Yamaha YXR70FX, Руководство по обслуживанию

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FI
FUEL INJECTION SYSTEM
Fault code No. 43 Symptom Power supply to the injector and fuel pump is not normal.
Diagnostic code No. d09 Fuel system voltage
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• Fuel injection system relay
• Main wire harness-ECU coupler • Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
Starting the
engine and
operating it at
idle.
2 Open or short circuit in the wire
harness. • Repair or replace if there is an
open or short circuit.
• Between fuel injection system
relay coupler and ECU coupler.
(red/blue–red/blue)
• Between fuel injection system
relay coupler and starter relay
coupler.
(brown/black–brown/black)
3 Malfunction or open circuit in fuel
pump relay. • Execute the diagnostic mode.
(Code No.d09)
• Replace if defective.
• If there is no malfunction in the
fuel injection system relay,
replace the ECU.
Fault code No. 44 Symptom Error is detected while reading or writing on EEPROM
(CO adjustment value).
Diagnostic code No. d60 EEPROM improper cylinder indication
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Malfunction in ECU. • Execute the diagnostic mode.
(Code No.d60)
• Replace ECU if defective.
Turning the
main switch to
“ON”.