P0505

Tests 1 - 6:

Tests 7 - 11:

Tests 12 - 16:

Tests 17 - 21:

Tests 22 - 25:

SYMPTOM
P0505 - 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 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
- IAC # 1 driver circuit shorted to ground
- IAC # 2 driver circuit shorted to ground
- IAC # 3 driver circuit shorted to ground
- IAC # 4 driver circuit shorted to ground
- IAC # 1 driver circuit shorted to IAC # 2, 3, or 4 driver circuit
- IAC # 2 driver circuit shorted to IAC # 3 or 4 driver circuit
- IAC # 3 driver circuit shorted to IAC # 4 driver circuit
- IAC motor circuit wiring harness intermittent defect
- IAC motor circuit wiring harness observable defect
- IAC motor defective
- PCM connector terminal damaged, pushed out, miswired
- PCM connector (IAC # 1)
- PCM connector (IAC # 2)
- PCM connector (IAC # 3)
- PCM connector (IAC # 4)
- PCM defective (IAC # 1)
- PCM defective (IAC # 2)
- PCM defective (IAC # 3)
- PCM defective (IAC # 4)