Yamaha YFM70RY Service Manual page 325

Fault
code Symptom
No.
Power supply to the fuel in-
43 jector and fuel pump is not
normal.
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
detected in the ECU, the
50
fault code number might
not appear on the multi-
function meter.)
Sensor operation table
Diag-
nostic
code
No.
d01 Throttle angle
• Fully closed position
• Fully opened position
d03 Pressure difference
(atmospheric pressure and
intake air pressure)
d05 Intake air temperature
d06 Coolant temperature
d07 Vehicle speed pulse
• 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 charging system. Refer to
"CHARGING SYSTEM" on page 8-11.
• Malfunction in ECU. (The program and data
are not properly written on or read from the
internal memory.)
Item
15–20
95–100
Displays the intake air pres-
sure.
Displays the intake air tem-
perature.
Displays the coolant temper-
ature.
0–999
FUEL INJECTION SYSTEM
Probable cause of malfunction
Meter display
8-36
Diagnostic
code No.
d09
d60
—
—
Checking method
Check with throttle fully
closed.
Check with throttle fully
open.
Set the engine stop switch
to "RUN", then operate the
throttle while pushing the
start switch. (If the display
value changes, the perfor-
mance is OK.)
Compare the actually mea-
sured intake air tempera-
ture with the meter display
value.
Compare the actually mea-
sured coolant temperature
with the meter display val-
ue.
Check that the number in-
creases when the rear
wheels are rotated.
The number is cumulative
and does not reset each
time the wheel is stopped.