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Home >> Plymouth >> 1995 >> Acclaim 2.5 K >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.5L Flex Fuel >> Test NTC-9A >> Checking Idle Air Control Motor

Checking Idle Air Control Motor

NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS - 2.5L FLEXIBLE FUEL article.
  1. Using scan tool, set engine speed to 1100 RPM. If engine speed set at 1050-1150 RPM, idle speed motor is operating properly, test is complete. If engine speed did not set at 1050-1150 RPM, return engine to normal idle speed. Disconnect idle air control motor connector.
  2. Put scan tool in voltmeter mode. Using scan tool, check voltage on idle air control motor connector Brown/White wire while momentarily opening and closing throttle. If voltage is less than one volt, go to TEST NTC-9B. If voltage is more than one volt, go to next step.
  3. Using scan tool, check voltage on idle air control motor connector Yellow/Black wire while momentarily opening and closing throttle. If voltage is less than one volt, go to TEST NTC-9B. If voltage is more than one volt, go to next step.
  4. Using scan tool, check voltage on idle air control motor connector Gray/Red wire while momentarily opening and closing throttle. If voltage is less than one volt, go to TEST NTC-9B. If voltage is more than one volt, go to next step.
  5. Using scan tool, check voltage on idle air control motor connector Violet/Black wire while momentarily opening and closing throttle. If voltage is less than one volt, go to TEST NTC-9B. If voltage is more than one volt, go to next step.
  6. Check engine for vacuum leaks. Repair as required. Perform TEST VER-2. If no vacuum leaks are observed, replace idle air control motor. Perform TEST VER-2.
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