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
- PCM connector observable defect
- Idle air control motor defective
- IAC # 1 driver circuit shorted to ground
- IAC # 1 driver ckt shorted to another driver ckt
- IAC # 2 driver circuit shorted to ground
- IAC # 2 driver ckt shorted to another driver ckt
- IAC # 3 driver circuit shorted to ground
- IAC # 3 driver circuit shorted to IAC # 4 driver ckt
- IAC motor circuit wiring harness intermittent def
- IAC Motor circuit wiring harness observable defect