Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford RV Cutaway, 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, and 2003 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
Perform this test when directed by QUICK TEST. This test is only intended to diagnose the following components and circuits:
- Wiring Harness Circuits (B+, MIAH, MIAHM & VPWR)
- Manifold Intake Air Heater (MIAH)
- MIAH Relay
- Powertrain Control Module (PCM)
PCM will activate intake air heater to reduce White smoke during long idle periods under the following conditions.
- Ambient Temperature Must Be Less Than 32°F (0°C)
- Engine Oil Temperature Must Be Less Than 131°F (55°C)
- Vehicle Power (IVPWR) Must Be 11.8-15.0 Volts
- Parking Brake Must Be Applied On M/T Models
- Gearshift Lever Must Be In Park Or Neutral On A/T Models
- Glow Plugs Must Be Off
NOTE:
MIAH is not available on F650-750 models.