Yamaha FZ6-ST Supplementary Service Manual page 380

Fault
Symptom
code No.
Faulty ECU memory. When this
malfunction is detected, the code
50
number might not appear on the
meter.
No signals are received from the ECU.
Er-1
No signals are received from the ECU
Er-2 within the specified duration.
Data from the ECU cannot be
Er-3 received correctly.
Non-registered data has been
received from the meter.
Er-4
FUEL INJECTION SYSTEM
Probable cause of malfunction
S Malfunction in ECU. (The program and data are not
properly written on or read from the internal memory.)
S Open or short circuit in wiring sub lead.
S Malfunction in meter.
S Malfunction in ECU.
S Improper connection in wiring sub lead.
S Malfunction in meter.
S Malfunction in ECU.
S Improper connection in wiring sub lead.
S Malfunction in meter.
S Malfunction in ECU.
S Improper connection in wiring sub lead.
S Malfunction in meter.
S Malfunction in ECU.
7-10
FI
Diagnostic
code
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