Visual Inspection: Notes
WARNING: This page is about a different car, the 2007 Ford Expedition EL and 2007 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
A visual inspection will identify modifications or additions to the vehicle operating system that may affect diagnosis. Inspect the vehicle for non-Ford factory add-on devices such as:
- Electronic add-on items:
- air conditioning
- generator (alternator)
- engine turbo
- cellular telephone
- cruise control
- CB radio
- linear booster
- backup alarm signal
- computer
- Vehicle modification:
These items, if not installed correctly, will affect the PCM, transmission control module (TCM) or transmission function. Pay particular attention to add-on wiring splices in the PCM harness or transmission wiring harness, abnormal tire size or axle ratio changes.
- Leaks; refer to Leakage Inspection .
- Correct linkage adjustments; refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS article.