Idle Speed: Testing and Inspection

IDLE SPEED/IDLE AIR CONTROL (IAC) DUTY 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: 16/14 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.

Engine idle speed:
A/C OFF : 690 ± 50 r/min.
A/C ON : 750 ± 50 r/min.

IAC duty at specified idle speed:
5 - 40 % (at A/C OFF)

4. If duty and/or idle speed is out of specifications, check idle air control system referring to "DTC P0505 IDLE AIR CONTROL SYSTEM MALFUNCTION".
5. 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.