P0505 Idle Air Control Motor Circuit

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