Yamaha XV19SW Service Manual page 406

Fault code No. Er-3 Symptom Data from the ECU cannot be received correctly.
Diagnostic code No.
Order Item/components and probable
cause
1 Connections
• Main wire harness ECU coupler
• Main wire harness meter assembly
coupler
2 Open or short circuit in wire harness.
3 Malfunction in meter assembly.
4 Malfunction in ECU.
Fault code No. Er-4 Symptom Non-registered data has been received from the meter.
Diagnostic code No.
Order Item/components and probable
cause
1 Connections
• Main wire harness ECU coupler
• Main wire harness meter assembly
coupler
2 Open or short circuit in wire harness.
3 Malfunction in meter assembly.
4 Malfunction in ECU.
— —
Check or maintenance job
• Check the coupler for any pins
• Check the locking condition of
• If there is a malfunction, repair it
• Repair or replace if there is an
• Between meter assembly cou-
Replace the meter assembly.
Replace the ECU.
— —
Check or maintenance job
• Check the coupler for any pins
• Check the locking condition of
• If there is a malfunction, repair it
• Repair or replace if there is an
• Between meter assembly cou-
Replace the meter assembly.
Replace the ECU.
7-62
FUEL INJECTION SYSTEM
that may be pulled out.
the coupler.
and connect the coupler se-
curely.
open or short circuit.
pler and ECU coupler
(yellow/blue–yellow/blue)
that may be pulled out.
the coupler.
and connect the coupler se-
curely.
open or short circuit.
pler and ECU coupler
(yellow/blue–yellow/blue)
Reinstatement
method
Turning the
main switch to
"ON".
Reinstatement
method
Turning the
main switch to
"ON".