code number might
not appear on the meter.)
Muffler cooling fan temper-
62 ature sensor: open or short
circuit detected.
Engine trouble warning
light is flashing. (Abnormal-
63 ly high temperature is de-
tected by muffler cooling
fan temperature sensor.)
No signals are received
Er-1
from the ECU.
No signals are received
Er-2 from the ECU within the
specified duration.
Data from the ECU cannot
Er-3
be received correctly.
Non-registered data has
Er-4 been received from the
meter.
Email: info@motomatrix.co.uk
FUEL INJECTION SYSTEM
Probable cause of malfunction
• Open or short circuit in wire harness.
• Malfunction in ECU.
• Malfunction in ECU. (The CO adjustment
value is not properly written on or read from
the internal memory).
Malfunction in the charging system. Refer to
"CHARGING SYSTEM" on page 7-11.
• Malfunction in ECU. (The program and data
are not properly written on or read from the
internal memory.)
• Open or short circuit in wire harness.
• Defective muffler cooling fan temperature
sensor.
• Malfunction in ECU.
• Improperly installed sensor.
• Muffler cover fan fuse or ECU fuse is blown.
• Defective muffler cooling fan temperature
sensor or muffler cooling fan motor relay
• Positions of muffler cooling fan temperature
sensor and its surrounding parts changed
due to deformed parts near sensor
• Muffler cooling fan temperature sensor de-
tected a temperature of 120 °C (248 °F) or
higher.
• Open or short circuit in wire harness.
• Malfunction in meter.
• Malfunction in ECU.
• Defective wire connection of the ECU cou-
pler.
• Improper connection in wire harness.
• Malfunction in meter.
• Malfunction in ECU.
• Improper connection in wire harness.
• Malfunction in meter.
• Malfunction in ECU.
• Improper connection in wire harness.
• Malfunction in meter.
• Malfunction in ECU.
7-35
Diagnostic
code No.
09
60
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12
63
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