Yamaha FZ6-ST Supplementary Service Manual - page 380

7-10

FUEL INJECTION SYSTEM

FI

Fault

code No.

Symptom

Probable cause of malfunction

Diagnostic

code

50

Faulty ECU memory. When this

malfunction is detected, the code

number might not appear on the

meter.

S Malfunction in ECU. (The program and data are not

properly written on or read from the internal memory.)

—

Er-1

No signals are received from the ECU.

S Open or short circuit in wiring sub lead.

S Malfunction in meter.

S Malfunction in ECU.

—

Er-2

No signals are received from the ECU

within the specified duration.

S Improper connection in wiring sub lead.

S Malfunction in meter.

S Malfunction in ECU.

—

Er-3

Data from the ECU cannot be

received correctly.

S Improper connection in wiring sub lead.

S Malfunction in meter.

S Malfunction in ECU.

—

Er-4

Non-registered data has been

received from the meter.

S Improper connection in wiring sub lead.

S Malfunction in meter.

S Malfunction in ECU.

—