Don Ridley

Here's the electrical diagram. The wipers are controlled by signals on the medium speed LIN network (similar to Can bus). You may need a scanner to read status codes for the wipers. Forscan is an option. Otherwise, a trip to the dealer may be necessary. wiper motor.pdf

Yes and no.... Read the RS forum post. Then read some of the ST forum post (link in the RS post). Some have claimed it cured poor idle and other things. Some say it made no difference. But the ground is weak since it relies on bolt and nut thread contact only. Removing the paint probably is all that's necessary. No electrician would ever make a connection to a painted surface without removing the paint.

I removed the paint under the main ground lug and two other grounds under the air box. I added a 2ft ground cable from the main lug to an unused hole under the air box (similar to the Focus mods). I coated the bare metal with Corrosion X. The discussions about harmonics, inductance and ground loops missed the point that up to 100+ amps needs to flow though the lug and into the negative terminal of the battery. These mods ensure this can happen without any problems.

Nice work. Glad it was an easy fix once the problem was found.

There's a forum post about manuals from factory-manuals.com. I am using one. Here's another diagram.

Nevermind, they are separate units. APIM is item 12 in the diagram. You will need to load the apim Configuration file using Forscan if you replace the unit. Find an APIM from the same model year so the firmware matches your config file.

Try a Google search on the part number on the display unit. The photo is too blurry or I would do it. Maybe it is also the apim?

Yes. I am referencing Gen 2 TC to equivalent model year Focus.

I found this in the Focus RS forum. The TC has a painted ground connection like the Focus. I removed the paint with a sanding wheel on a Dremel to improve the connection. I used a jumper cable to maintain the ground connection during the procedure so none of the vehicle's memory would be lost. https://www.focusrs.org/threads/how-well-are-we-electrically-grounded.115556/ I will add some corrosion inhibitor later but it's not essential here in dry California. All the electricity flows through the ground bolt thread contact area. You can decide if corrosion of bare metal is more of a problem than a bolt thread-only ground connection.

I would get the hill assist not available message when there was a communication error on the high speed can bus. My error was caused by a obdII app trying to read some PCM data continuously. Maybe there is a communication problem? CEL and DTC codes should help.

Fifty, The trunk button on the fob will unlock a lift gate without making any sound. Try it. I thought mine was useless but it does unlock the door. This is because the "lock" is voltage from the BCM, not a mechanical latch changing position.

Forscan has only one version. It differs from other "apps" because it guarantees nothing and the user is 100% responsible for learning how to use it. It's a step above hacking. But, it can save the user hundreds of dollars and more importantly, it allows options and features a dealer won't implement.

You must have a PC (not Mac) to make any configuration changes using Forscan. The phone app can read data and reset CEL and DTCs only. https://forscan.org/forum/viewtopic.php?f=4&t=6142

You probably don't need an additional transmission cooler. As Fifty points out, this vehicle needs service. The existing cooling system should be adequate. You can read the transmission temperature with an obII device to verify. This may save time time and money.

The blank transponder keys (Gen 2) are easy to find on the internet for about $100. If you have both original keys you can easily program the vehicle to accept the new key(instructions in the owners manual). But I found out the hard way that getting the key cut to match the lock takes a special machine and my local locksmith charged $50. Probably cheaper than the dealer but $150 for a spare key sucks.

This post shows how to remove the door panels

The lock must be in the vehicle somewhere. Mine was in the glove box. Check the louvered panels in back. The dealers seem to be clueless about these. Here's info on how the dealer can but you a replacement. Need urgent help with security wheel nut removal https://www.focusrs.org/forum/showthread.php?t=119688

Fifty is 100% correct. Access to the inner mechanisms is not easy from my experience. But since I hate the hassle of dropping off and picking up cars from the dealer, I would try to repair this myself.

2014+ will be similar to a Focus of the same year. BUT, there are many, many differences also. Are you trying to modify a TC using Focus parts?

Removing the cover can be tough. Carefully pry with a tool that won't bend or mark the plastic. A firm tug will unclip it. The IPC connector self extracts by rotating the bracket on the plug.

Check a local salvage yard.

Welcome. The volume and utility of the SWB is underappreciated. Nice choice.

Here is the wiring for a 2016. The seatbelt is shown as a simple switch. Forscan has an option to turn off the passenger seat belt minder. I don't know if it works or if it applies to a 2019.

The wiring diagram will not show the circuit inside the module. It is impossible to determine the circuit by taking measurements with a voltmeter or any other device. I do not understand why you can't leave a seatbelt plugged in or simulate the connection. I have not looked at the seatbelts so I don't know how they signal the connection status. But I would try to determine what is needed to simulate the signal by taking the seatbelt switch apart. Buy a used seatbelt from a salvage yard to experiment with.

Yes, Forscan shows the option to enable/disable approach lights but my BCM calibration does not support this function.