112 VL1500K5 (’05-MODEL)
FAST IDLE
The fast idle system is automatic type.
When the fast idle cam is turned by the secondary throttle valve
actuator, the cam pushes the lever on the throttle valve shaft
causing the throttle valve to open and raise the engine speed.
When the engine has warmed up, depending on the oil tempera-
ture, ambient temperature and lapsed time, the fast idle is can-
celled allowing the engine to resume idle speed.
FAST IDLE ADJUSTMENT
• Remove the seats. (
!
Page 121)
• Remove the speedometer and fuel inlet cover, frame head
covers and frame upper covers.
(
!
VL1500 Service Manual 6-3)
• Start up the engine and run it in idling condition for warming
up.
• Connect a tachometer and set the idle rpm to 1 000 rpm by
the throttle stop screw
1
.
• Check and adjust the TP sensor. (
!
Page 36)
• Turn the ignition switch OFF.
• Disconnect the TP sensor coupler
2
and install the test har-
ness.
• Start up the engine.
• Measure the TP sensor output voltage at the wire terminals
(between
+
Red and
-
Black).
"
TP sensor output voltage at idle position: Approx. 1.12 V
#
09900-28630: TPS test wire harness
09900-25008: Multi-circuit tester set
*
Tester knob indication: Voltage (
+
)
• Turn the ignition switch OFF.
• Remove the air cleaner box. (
!
Page 103)
• Disconnect the STVA coupler
3
.
Ambient Temp.
Fast idle rpm
Fast idle cancel-
ling time
–5 °C (23 °F)
1 400 – 2 000 rpm
Approx. 100 sec.
15 °C (59 °F)
1 400 – 2 000 rpm
Approx. 40 sec.
25 °C (77 °F)
1 400 – 2 000 rpm
Approx. 30 sec.
SA
MP
LE
