Idle Speed: Testing and Inspection

Before idle speed/IAC duty check, make sure of the following.
- Lead wires and hoses of engine/emission control systems are connected securely.
- Accelerator cable is adjusted.
- 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.
- ECM (PCM) 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" (shift selector lever to "P" range for A/T vehicle), and set parking brake and block drive wheels.

[Using SUZUKI scan tool]




1. Connect SUZUKI scan tool to DLC with ignition switch OFF.

Special Tool
(A): 09931-76011 (SUZUKI scan tool)
(B): Mass storage cartridge
(C): 14/16 pin DLC cable

2. Warm up engine to normal operating temperature.




3. Check IAC duty and idle speed by using "Data List" mode of SUZUKI scan tool.
If duty and/or idle speed is out of specifications, check idle air control system referring to Diagnostic Flow Table "DTC P0505 IDLE AIR CONTROL SYSTEM MALFUNCTION" in "Computers/Testing/Trouble Code Procedures".

4. Check that specified engine idle speed is obtained with A/C ON if vehicle is equipped with A/C.
If not, check A/C ON signal circuit and idle air control system.