Yamaha MT-03, Service Manual

Page: 313 / 400

7-26
FUEL INJECTION SYSTEM
44
An error is detected while reading or
writing on EEPROM. • Malfunction in ECU (The CO adjustment value is not
properly written on or read from the internal memory.)
D60
46
Power supply to the fuel injection sys-
tem relay is not normal. • Open circuit in wire harness
• Malfunction in rectifier/regulator
• Malfunction in A.C. magneto rotor
Refer to “CHARGING SYSTEM”
D09
50
Faulty ECU memory. When this mal-
function is detected, the code number
might not appear on the meter. • Malfunction in ECU (The program and data are not prop-
erly written on or read from the internal memory.) —
Fault
code No.
Symptom Probable cause of malfunction Diagnostic code
on page 8-11.
EAS00907
Diagnostic mode table
Switch the meter display from the regular mode to the diagnostic mode. To switch the display, refer
to “DIAGNOSTIC MODE”.
NOTE:
_
• Check the intake air temperature and coolant temperature as close as possible to the intake air
temperature sensor and the coolant temperature sensor respectively.
• If it is not possible to check the intake air temperature, use the ambient temperature as reference.
Diagnostic
code
Item Action
D01
Throttle angle Displays the throttle angle.
• Check with throttle fully closed.
• Check with throttle fully open. 0 ~ 125 degrees
• Fully closed (15 ~ 17 degrees)
• Fully open (97 ~ 100 degrees)
D03
Intake air pressure Displays the intake air pressure.
Set the engine stop switch to “
”.
• Generate the pressure difference by cranking the
engine with the start switch, but do not start the
engine.
When the engine is stopped:
Atmospheric pressure 101.3 kPa
(760 mmHg, 30 inHg)
When cranking the engine with start
switch:
1.3 ~ 26.6 kPa
(10 ~ 200 mmHg, 0.4 ~ 7.9 inHg)
D05
Intake air temperature Displays the intake air temperature.
• Check the temperature in the air filter case. Compare the temperature in the air
filter case to the value displayed on
the diagnostic tool.
D06
Coolant temperature Displays the coolant temperature.
• Check the coolant temperature. Compare the coolant temperature to
the value displayed on the
D07
Vehicle speed pulse Displays the accumulation of the vehicle speed
pulses that are generated when the tire is spun. (0 ~ 199; resets to 0 after 199)
OK if the numbers appear on the
diagnostic tool.
Data displayed on the
FI diagnostic tool (reference value)
diagnostic tool.