Idle Speed And Idle Air Control (Iac) Duty Inspection - Suzuki GF60A Service Manual

Idle Speed and Idle Air Control (IAC) Duty
Inspection
Inspect idle speed and IAC Duty
Initially after 20 hours (1 month) and every 200 hours
(12 months)
NOTE
Before checking idle speed / IAC duty, make
sure of the following.
• Engine must be warmed up.
• Check idle speed after engine speed has
stabilized.
• Check throttle link mechanism and throttle
valve for smooth operation.
• Lead wire and hoses of electronic fuel
injection and engine control systems are
connected securely.
• Ignition timing is within specification.
• Tappet clearance is checked according to
maintenance schedule.
• No abnormal air drawn in from air intake
system. After all items are confirmed,
check idle speed and IAC duty.
1
1. Throttle body
Check idle speed and IAC duty as follows. To perform
idle speed and IAC duty inspection, use personal
computer and SDS tool.
1) Connect SDS tool to engine.
Refer to SDS operation manual for the step 1
procedure.
2) Start engine and allow to warm up.
3) Check engine speed and IAC duty by using "Service
data / Engine data" mode on SDS.
4) If IAC duty and / or idle speed is out of specification,
inspect idle speed control system referring to "Idle air
control system check".
Idle speed in neutral gear (IAC duty)
750 – 850 r/min (Duty: Approx. 0 – 30%)
5) Shift into forward, Check in-gear idle speed.
If not, check idle air control system.
ZAJ6110206007
NOTE
• Trolling speed (in-gear idle speed) is same
as idle speed.
• Idling / trolling speed of 750 – 850 r/min. is
controlled by IAC system.
Idle speed in gear (IAC duty)
750 – 850 r/min (Duty: Approx. 0 – 30%)
Ignition Timing Inspection
Inspect ignition timing
Every 200 hours (12 months)
NOTE
Before checking the ignition timing, make
sure idle speed is adjusted within
specification.
1) Start the engine and allow to warm up.
2) Attach the timing light cord to the No.1 ignition coil
(1) primary wire.
Special tool
IAJ611020025-01
3) Check the ignition timing while operating the engine
in neutral gear at 1 000 r/min.
Ignition timing
Approx. BTDC 5° at 1 000 r/min
Maintenance and Tune-Up:
(A): 09930–76420 (Timing light)
(A)
(A)
0B-13
ZAJ6110206008
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IAJ611020026-01
IAJ611020027-01