AIS12 - Check IAC Circuit For Short to Ground

^ Key Off.

^ IAC solenoid disconnected.

^ Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

^ Install breakout box, Leave PCM disconnected.

^ Measure resistance between Test Pin 21 (IAC) and Test Pins 40/60 (PWR GND) at the breakout box and chassis ground.

^ Is each resistance greater than 10,000 ohms?

YES -- Replace damaged PCM. Remove breakout box. Reconnect all components. Rerun Quick Test.

NO -- Service short circuit. Reconnect all components. Rerun Quick Test.