Yamaha 2002 TDM900 Service Manual page 387

Er-4
Fault code No.
Diagnostic monitoring
code No.
Order Item / components
1 Connected state of connector
Main wiring harness ECU coupler
Main wiring harness meter coupler
2 Malfunction in meter unit.
3 Malfunction in ECU
FUEL INJECTION SYSTEM
Symptom Non-registered data has been received from the meter.
Check or maintenance job
Check the coupler for any pins that may have
pulled out.
Check the locking condition of the coupler.
If there is a malfunction, repair it and connect it
securely.
Replace the meter unit.
Replace the ECU.
7-24
FI
Restore
method
Reinstated
automatically
when it
receives a
normal signal.