FI
Checking the engine trouble warning light bulb
The engine trouble warning light comes on for 3 seconds after main switch has been turned to
“ON”. If the warning light does not come on under these conditions, the warning light bulb may be
defective.
FUEL INJECTION SYSTEM
SELF-DIAGNOSTIC FUNCTION TABLE
If the ECU detects an abnormal signal from a sensor while the vehicle is being driven, the ECU
illuminates the engine trouble warning light and provides the engine with alternate operating instructions
that are appropriate for the type of malfunction.
When an abnormal signal is received from a sensor, the ECU processes the specified values that
are programmed for each sensor in order to provide the engine with alternate operating instructions
that enable the engine to continue to operate or stop operating, depending on the conditions.
Self-Diagnostic Function table
6-5
Fault
code No.
Item Symptom
Fail-safe
action
Able /
unable
to start
Able /
unable
to drive
12
Crankshaft position
sensor
No normal signals
are received from
the crankshaft
position sensor.
Stops the engine (by
stopping the injection
and ignition).
Unable Unable
13
Intake air pressure
sensor
(open or short circuit)
Intake air pressure
sensor: open or
short circuit
detected.
Stops the engine (by
stopping the injection
and ignition)
Able Able
14
Intake air pressure
sensor
(hose line)
Intake air pressure
sensor: hose system
malfunction
(clogged or
detached hose).
Intake air pressure
Able
Able
15
Throttle position
sensor (open or short
circuit)
Throttle position
sensor: open or
short circuit
detected.
Intake air pressure
Able
Able
16
Throttle position
sensor
(stuck)
Throttle position
sensor is stuck
Fixes the temperature to
20°C
Able Able
a
Main switch “OFF”
b
Main switch “ON”
c
Engine trouble warning light off
d
Engine trouble warning light on for 3 seconds
a
a
a
a
a
c
c
c
c
c
d
d
d
d
d
b
b
b
b
b
c
c
c
c
c
Summary of Contents for YBR250 2007
Page 1: ...YBR250 SERVICE MANUAL 5D1 F8197 E0 2007 ...
Page 2: ......
Page 359: ...YAMAHA MOTOR DA AMAZÔNIA LTDA ...
