Visual Inspection

WARNING: This page is about a different car, the 2006 Mercury Montego and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

This 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 amplifiers
- Backup alarm signal
- Computer
Vehicle modification:
- These items, if not installed correctly, will affect the powertrain control module (PCM) 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 .

Shift Linkage Check

Hydraulic leakage at the manual control valve can cause delay in engagements and/or slipping while operating if the linkage is not correctly adjusted. Refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS for shift linkage adjustment.

Check TSB

Refer to all technical service bulletins which pertain to the concern and follow the procedure.

Carry Out On-Board Diagnostics (KOEO, KOER)

After a road test, with the vehicle warm and before disconnecting any connectors, carry out the Quick Test using the scan tool. Refer to the INTRODUCTION - GASOLINE article for diagnosis and testing of the powertrain control system.