Download Yamaha XT660X Service manual

FUEL INJECTION SYSTEM
Fault code No.
Er-1
Symptom
FI
No signals are received from the ECU.
Used diagnostic code No. – –
Order
1
Item/components
Check or maintenance job
Restore method
Coupler connections
ECU coupler
Meter couplers
Check the couplers for any pins that may have
pulled out.
Check that the couplers are securely locked.
Reinstated automatically when it receives
a normal signal.
If there is a malfunction, repair it and connect it
securely.
2
Malfunction in meter assembly
Replace the meter assembly.
3
Malfunction in ECU
Replace the ECU.
Fault code No.
Er-2
Symptom
Reinstated automatically when it receives
a normal signal.
No signals are received from the ECU within the specified duration.
Used diagnostic code No. – –
Order
1
Item/components
Check or maintenance job
Restore method
Coupler connections
ECU coupler
Meter couplers
Check the couplers for any pins that may have
pulled out.
Check that the couplers are securely locked.
Reinstated automatically when it receives
a normal signal.
If there is a malfunction, repair it and connect it
securely.
2
Malfunction in meter assembly
Replace the meter assembly.
3
Malfunction in ECU
Replace the ECU.
Fault code No.
Er-3
Symptom
Data from the ECU cannot be received correctly.
Used diagnostic code No. – –
Order
1
Item/components
Check or maintenance job
Restore method
Coupler connections
ECU coupler
Meter couplers
Check the couplers for any pins that may have
pulled out.
Check that the couplers are securely locked.
Reinstated automatically when it receives
a normal signal.
If there is a malfunction, repair it and connect it
securely.
2
Malfunction in meter assembly
Replace the meter assembly.
3
Malfunction in ECU
Replace the ECU.
Fault code No.
Er-4
Symptom
Non-registered data has been received from the meter.
Used diagnostic code No. – –
Order
1
Item/components
Check or maintenance job
Restore method
Coupler connections
ECU coupler
Meter couplers
Check the couplers for any pins that may have
pulled out.
Check that the couplers are securely locked.
Reinstated automatically when it receives
a normal signal.
If there is a malfunction, repair it and connect it
securely.
2
Malfunction in meter assembly
Replace the meter assembly.
3
Malfunction in ECU
Replace the ECU.
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