Yamaha WR250R Service Manual page 304

Fault code
Item
No.
Error in writing the
44 amount of CO adjust-
ment on EEPROM
Vehicle system power
46 supply
(Monitor voltage)
ECU internal malfunc-
50 tion
(memory check error)
70 Left idle control
— Start unable warning
Communication error with the multifunction meter
Fault code
Item
No.
ECU internal malfunc-
Er-1 tion
(output signal error)
ECU internal malfunc-
Er-2 tion
(output signal error)
ECU internal malfunc-
Er-3 tion
(output signal error)
ECU internal malfunc-
Er-4 tion
(input signal error)
* If multiple malfunctions have been detected for the ECU, you may not be able to start or drive the vehicle.
FUEL INJECTION SYSTEM
Symptom
Error is detected while reading or writ-
ing on EEPROM (code re-registering
key code and throttle valve fully
closed notification value).
Power supply to the ECU system relay
is not normal.
Faulty ECU memory. (When this mal-
function is detected in the ECU, the
fault code number might not appear
on the meter.)
After 20 minutes left idling, the ECU
automatically stops the engine.
Engine trouble warning light flashes
when the start switch is turned ON.
Relay is not turned ON even if the
crank signal is input while the start
switch is turned ON.
When the start switch is turned ON
while an error is detected with the
fault code of No.12, 19, 30, 41 or 50.
Symptom
No signals are received from the
ECU.
No signals are received from the ECU
within the specified duration.
Data from the ECU cannot be
received correctly.
Non-registered data has been
received from the meter.
8-33
Able / Able /
unable to unable to
start drive
Able Able
Able Able
Unable Unable
Able Able
Unable Unable
Able / Able /
unable to unable to
start drive
Able* Able*
Able* Able*
Able* Able*
Able* Able*