P0505

Tests 397 - 402:

Tests 403 - 407:

Tests 408 - 411:

Tests 412 - 415:

Tests 416 - 420:

Tests 421 - 424:

Tests 425 - 428:

Tests 429 - 433:

Tests 434 - 438:

Tests 439 - 443:

Tests 444 - 448:

Tests 449 - 453:

Tests 454 - 458:

Tests 459 - 462:

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 Idle Air Control (IAC) driver circuits for 2.75 seconds while the IAC motor is active.

POSSIBLE CAUSES
- IAC motor circuit wiring harness observable defective
- IAC motor circuit wiring harness intermittent defective
- 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
- IAC motor defective
- IAC # 1 driver circuit shorted to ground
- IAC # 2 driver circuit shorted to ground
- IAC # 3 driver circuit shorted to ground
- PCM defective (IAC # 1 driver)
- PCM defective (IAC # 2 driver)
- PCM defective (IAC # 3 driver)
- PCM defective (IAC # 4 driver)