P0505 Idle Air Control Motor Circuits

SYMPTOM
P-0505 IDLE AIR CONTROL MOTOR CIRCUIT

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
- IAC motor defective
- IAC motor driver (IAC # 1) circuit open
- IAC motor driver (IAC # 2) circuit open
- IAC motor driver (IAC # 3) circuit open
- IAC motor driver (IAC # 4) circuit open
- PCM conn (IAC # 1) term dam, pushed out or miswired
- PCM conn (IAC # 2) term dam, pushed out or miswired
- PCM conn (IAC # 3) term dam, pushed out or miswired
- PCM conn (IAC # 4) term dam, pushed out or miswired
- PCM connector observable defect
- IAC # 1 driver circuit shorted to ground
- IAC # 1 driver ckt shorted to another driver ckt
- IAC # 2 driver circuit shorted to # 3 or # 4
- IAC # 2 driver circuit shorted to ground
- IAC # 3 driver circuit shorted to ground
- IAC # 3 driver ckt shorted to IAC # 4 driver ckt
- IAC motor circuit wiring harness intermittent def
- IAC motor circuit wiring harness observable def
- PCM def (IAC # 1)
- PCM def (IAC # 2)
- PCM def (IAC # 3)
- PCM def (IAC # 4)