Diagnostic Code: Sensor Operation Table; Fuel System - Yamaha YZF-R25 Service Manual

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
Fault code No.
Er-2
Er-3
Er-4 (fault code display)
Er-4 (Yamaha diagnostic tool)
EAS31120

DIAGNOSTIC CODE: SENSOR OPERATION TABLE

Diagnostic
code No.
01 Throttle position sensor sig-
nal
• Fully closed position
• Fully open position
03 Intake air pressure
05 Air temperature
06 Coolant temperature
07 Speed sensor pulses
08 Lean angle sensor
• Upright
• Overturned
09 Fuel system voltage
(battery voltage)
ECU (engine control unit) internal malfunction (output signal error): no
signals are received from the ECU within the specified duration.
ECU (engine control unit) internal malfunction (output signal error): data
from the ECU cannot be received correctly.
ECU (engine control unit) internal malfunction (input signal error): non-
registered data has been received from the meter.
ECU (engine control unit) internal malfunction (input signal error): no nor-
mal signals are received from the Yamaha diagnostic tool.
Item
14–20
97–107
Displays the intake air pres-
sure.
Displays the air temperature. Compare the actually mea-
When engine is cold: Dis-
plays temperature closer to
air temperature.
When engine is hot: Displays
current coolant temperature.
Speed sensor pulse
0–999
Lean angle sensor output
voltage
0.4–1.4
3.7–4.4
Approximately 12.0
Item
Meter display
9-6
Procedure
Check with throttle valves
fully closed.
Check with throttle valves
fully open.
Set the engine stop switch to
" ", and then operate the
throttle while pushing the
start switch " ". (If the dis-
play value changes, the per-
formance is OK.)
sured air temperature with
the meter display value.
Compare the actually mea-
sured coolant temperature
with the meter display value.
Check that the number in-
creases when the rear wheel
is rotated. The number is cu-
mulative and does not reset
each time the wheel is
stopped.
Remove the lean angle sen-
sor and incline it more than
45 degrees.
Set the engine stop switch to
" ", and then compare the
actually measured battery
voltage with the meter dis-
play value. (If the actually
measured battery voltage is
low, recharge the battery.)