P0505 - Idle Air Control Motor Circuits

Tests 1 - 2:

Tests 3 - 7:

Tests 8 - 12:

Tests 13 - 17:

Test 18:

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
- 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 # 4 driver circuit shorted to ground
- IAC motor wiring harness intermittent defect
- IAC motor wiring harness observable defect