Operation CHARM: Car repair manuals for everyone.

Visual Inspection




Visual Inspection





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:
- A/C
- generator (alternators)
- 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 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 Leakage Inspection.
- Correct linkage adjustments, refer to Automatic Transmission/Transaxle.


Selector Lever Linkage Check

If the selector lever linkage is not correctly adjusted, hydraulic leakage can occur at the manual control valve and can cause a delay in engagements and/or slipping while operating. Refer to Automatic Transmission/Transaxle for selector lever linkage adjustment.


Check TSBs

Refer to all TSBs which pertain to the concern and follow the procedure.


Carry Out On-Board Diagnostic (OBD) Key ON Engine OFF (KOEO) and Key ON Engine Running (KOER) Self Test

After a road test, with the vehicle warm and before disconnecting any connectors, carry out the Self Test using the scan tool. Refer to Computers and Control Systems Information for diagnosis and testing of the powertrain control system.