Idle Speed

NOTE: Before adjusting idle speed, warm engine to normal operating temperature. Turn off all accessories. Place transmission in Neutral (M/T) or Park (A/T). Wait for cooling fan to stop. DO NOT adjust idle using throttle adjusting screw. Throttle adjusting screw is preset and if adjusted, will adversely affect engine performance.

Connect New Generation Star (NGS) Tool (49 T088 0A0) to data link connector 2 located under left side of dash. See Figure . Using NSG tool, select PID/DATA MONITOR AND RECORD and monitor RPM. Connect Diagnostic Tool (49 B019 9A0) to data link connector. Set SYSTEM SELECT to position 1 and TEST SWITCH to SELF-TEST.
If idle speed is not within specification, rotate air adjusting screw on throttle body. See Fig 1 . See IDLE SPEED SPECIFICATIONS TABLE . Disconnect NGS tool from data link connector 2 and diagnostic tool from data link connector.

Fig 1: Rotating Air Adjusting Screw (Typical)

Courtesy of MAZDA MOTORS CORP.

IDLE SPEED SPECIFICATIONS

Application

M/T: RPM

⁽¹⁾ A/T: RPM

1.5L

700

750

1.8L

750

⁽¹⁾	Place automatic transmission in Park.