The TCM or transmission control module is a mechanism that regulates a vehicle’s automatic transmission. The transmission control module, collects information that is used to calculate gear shifting.

Possible symptoms:

– Check engine light on with codes such as: P0700 P0607 P06B8 P0884
– Gear selector showing wrong gear or not engaging correct gear.
– Gear selector clicking or stuck in park.
– Random clicking actuator noises coming from transmission while the key on and the engine off.
– When vehicle comes to a stop it is unable to go forward again due to transmission failure mode.


Difficulty: Easy

Programming: Requires reprogramming from Ford dealership.

Compatibility:

2012 Ford Focus
2013 Ford Focus
2014 Ford Focus

2011 Ford Fiesta
2012 Ford Fiesta
2013 Ford Fiesta
2014 Ford Fiesta
2015 Ford Fiesta

IMG 1916 336x206 Ford Focus / Fiesta Transmission Control Module TCU TCM Location Removal Replacement

Part Number: A2C30743100

There are several revisions of this module, try to get the newest revision to insure reliability.

Part Location:

The Ford Focus & Fiesta power shift dual clutch TCM transmission control module is located near the driver side front fender well. It is attached to the side of the transmission. You’ll need to remove the front driver side tire and the inner fender to access it.

IMG 1909 336x252 Ford Focus / Fiesta Transmission Control Module TCU TCM Location Removal ReplacementIMG 1910 336x252 Ford Focus / Fiesta Transmission Control Module TCU TCM Location Removal Replacement

The TCM uses two large connectors. To disconnect and remove this module, lift the gray levers which will release the electrical connectors from the module.


Careful not to crack or break the plastic, they can get brittle with age.

IMG 1911 336x252 Ford Focus / Fiesta Transmission Control Module TCU TCM Location Removal Replacement

The TCM is held in place with 4 10mm bolts. It uses 2 o-rings that seal the TCM when mounted to the transmission. I recommend replacing the o-rings with new ones.

IMG 1908 336x252 Ford Focus / Fiesta Transmission Control Module TCU TCM Location Removal ReplacementIMG 1912 336x252 Ford Focus / Fiesta Transmission Control Module TCU TCM Location Removal Replacement

Once the TCM is removed, inspect the clock gears for wear or damage to the gear teeth. These clock gears directly affect the shifting and performance of the transmission.

IMG 1913 336x448 Ford Focus / Fiesta Transmission Control Module TCU TCM Location Removal Replacement

Inspect the electrical connectors for loose connections, broken pins, water corrosion or burnt wires. You’ll also want to make sure that the module has a good ground.

IMG 1914 336x252 Ford Focus / Fiesta Transmission Control Module TCU TCM Location Removal ReplacementIMG 1915 336x252 Ford Focus / Fiesta Transmission Control Module TCU TCM Location Removal Replacement