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4-Cylinder Idle Speed

NOTE: Idle speed is controlled by PCM and is not adjustable. Slight fluctuations in idle speed are considered normal. Start and run engine for at least 7 minutes to establish PCM control of idle.
  1. Warm engine to normal operating temperature. Turn ignition off. Connect IAC Tool (SA9195E) to IAC valve electrical connector. Move lever on tool downward to completely seat IAC valve pintle. Insert IAC Air Plug (SA9106E) in throttle body assembly. Connect scan tool to Data Link Connector (DLC).
  2. Start engine and check idle speed. Idle speed should be between zero (stall) and 700 RPM. If idle speed is not as specified, check for vacuum leaks or binding throttle blade. Clean throttle bore if necessary.
  3. If idle speed is greater than 700 RPM after repairs, replace throttle body. DO NOT adjust minimum idle speed screw. Turn engine off. Remove IAC tool and reconnect IAC valve electrical connector. Check Throttle Position (TP) sensor voltage. See TP SENSOR VOLTAGE  table under THROTTLE POSITION (TP) SENSOR.
  4. Remove IAC air plug. Start engine and verify proper idle operation. If proper idle operation cannot be obtained, see TESTS W/CODES article.
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