Idle Speed Inspection

Before idle speed check, make sure of the following.

Lead wires, pipes and hoses of electronic fuel injection and engine and emission control systems are connected securely.
Ignition timing is within specification.
All electrical systems (wipers, heater, lights, A/C, etc.) are out of service.
Air cleaner has been properly installed and is in good condition.
There are no abnormal air drawn in from air intake system.
There are no obstruction in PCV valve or its hoses.
There are no DTC in ECM.
Check following item turn OFF by using "Data List" mode on scan tool.
- A/C Comp Relay
- A/C Switch
- Brake Switch
- Electric Load
- Blower Fan

After confirming all items, check idle speed and IAC throttle opening as follows.

NOTE: Before starting engine, place gear shift lever in "Neutral" (M/T model) or select lever in "P" range (CVT model), and set parking brake and block drive wheels.

With ignition mode of keyless push start system in "OFF" and connect SUZUKI scan tool to DLC (1).
Special Tool
1. SUZUKI scan tool (SUZUKI-SDT)
Fig 1: Identifying Data Link Connector
Courtesy of SUZUKI OF AMERICA CORP.
Warm up engine to normal operating temperature.
Check engine idle speed and "IAC throttle opening" using "Data List" mode on scan tool.
If check result is out of specification, check improper engine idle speed referring to "Improper engine idling or engine fails to idle" under ENGINE SYMPTOM DIAGNOSIS .

Engine idle speed

A/C OFF: 600 - 700 rpm (IAC throttle opening: 10 - 20%)

A/C ON: 700 - 800 rpm (IAC throttle opening: 15 - 25%)