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Test NTC-9A: Checking Minimum Idle Airflow

NOTE: Perform TEST NTC-1A: NO TROUBLE CODES (NTC) TESTS  before proceeding.
  1. Turn ignition off. Disconnect PCV valve hose from intake manifold. Cap port at intake manifold. Disconnect idle purge hose from throttle body. Install Orifice (6457) to purge hose port of throttle body. Start engine. Allow engine to reach operating temperature of more than 180° (82°C). Using scan tool, actuate minimum airflow. If engine speed is 550-700 RPM, go to next step. If engine speed is not 550-700 RPM, replace throttle body. Perform TEST VER-2A: ROAD TEST VERIFICATION .
  2. Turn engine off. Remove throttle body from engine. With throttle fully open on throttle body, clean throttle body with parts cleaner. Using soft brush or pad, ensure throttle body bore and throttle plate are clean. Dry throttle body with compressed air.
  3. Reinstall throttle body. Recheck throttle body minimum airflow. If throttle body minimum airflow idle speed is 550-700 RPM, throttle body is okay. Test is complete. Perform TEST VER-2A: ROAD TEST VERIFICATION . If throttle body minimum airflow idle RPM is not 550-700 RPM, replace throttle body. Perform TEST VER-2A: ROAD TEST VERIFICATION .
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