Yamaha 2007 XP500 Service Manual page 351

that enable the engine to continue to operate or stop operating, depending on the conditions.
The ECU (engine) takes fail-safe actions in two ways: one in which the sensor output is set to a pre-
scribed value, and the other in which the ECU (engine) directly operates an actuator. Details on the
fail-safe actions are given in the table below.
Self-Diagnostic Function
Fault code
No.
Crankshaft position sen-
12
sor
Intake air pressure sen-
13 sor
(open or short circuit)
Intake air pressure sen-
14 sor
(pipe system)
Throttle position sensor
15
(open or short circuit)
Throttle position sensor
16
(stuck)
Sidestand switch
19 (open circuit wire har-
ness to ECU (engine))
Coolant temperature
21
sensor
Intake air temperature
22
sensor
O sensor
24
2
30 Lean angle sensor
Ignition coil
33
(faulty ignition)
FID valve (stuck fully
37
open)
Lean angle sensor
41
(open or short circuit)
Fuel system voltage
43
(monitor voltage)
Error in writing the
44 amount of CO adjust-
ment on EEPROM
Vehicle system power
46 supply
(Monitoring voltage)
ECU (engine) internal
50 malfunction
(memory check error)
Item
No normal signals are received from
the crankshaft position sensor.
Intake air pressure sensor-open or
short circuit detected.
Intake air pressure sensor-pipe sys-
tem malfunction (clogged or detached
hose).
Throttle position sensor-open or short
circuit detected.
The throttle position sensor is stuck.
Open circuit is detected in the input
line from the sidestand switch to the
ECU (engine).
Coolant temperature sensor-open or
short circuit detected.
Intake air temperature sensor-open or
short circuit detected.
No normal signal is received from the
O sensor.
2
Latch up detected.
No normal signal is received from the
lean angle sensor.
Malfunction detected in the primary
wire of the ignition coil.
Engine speed is high when the engine
is idling.
Lean angle sensor-open or short cir-
cuit detected.
The ECU (engine) is unable to moni-
tor the battery voltage
(an open circuit in the line to the ECU
(engine)).
Error is detected while reading or writ-
ing on EEPROM (CO adjustment
value).
Power supply to the fuel injection sys-
tem is not normal.
Faulty ECU (engine) memory. (When
this malfunction is detected in the
ECU (engine), the fault code number
might not appear on the meter.)
FUEL INJECTION SYSTEM
Symptom
8-36
Able / Able /
unable to unable to
start drive
Unable Unable
Able Able
Able Able
Able Able
Able Able
Unable Unable
Able Able
Able Able
Able Able
Unable Unable
Unable Unable
Able Able
Unable Unable
Able Able
Able Able
Able Able
Unable Unable