P0505

Tests 1 - 5:

Tests 6 - 11:

Tests 12 - 17:

Tests 18 - 21:

Tests 22 - 25:

Test 26:

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 Idle Air Control (IAC) driver circuits for 100 msec while the IAC motor is active.

POSSIBLE CAUSES
- PCM (IAC driver # 1)
- PCM (IAC driver # 2)
- PCM (IAC driver # 3)
- PCM (IAC driver # 4)
- IAC Internal failure
- IAC Motor driver circuit shorted to voltage
- IAC Motor driver circuit shorted to ground
- IAC Motor driver circuits open
- PCM - IAC 12 volt driver open
- PCM - IAC ground driver open
- DTC not equal to freeze frame DTC
- IAC Motor wiring harness intermittent problem
- IAC Motor
- 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
- 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 open
- IAC # 2 driver circuit open
- IAC # 3 driver circuit open
- IAC # 4 driver circuit open