Yamaha YZF-R15, Service Manual

Page: 290 / 338

8-34 8-33
FUEL INJECTION SYSTEM FUEL INJECTION SYSTEM
TROUBLESHOOTING METHOD
The engine operation is not normal and the
engine trouble warning light comes on.
1. Check:
• Fault code number
a. Check the fault code number displayed on
the FI diagnostic tool or Meter.
b. Identify the faulty system with the fault code.
Refer to “Self-Diagnostic Function table”.
c. Identify the probable cause of the malfunc-
tion. Refer to “Diagnostic code table”.
2. Check and repair the probable cause of mal-
function.
3. Perform Fuel Injection System reinstatement
action.
Refer to “Reinstatement method” of table in
“TROUBLESHOOTING DETAILS” on page
8-40.
4. Turn the main switch to “OFF” and back to
“ON”, then check that no fault code number is
displayed.
If fault codes are displayed, repeat steps (1) to
(4) until no fault code number is displayed.
5. Erase the malfunction history in the diagnos-
tic mode. Refer to“Sensor operation table
(Diagnostic code No. 62)”.
Turning the main switch to “OFF” will not erase
the malfunction history.
Fault code No. No fault code No.
Check and repair.
Refer to “TROUBLE-
SHOOTING DE-
TAILS” on page 8-40.
Monitor the opera-
tion of the sensors
and actuators in the
diagnostic mode. Re-
fer to “Sensor opera-
tion table” and
“Actuator operation
table”. Check and repair.
Refer to “Self-Diag-
nostic Function ta-
ble”.
The engine operation is not normal but the
engine trouble warning light does not come
on.
1. Check the operation of following sensors and
actuators in the Diagnostic mode. Refer to
“Sensor operation table” and “Actuator oper-
ation table”.
If a malfunction is detected in the sensors or
actuators, repair or replace all faulty parts.
If no malfunction is detected in the sensors
and actuators, check and repair inner parts of
the engine.
30: Ignition coil
36: Fuel injector
ssssssssssssssssssssssssssss
ssssssssssssssssssssssssssss
Self-Diagnostic Function table
Fault
code No.
Item Symptom
Able / un-
able to start
Able / un-
able to
drive
12
Crankshaft position
sensor
No normal signals are received
from the crankshaft position sen-
sor.
Unable Unable
13
Intake air pressure
sensor
(open or short circuit)
Intake air pressure sensor: open
or short circuit detected.
Able Able
14
Intake air pressure
sensor
(clogged pressure de-
tect hole)
Intake air pressure sensor:
clogged pressure detect hole.
Able Able
15
Throttle position sen-
sor
(open or short circuit)
Throttle position sensor: open or
short circuit detected.
Able Able
16
Throttle position sen-
sor
(stuck)
Throttle position sensor is stuck Able Able
21
Coolant temperature
sensor Coolant temperature sensor: open
or short circuit detected.
Able Able
22
Intake air tempera-
ture sensor
(open or short circuit)
Intake air temperature sensor:
open or short circuit detected.
Able Able
30
Lean angle sensor
(latch up detected) No normal signal is received from
the lean angle sensor.
Unable Unable
33
Ignition coil
(open circuit) Primary lead of the ignition coil:
open circuit detected.
Unable Unable
39 Fuel injector
Fuel injector: open or short circuit
detected.
Unable Unable
41
42
Lean angle sensor
(open or short circuit)
(open or short circuit)
Speed Sensor
Lean angle sensor: open or short
circuit detected.
No Normal Signals are received
from the speed sensor
Unable Unable
Able Able
44
Error in reading from
or writing on
EEPROM
Error is detected while reading
from or writing on EEPROM (CO
adjustment value, code re-regis-
tering key code, and throttle valve
fully closed notification value).
Able Able
46
Vehicle system power
supply
(Monitoring voltage)
Power supply to the fuel injection
system is not normal.
Able Able
50
ECU internal malfunc-
tion
(memory check error)
Faulty ECU memory. (When this
malfunction is detected in the
ECU, the fault code number might
not appear on the meter.)
Unable Unable
Start unable warning
Engine trouble warning light flash-
es when the start switch is turned
ON.
Unable Unable