IDLE SPEED/IAC DUTY INSPECTION
Before idle speed/IAC duty check, make sure of the following.
Lead wires and hoses of Electronic Fuel Injection system is con-
nected securely.
Accelerator cable has some play, that is, it is not tight.
Valve lash is checked and adjusted according to maintenance
schedule.
Ignition timing is within specification.
All accessories (wipers, heater, lights, A/C, etc.) are out of service.
Air cleaner has been properly installed and is in good condition.
No abnormal air inhaling from air intake system.
ECM does not detect any malfunction DTC.
After above items are all confirmed, check idle speed and IAC duty
as follows.
NOTE:
Before starting engine, place transmission gear shift lever in
“Neutral”, and, set parking brake and block drive wheels.
[Using SUZUKI scan tool]
1) Connect SUZUKI scan tool to DLC (1) with ignition switch OFF.
Special Tool
(A): 09931-76011 (SUZUKI scan tool)
(B): Mass storage cartridge
(C): 09931-76030 (16/14 pin DLC cable)
2) Start engine and warm it up to normal operating temperature.
3) Check idle speed and IAC duty by using “DATA LIST” mode of
SUZUKI scan tool.
NOTE:
Check to ensure that radiator fan is not running and then
measure IAC-duty.
Duty values with (*) are applicable to vehicle used at high
place (higher than 2000 in or 6560 ft.)
When using SUZUKI scan tool:
ENGIINE AND EMISSION CONTROL SYSTEM
6E1-49
ENGINE IDLE SPEED AND IAC DUTY
A/C OFF
A/C ON
900
50 r/min.
3 – 30 or *40%
1000
50 r/min.
