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Test TC-138B - Target Idle Not Reached

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION  Directory. For wiring diagram, see WIRING DIAGRAMS article.
  1. Turn ignition off. Disconnect PCV valve hose from intake manifold. Cap intake manifold vacuum port. Disconnect purge hose from throttle. Install Orifice (6457) onto throttle purge hose port. Start engine. Allow engine to reach operating temperature.
  2. Using scan tool, actuate minimum airflow. If engine speed is less than 550 RPM, go to next step. If engine speed is 550 RPM or more, replace throttle. Perform TEST VER-2A.
  3. Remove throttle from engine. Using appropriate cleaner, clean throttle plate and throttle bore. Dry throttle with compressed air. Install throttle onto engine. Start engine. Using scan tool, actuate minimum airflow. If engine speed is less than 550 RPM, replace throttle. Perform TEST VER-2A. If engine speed is 550 RPM or more, test is complete. Perform TEST VER-2A.
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