Idle Speed & Ignition Timing

Ensure idle speed and base ignition timing are set to specification. See IDLE SPEED SPECIFICATIONS and IGNITION TIMING tables. If necessary, see ON-VEHICLE ADJUSTMENTS article for adjustment procedures. If scan tool is available, check for correct IAC duty. See IAC DUTY AT SPECIFIED IDLE SPEED table.

IDLE SPEED SPECIFICATIONS ⁽¹⁾

Application

Idle RPM

Aerio

A/C Off

700-800

A/C On

Automatic

700-800

Manual

800-900

Esteem

A/C Off

Auto. Transaxle

700-800

Man. Transaxle

650-750

A/C On

800-900

Grand Vitara

A/C Off

700-800

A/C On

750-850

Vitara

A/C Off

700-800

A/C On

1.6L

800-900

2.0L

750-850

XL-7

A/C Off

640-740

A/C On

700-800

⁽¹⁾	Transaxle or transmission in Neutral or Park.

IAC DUTY AT SPECIFIED IDLE SPEED⁽¹⁾

Application

⁽²⁾ Percent

Aerio

35-45

Esteem 1.6L (Low Altitude)

3-30

Esteem 1.6L (High Altitude)

3-40

Esteem 1.8L

10-50

Grand Vitara

10-50

Vitara 1.6L & 2.0L

2-30

XL-7

5-40

⁽¹⁾	See IDLE SPEED SPECIFICATIONS table.

⁽²⁾	Engine at normal operating temperature with A/C off (if equipped).

IGNITION TIMING (Degrees BTDC @ RPM) ⁽¹⁾

Application

Timing Setting

Aerio ⁽³⁾

⁽⁴⁾ 4-6 @ 700-800

Esteem

⁽²⁾ 2-8 @ 750-850

Grand Vitara ⁽³⁾

⁽⁴⁾ 4-6 @ 750-850

Vitara

⁽⁴⁾ 4-6 @ 750-850

XL-7 ⁽³⁾

⁽⁴⁾ 4-6 @ 750-850

⁽¹⁾	See ON-VEHICLE ADJUSTMENTS article for adjustment procedures.

⁽²⁾	With jumper wire installed between terminals "D" and "E" of test connector located in relay box. See Fig 1.

⁽³⁾	Adjust CMP sensor to change ignition timing.

⁽⁴⁾	Suzuki scan tool connected to DLC required to check timing. See Fig 2.

NOTE: Ensure ignition timing advances as engine speed increases.

Fig 1: Identifying Test Connector Terminals (Esteem)

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: Identifying Suzuki Scan Tool Hookup To Data Link Connector

Courtesy of SUZUKI OF AMERICA CORP.