DTC P0505: Idle Air Control Motor Circuits: Description

Idle Air Control (IAC) motor voltage is monitored immediately after ignition is turned on with battery voltage at more than 11.5 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses a short to ground or battery voltage on any of the 4 IAC driver circuits while IAC motor is active. Possible causes for DTC to set are: defective IAC motor, defective PCM, defective connector or defective wiring.