Idle Speed

CAUTION: DO NOT attempt to adjust throttle stop screw to adjust idle. Throttle stop screw is factory-set and is used as zero reference point for all other adjustments.

NOTE: DO NOT adjust idle speed in areas above 8200 ft. elevation.

IDLE SPEED SPECIFICATIONS ⁽¹⁾

Application

Idle RPM

A/C Off

750-850

A/C On

850-950

⁽¹⁾	Transaxle or transmission in Neutral or Park.

IAC DUTY AT SPECIFIED IDLE SPEED ⁽¹⁾

Application

⁽²⁾ Percent

1.8L

⁽¹⁾	See IDLE SPEED SPECIFICATIONS table.

⁽²⁾	With A/C turned off (if equipped).

Idle speed is controlled by IAC valve and should not require adjustment. If idle speed needs to be changed, start engine and allow it to reach normal operating temperature. Turn all accessories off. Ensure all fuel and emission control system wire connectors and hoses are properly connected. Ensure accelerator cable has free play. Ensure air cleaner and ducts are properly installed and air filter element is in good condition.
Ensure ignition timing is correct. See IGNITION TIMING table under IGNITION TIMING. Using a fused jumper wire, connect terminal No. 2 (diagnosis switch) to terminal No. 4 (ground) at test connector. See Figure . Attach a duty meter to duty output terminal No. 6 and ground terminal No. 4. Remove idle speed adjusting screw protective cap from top of throttle body. See Fig 1 . Turn idle speed adjusting screw to obtain correct idle RPM. See IDLE SPEED SPECIFICATIONS and IAC DUTY AT SPECIFIED IDLE SPEED tables.
On vehicles equipped with A/C, turn A/C switch to ON position. With A/C operating correctly, verify idle is 850-950 RPM. If idle speed is not within specification, check A/C ON signal circuit. After adjustments, remove service wire and reinstall protective cap on throttle body. Recheck idle speed.

Fig 1: Identifying Idle Speed Adjusting Screw

Courtesy of SUZUKI OF AMERICA CORP.