Yamaha XV16AL Service Manual page 433

EB812000
SELF-DIAGNOSIS
The XV16AL/XV16ALC/XV16ATL/XV16ATLC features a self-diagnosing system for the follow-
ing circuit(s):
• throttle position sensor
• speed sensor
• decompression solenoid
• fuel level meter
If any of these circuits is defective, the respective condition code will be displayed by the
engine trouble indicator light or fuel level indicator light when the main switch is set to "ON"
(irrespective of whether the engine is running or not).
Indica-
Circuit
tor light
Throttle posi-
tion sensor
Speed sensor
Decompres-
sion solenoid
Fuel level
7
meter
NOTE:
When the main switch is turned on, the engine trouble indicator light and fuel level indicator
light in the meter assembly normally come on for 1.4 seconds and then go off. However, if
there is a malfunction, the corresponding indicator light then begins flashing when the
engine is stopped or comes on when the engine is running.
Defect(s)
• Disconnected • The ignitor unit stays set to the
• Short-circuit wide-open throttle ignition tim-
• Locked ing. The motorcycle can be rid-
den.
• The engine trouble indicator
light displays the condition code.
• Abnormal pulse • The engine speed limiter sets in
• Disconnected approximately 4,400 rpm.
• Short-circuit • The engine trouble indicator
light displays the condition code.
• Disconnected • The
• Short-circuit does not move.
• Over heated • The starter motor does not oper-
solenoid ate.
• Disconnected • The engine trouble indicator
thermistor in light displays the condition code.
solenoid
• Short-circuited
thermistor in
solenoid
• Disconnected • The fuel level meter displays the
• Short-circuit empty position.
• The fuel level indicator light dis-
plays the condition code.
SELF-DIAGNOSIS
System response
decompression solenoid
7 - 55
– +
ELEC
Condition code
When When
engine is engine is
stopped running
Blinks in Lights up
patterns
of 3
Blinks in Lights up
patterns
of 4
Blinks in Lights up
patterns
of 6
Blinks in Blinks in
patterns patterns
of 8 of 8