Cleaning idle air control (IAC) valve connector

• Clean and grease engine control module (ECM) and idle air control (IAC) valve connectors Contact resistance and oxidation .

  Check whether the engine speed still dips

  Fig 1: Checking/Cleaning Connector

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Do the fault symptoms persist? 

• YES 

  Refer to Replacing component 

• NO 

  OKAY:  Troubleshooting has been completed.