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Test TC-25B - Idle Air Control Motor Circuits

NOTE: For connector terminal idnetification, see CONNECTOR IDENTIFICATION DIRECTORY  table. For wiring diagram, see WIRING DIAGRAMS article.
  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector for damaged or pushed out terminals. Repair as necessary. Perform TEST VER-2A . If PCM connector terminals are okay, go to next step.
    NOTE: For next step, see the IAC DRIVER IDENTIFICATION  table for IAC motor wire color identification.
  2. Using an external ohmmeter, check resistance of IAC motor driver No. 1 wire between IAC motor connector and PCM connector terminal No. 57. If resistance is 5 ohms or more, repair open in IAC motor driver No. 1 wire. Perform TEST VER-2A . If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A .
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