On-Vehicle 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, Tech 1]




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

Special Tool
(A): SUZUKI scan tool, Tech 1
(B): Mass storage cartridge
(C): 14116 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".
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.