Suzuki LS650 Savage - Automatic Decompression Control System; Control and Testing

ELECT RI CAL SYSTEM
A utom atic Decompression Con t ro l System
The 3UIOmatic decompre ssion control system
(F igur e 106 ) automatically operates a solenoid that
actuates the decompression lever. The
decompression lever opens the exhaust valves a
small amount in order to relieve co mpression
during the starting
cycle. Thi s makes it easier for
the s
tarter to turn the engine over initially.
•
I
'
5
I l
=
=
4
5
= =
Control unll
12V
battery
,
III
J
=
6
=
DC Voltmeter
245
With the ignition switch ON. the clUlch lever
pu ll ed in and starter bUllon pre ssed in. the circuit
from the battery is
completed and 12 volts are
applied
to the No.2 terminal of the co ntrol unit.
When the 12
vO llS reach the Timer I. it is aClivaled
a ll owi ng the 12 volts to reach the No.3 terminal
of the contro l unit. AI this time. the con lrol unit
activates the
decompres sion solenoid which
operates the decompression leve r. About 0.2
seconds after the s tarter button is pressed, the
Timer II is activated and 12 volts reach the No.4
terminal on the control unit. At this time, the s taner
solenoid is energized and the st arter motor starts
to turn.
The operation of the Timer I is 0.7 seconds
and the
Timer II sh ut s off the solenoid 0.5 seconds
after starter motor
StllrtS turning. This allows the
d
ecompression lever to return to its normal
position.
Con trol unil t ~sting
I. Remove the scat as described Chapter Twelve.
2. Remove the fuel tank
as described in Chapter
Seven.
3. Disconnect the electrica l connector from the
control unit (
Figure 10 7).
NOTE
The following resrs are to be made 0"
/he terminals of the co ntrol un it
( Figur~ J0 8).
4. To test the Time r I portion of the control unit.
refer
to Figure 109 and perform the following:
a.
Set a DC voltmeter to the DC 25 V range.
b.
Connect the voltmeter's positive (+) lead to
the
No .3 terminal and the negative (-) lead
to the
No.5 terminal.
c. Using small
jumper wire s, connect a 12-volt
battery as
follows; positive (+) to the No. I
and No.2 terminals and the negative (-) to the
No.5 terminal.
d.
The voltmeter sho uld read 12 volts for 0.7
seconds and then return to 0 volts.
e.
If this does not occur, the Timer I portion of
the contro l unit is faulty and the co ntrol unit
mU St be replaced.