Yamaha RS Venture RST90GTY 2009 Mode D'emploi page 143

Fault code No. 35
Diagnostic code No. d:32 (cylinder-#3 ignition coil)
Order Item/components and probable cause
1 Connections
• Cylinder-#3 ignition coil coupler
• Wire harness ECU couplers
• Ignition system sub-wire harness coupler
2 Open or short circuit in wire harness
and/or ignition system sub-wire harness.
3 Detective cylinder-#3 ignition coil.
Fault code No. 37
Diagnostic code No. d:54 (ISC (idle speed control) unit)
Order Item/components and probable cause
1 Throttle valve does not fully close.
2 ISC valve is stuck fully open due to dis-
connected ISC unit coupler. (High
engine idle speed is detected with the
ISC valve stuck fully open even though
signals for the valve to close are continu-
ously being transmitted by the ECU.)
3 ISC valve is not moving correctly.
FUEL INJECTION SYSTEM
Symptom Malfunction detected in the primary lead of the cylinder-#3 ignition coil.
Check or maintenance job
Check the couplers for any pins that may have
pulled out.
Check the locking condition of the couplers.
If there is a malfunction, repair it and connect the
coupler securely.
Repair or replace if there is an open or short cir-
cuit.
Between the cylinder-#3 ignition coil coupler and
ECU couplers.
Orange/Green – Orange/Green
Red/White – Red/White
Execute the diagnostic mode (code No. d:32).
Test the primary and secondary coils for continu-
ity.
Replace if defective.
Refer to "IGNITION SYSTEM" in CHAPTER 8.
Symptom Engine speed is high when the engine is idling.
Check or maintenance job
Check the throttle body.
Refer to "THROTTLE BODY".
Check the throttle cable.
Refer to "THROTTLE CABLE FREE PLAY
ADJUSTMENT" in CHAPTER 2.
Check that the ISC unit coupler is not discon-
nected.
The ISC valve is stuck fully open if it does not
operate when turning the main switch off.
(Touch the ISC unit with your hand and check if it
is vibrating to confirm if the ISC valve is operat-
ing.)
TIP
Do not remove the ISC unit.
Execute the diagnostic mode (code No. 54).
After the ISC valve is fully closed, it opens to the
standby opening position. This operation takes
approximately 12 seconds. Start the engine. If the
error recurs, replace the throttle body assembly.
65
FI
Reinstatement
method
Starting the
engine and
operating it at
idle.
Reinstatement
method
ISC valve
returns to its
original position
by setting the
engine stop
switch to "RUN"
and turning the
main switch on
and off.
Reinstated if the
engine idle
speed is within
specification
after starting the
engine.