TESTING

Place a stethoscope (a long screwdriver works also, just place the screwdriver on the IAC and place your ear on or near the handle) on the IAC motor. Have an assistant turn the key ON with the engine OFF, and listen to the IAC motor. Several clicks should be heard as the stepper motor moves. If the clicks are heard, the driver in the PCM and the circuit are OK.

If the driver and circuits test OK, detach the connector from IAC motor. Using an ohmmeter, probe the connector on the IAC motor, NOT THE WIRING HARNESS> between pins 2 and 1, and pins 2 and 3. Resistance should measure between 28–33 ohms. If the resistance values are different replace the IAC motor. If the tests between pins 1, 2, and 3 are within specification, check the resistance between pins 5 and 4, and pins 5 and 6. Resistance should measure between 28–33 ohms. If the resistance values are different replace the IAC motor.