P0505

Tests 1 - 4:

Tests 5 - 8:

Tests 9 - 12:

Tests 13 - 16:

Tests 17 - 19:

Test 20:

SYMPTOM
P0505 - IDLE AIR CONTROL MOTOR CIRCUITS

WHEN MONITORED
At power-up and battery voltage greater than 11.5 volts.

SET CONDITION
The PCM senses a shorted 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
- DTC not equal to freeze frame DTC
- Idle air control motor
- IAC motor circuit wiring harness intermittent defect
- IAC # 1 driver circuit open
- IAC # 2 driver circuit open
- IAC # 3 driver circuit open
- IAC # 4 driver 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 # 2, # 3 or # 4
- IAC # 2 driver circuit shorted to # 3 or # 4
- IAC # 3 driver circuit shorted to # 4
- Powertrain Control Module (IAC # 1)
- Powertrain Control Module (IAC # 2)
- Powertrain Control Module (IAC # 3)
- Powertrain Control Module (IAC # 4)