P0505 Idle Air Control Motor Circuits

SYMPTOM
P-0505 IDLE AIR CONTROL MOTOR CIRCUITS

WHEN MONITORED
At key on and battery voltage greater than 11.5 volts.

SET CONDITION
The PCM senses a short to ground or battery voltage on any of the four IAC driver circuits for 2.75 seconds while the IAC motor is active.

POSSIBLE CAUSES
- IAC #4 driver circuit shorted to ground
- Idle air control motor defective
- Powertrain ctrl module connector observable defect
- IAC #1 driver circuit shorted to #2, #3, or #4
- IAC #1 driver circuit shorted to ground
- IAC #2 driver circuit shorted to #3 or #4
- IAC #2 driver circuit shorted to ground
- IAC #3 driver circuit shorted to #4
- IAC #3 driver circuit shorted to ground
- IAC motor wiring harness intermittent defect
- IAC motor wiring harness observable defect