Operation Check

Remove IAC motor from throttle body. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. Manufacturer recommends connecting Test Connector (MB991709) to IAC motor during testing procedure. Connect battery voltage to IAC terminals No. 2 and 5. See Fig 1 . Connect ground to the following IAC terminals in the following order:

1. Terminals No. 1 and 4.
2. Terminals No. 3 and 4.
3. Terminals No. 3 and 6.
4. Terminals No. 1 and 6.
5. Terminals No. 1 and 4.

Repeat steps in reverse sequence. If IAC motor vibrates while testing, IAC is okay. If IAC motor does not vibrate during testing, replace IAC motor.

Fig 1: Identifying IAC Motor Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.