P0505

Test 1:

Tests 2 - 6:

Tests 7 - 11:

Tests 12 - 17:

Tests 18 - 23:

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 shorted 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 wiring harness observable problem
- IAC motor wiring harness intermittent problem
- 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
- 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
- Powertrain Control Module (IAC # 1 driver)
- Powertrain Control Module (IAC # 2 driver)
- Powertrain Control Module (IAC # 3 driver)
- Powertrain Control Module (IAC # 4 driver)