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TPMS (TIS) sensors for trailer (SOLVED - see 1st post) aka TTPMS - Trailer TPMS

sstoner911 said:
This is a glitch that seems to plague people who install the TTPMS after the fact.

I have that same issue and reset the target pressure each time I tow. It doesn't seem to change while the trailer is connected, but once you unhook it reverts to 50psi.

You may also get "TRAILER SYSTEM NOT CONFIGURED". This seems to happen randomly and will sometimes correct itself. But if it doesn't when you go to tow, go in to the trailer settings and select a profile you are not using - make it the active trailer profile. Then go back to the profile you saved the TPMS setting son, make it active and you will be good to go.....another glitch in the Matrix for TTPMS installed after the fact.

I spoke to a MOPAR tech who said there maybe some updates, but since my truck did not have that option from the factory - I am not getting the updates. Trying to see how I can get those....if any...need to talk to my local dealer.
Click to expand...
Thanks
I will inquire about updates. If we can manage to get them, that might clear up some of the bs problems.
When the weak signal sends to the truck I see TTPMS on the dash cluster… but over on the big screen when it showed the trailer with the axle/tire configuration it never shows any numbers there.. not sure what.

I’m sure the guys that ORDER a 2024-2025 truck WITH this TTPMS feature the get some literature with instructions.
 
AFTERMARKET TPMS BOOSTER ?
A friend sent me a link to a TPMS BOOSTER module that is sold on Amazon.
Has anyone ever tried one of these?
I need to find a way to achieve a better, stronger, reliable signal from the trailer axles that are pretty far back from the truck on a 40ft gooseneck traiker.

I took a 12 hour road trip July 2nd and the readings were sporadic at best.
The right side outside two tires had the hardest time getting signal. I think that’s possibly because of the detail of mounting location of the bumper sensor being just left of center if you’re looking at the plate from the back of the truck.

Anyway… SIGNAL BOOSTERS are out there but has anyone attempted the use of one ?

Thanks guys !!!
For doing what RAM should of done in the first place before releasing such a feature.
 
Here is a LINK to the signal booster 433.92MHZ
NOTE: I have not tried this as of yet. I’m hoping to find someone that has tried it that would share their experience good or bad with the rest of us.

Thanks,
Ronald Self
 
ghaynes754 said:
Has anyone bought/installed the tire pressure sensors on a towed trailer that can be viewed on the driver information center after being configured in the UConnect? Specifically for the 3500. I am looking for the part number for the sensor.

I've tried a couple of dealers and yesterday chatted and then emailed Mopar support. Chat referred me to email. Email sent me a totally useless reply. "After doing some research, I found that I only have part information for those that come equipped with a particular vehicle or that are compatible with a vehicle. I would suggest that you speak with an authorized Ram dealer for the part number for the Tire Pressure Sensors that would be used by the trailer towed by your truck. "

This being my first non GM truck after 40 years I am surprised that FCA support doesn't have part numbers. Seems like a black hole.


Mod [Brutal_HO] Edit: OP hasn't been seen in a while so I'm posting a summary update here regarding the TTPMS (Trailer TPMS):

Through diligence and hard work on the part of several members, the parts and process to add TTPMS has been discovered. There are several good summaries and instructions posted throughout the thread that I will attempt to cover below.

The parts required, discovered by several contributors and posted throughout the thread, was initially summarized by @thestuarts HERE.

PARTS REQUIRED TO ADD TTPMS to 2019+ RAM HD TRUCKS:
As of 6-21-20 You may find some of these parts, particularly the TIM module and jumper cable, currently out of stock everywhere, partly thanks to this thread.​

You will need to install the hard parts. @Phil T excellent instructions pdf HERE.

The hardest part of this is pulling down the headliner (easier on 2020) to remove a dummy plug jumper and install the TIM and jumper cable.

TIM and jumper location: (photo credit to @Phil T)

View attachment 58792

TOOLS REQUIRED:
  • AlfaOBD for Windows or Android (2020 trucks) ($50) (50% discount on the second license)
  • Security bypass cable like the one from KAOdTECH. ($50) or Jimmy ($?)
  • Bluetooth OBD-II adapter like the OBDLink MX/MX+ ($80/$120) or Vgate vLinker MC+ Bluetooth ($60) or OBD USB cable

You will need to enable the sales code option for TTPMS using the tools and components listed to "recode" the Body Control Module (BCM). There's a giant AlphOBD thread here if needing a primer. I used an ELM327 compatible OBD2 reader ($22 BAFX) with success but don't recommend these in general as they won't be able to perform all AlfaOBD functions.

Turning on the TTPMS option in the EVIC discovered HERE thanks to @g00fy

VehConfig 8: Trailer TPM

1589229719213.png



For the 2019 trucks, you may need to use the Windows version and select the MY2020 under advanced - also thanks to @g00fy
(ETA: AlphaOBD has been updated to include MY2019 TTPMS settings and the ability to override the BCM MY in the Android version as well as Windows)

An excellent writeup using AlphaOBD Windows for a 2019 written by @Phil T HERE

"The TTPM sends the information to the TIM via the Controller Area Network-Chassis (CAN-C) to be transmitted to the IPC."

