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.
NOTE:
After each service or repair procedure has been completed, reconnect all components. Clear DTCs and repeat QUICK TEST procedures to ensure all electronic engine control systems are working properly and DTCs are no longer present.
Any detected malfunction of AP sensor will illuminate MIL (Econoline) or SERVICE ENGINE SOON indicator (F650-750). An AP signal that is detected out of range (high or low) by PCM will cause engine to ignore AP signal and will only allow engine to operate at low idle. If a disagreement in state of Idle Validation Switch (IVS) and AP sensor is detected by PCM, engine will only be allowed to operate at low idle. Perform this test when directed by QUICK TEST. This test is only intended to diagnose the following components and circuits:
- AP Sensor
- Wiring Harness Circuits; (AP, AP GND & VREF)
- Powertrain Control Module (PCM)