Checking IAC Motor

Tests 1 - 3:

Tests 4 - 8:

Tests 9 - 13:

Tests 14 - 16:

SYMPTOM
CHECKING THE IDLE AIR CONTROL MOTOR

POSSIBLE CAUSES
- IAC motor connector terminals
- PCM connector terminals
- Engine vacuum leaks
- IAC driver # 1 shorted to ground
- IAC driver # 2 shorted to ground
- IAC driver # 3 shorted to ground
- IAC driver # 4 shorted to ground
- IAC driver circuits # 2, # 3, # 4 shorted together
- IAC driver circuits # 1, # 2, # 3, # 4 shorted together
- IAC driver circuits # 3 and # 4 shorted together
- Idle air control motor