Yamaha YZF-R15, Service Manual

Page: 304 / 338

8-47
FUEL INJECTION SYSTEM
Fault code No. 30 Symptom Rollover signal is received from the lean angle sensor.
Diagnostic code No. 08 Lean angle sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 The vehicle has overturned. Raise the vehicle upright. Turning the
main switch to
“ON” (however,
the engine can-
not be restarted
unless the main
switch is first
turned “OFF”).
2 Installed condition of the lean angle
sensor. Check for looseness or pinching.
3 Connections
• Lean angle sensor coupler
• Main wire harness ECU coupler • Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
4 Defective lean angle sensor. • Execute the diagnostic mode.
(Code No.08)
• Replace if defective.
Refer to “CHECKING THE
LEAN ANGLE SENSOR” on
page 8-68.
Fault code No. 33 Symptom Primary lead of the ignition coil: open circuit detected.
Diagnostic code No. 30 Ignition coil
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• Ignition coil connector (primary coil
side)
• Main wire harness ECU coupler
• Check the connector and cou-
pler for any pins that may be
pulled out.
• Check the locking condition of
the connector and coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
Starting the en-
gine.
2 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between ignition coil connector
and ECU coupler/main wire
harness.
(red/white–red/white)
(orange–orange)
3 Defective ignition coil. • Execute the diagnostic mode.
(Code No.30)
• Test the primary and secondary
coils for continuity.
• Replace if defective.
Refer to “IGNITION SYSTEM”
on page 8-1.
8-48
FUEL INJECTION SYSTEM
Fault code No. 39 Symptom Open or short circuit detected in injector.
Diagnostic code No. 36 Fuel injector
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• Injector coupler
• Main wire harness ECU coupler • 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.
Starting the
engine.
2 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between fuel injector coupler
and ECU coupler.
(red/white–red/white)
(orange/black–orange/black)
3 Defective primary injector. • Execute the diagnostic mode.
(Code No.36)
• Replace if defective.
Refer to “CHECKING THE
FUEL INJECTOR” on page 7-6.
Fault code No. 41 Symptom Lean angle sensor: open or short circuit detected.
Diagnostic code No. 08 Lean angle sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• Lean angle sensor coupler
• Main wire harness ECU coupler • Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
Turning the
main switch to
“ON”.
2 Open or short circuit in lead wire. • Repair or replace if there is an
open or short circuit.
• Between lean angle sensor
coupler and ECU coupler.
(blue/red–blue/red)
(yellow/green–yellow/green)
(black/blue–black/blue)
3 Defective lean angle sensor. • Execute the diagnostic mode.
(Code No.08)
• Replace if defective.
Refer to “CHECKING THE
LEAN ANGLE SENSOR” on
page 8-68.