Yamaha YZF-R6(V) 2006 Service Manual page 376

Fault code No. 17
Diagnostic code No.
Order Item/components and probable
cause
1 Connections
• EXUP servo motor coupler
• Main wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Defective EXUP servo motor (potenti-
ometer circuit).
Fault code No. 18
Diagnostic code No.
Order Item/components and probable
cause
1 Connections
• EXUP servo motor coupler
• Main wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Defective EXUP servo motor.
4 Defective EXUP valve, pulley, and ca-
bles.
Symptom EXUP servo motor circuit: open or short circuit detected.
53 EXUP servo motor
Symptom EXUP servo motor is stuck.
53 EXUP servo motor
FUEL INJECTION SYSTEM
Check or maintenance job
• Check the couplers for any pins
that may be pulled out.
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
• Repair or replace if there is an
open or short circuit.
• Between EXUP servo motor
coupler and ECU coupler.
(blue–blue)
(white/red–white/red)
(black/blue–black/blue)
• Execute the diagnostic mode.
(Code No. 53)
• Replace if defective.
Check or maintenance job
• Check the couplers for any pins
that may be pulled out.
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
• Repair or replace if there is an
open or short circuit.
• Between EXUP servo motor
coupler and ECU coupler.
(black/green–black/green)
(black/red–black/red)
• Execute the diagnostic mode.
(Code No. 53)
• Replace if defective.
Replace if defective.
8-53
Reinstatement
method
Reinstated au-
tomatically if a
normal signal is
received.
Reinstatement
method
Turning the
main switch to
"ON".
It takes 3 sec-
onds at the
maximum be-
fore the origi-
nal state
returns.