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Test TC-138B: Target Idle Not Reached

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . 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 body. Install Orifice (6457) onto throttle body 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 body. Perform TEST VER-2A .
  3. Remove throttle body from engine. Using appropriate cleaner and soft scuff pad, clean throttle plate and throttle bore. Dry throttle body with compressed air. Install throttle body onto engine. Start engine. Using scan tool, actuate minimum airflow. If engine speed is less than 550 RPM, replace throttle body. Perform TEST VER-2A . If engine speed is 550 RPM or more, test is complete. Perform TEST VER-2A .
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