Yamaha YFM70RY Service Manual page 334

Fault code No. 33
Diagnostic code No.
Order Item/components and probable
cause
1 Connections
• Ignition coil connector (primary coil
side)
• Main wire harness-ECU coupler
2 Open or short circuit in wire harness.
3 Defective ignition coil
Symptom Malfunction detected in the primary lead of the ignition
coil.
d30 Ignition coil
FUEL INJECTION SYSTEM
Check or maintenance job
• Check the connector and cou-
pler for any pins that may have
pulled out.
• Check the locking condition of
the connector and coupler.
• If there is a malfunction, repair it
and connect the connector or
coupler securely.
• Repair or replace if there is an
open or short circuit.
• Between ignition coil connector
and ECU coupler.
(orange–orange)
• Between ignition coil connector
and left handlebar switch cou-
pler.
(red/black–red/black)
• Execute the diagnostic mode.
(Code No. d30)
• Test the primary and secondary
coils for continuity.
• Replace if defective.
Refer to "CHECKING THE IG-
NITION COIL" on page 8-67.
8-45
Reinstatement
method
Starting the en-
gine and oper-
ating it at idle.