ETA: P/T Chassis Net: TTPM must be enabled.

It may take several key cycles or time, or even overnight for the Tire Pressure options to show up in the U-Connect Trailer Settings once TTPMS is enabled.

@1FastHemi excellent post on adding the wheel sensors HERE:

I was unable to pair non-MOPAR sensors (external TireMinder) to the system. I don't believe anyone has been successful pairing non-MOPAR sensors.

Lastly, much of this could not have been possible without guidance and input and PARTS from @Jimmy07
Click to expand...
Does anyone have a video showing or detailed instructions on how to gain access to the rear wall behind passenger rear seat for gaining access to where the TTPMS gateway module is supposed to be installed? I created a new post that consolidates a lot of the information across many many pages of different threads for the installation of the TTPMS and Trailer Surround View systems. This post can be found here:

daveemarcus

Thread 'Guide / Request for Help – Trailer TPMS & Trailer Surround View Retrofit (2024 RAM 2500)'

Hi Everyone,

First off, I want to thank this community. There is a wealth of information here, and I’ve learned a ton already. That said, with so many threads spanning multiple model years, it’s been difficult to track down what specifically applies to the 2024 RAM HD trucks. My goal here is to consolidate what I’ve researched so far and to ask for help filling in the gaps — both for my own install and hopefully for others attempting the same retrofit.

I’m maintaining this guide as a document, but I also hope to make a YouTube walkthrough once I start the install. Collaboration is...

I would greatly appreciate someone making a video on how to "easily" gain access to this panel, especially if they have a 2024 Ram 2500 Mega Cab. I plan on making videos for the installation of the TTPMS and Trailer Surround View systems when I receive the equipment.
 
daveemarcus said:
Does anyone have a video showing or detailed instructions on how to gain access to the rear wall behind passenger rear seat for gaining access to where the TTPMS gateway module is supposed to be installed? I created a new post that consolidates a lot of the information across many many pages of different threads for the installation of the TTPMS and Trailer Surround View systems. This post can be found here:

daveemarcus

Thread 'Guide / Request for Help – Trailer TPMS & Trailer Surround View Retrofit (2024 RAM 2500)'

Hi Everyone,

First off, I want to thank this community. There is a wealth of information here, and I’ve learned a ton already. That said, with so many threads spanning multiple model years, it’s been difficult to track down what specifically applies to the 2024 RAM HD trucks. My goal here is to consolidate what I’ve researched so far and to ask for help filling in the gaps — both for my own install and hopefully for others attempting the same retrofit.

I’m maintaining this guide as a document, but I also hope to make a YouTube walkthrough once I start the install. Collaboration is...

I would greatly appreciate someone making a video on how to "easily" gain access to this panel, especially if they have a 2024 Ram 2500 Mega Cab. I plan on making videos for the installation of the TTPMS and Trailer Surround View systems when I receive the equipment.
Click to expand...

The module for the heavy duty trucks is located above the rear window under the headliner. You will need to remove the torx screw for the shirt hanger and one screw in the rear pillar and you should be able to get the connector and where it mounts. Tons of videos on YouTube on how to drop the headliner.
 
sstoner911 said:
The module for the heavy duty trucks is located above the rear window under the headliner. You will need to remove the torx screw for the shirt hanger and one screw in the rear pillar and you should be able to get the connector and where it mounts. Tons of videos on YouTube on how to drop the headliner.
Click to expand...
I really appreciate your reply! You are absolutely right. It definitely helps when you search for the right terms, which I definitely wasn't doing. Thank you for pointing me in the right direction!
 
MrRogue1 said:
Here is a LINK to the signal booster 433.92MHZ
NOTE: I have not tried this as of yet. I’m hoping to find someone that has tried it that would share their experience good or bad with the rest of us.

Thanks,
Ronald Self
Click to expand...
I tried this and it didn't work. Got my money back.

R.K.
 
sstoner911 said:
This is a glitch that seems to plague people who install the TTPMS after the fact.

I have that same issue and reset the target pressure each time I tow. It doesn't seem to change while the trailer is connected, but once you unhook it reverts to 50psi.

You may also get "TRAILER SYSTEM NOT CONFIGURED". This seems to happen randomly and will sometimes correct itself. But if it doesn't when you go to tow, go in to the trailer settings and select a profile you are not using - make it the active trailer profile. Then go back to the profile you saved the TPMS setting son, make it active and you will be good to go.....another glitch in the Matrix for TTPMS installed after the fact.

I spoke to a MOPAR tech who said there maybe some updates, but since my truck did not have that option from the factory - I am not getting the updates. Trying to see how I can get those....if any...need to talk to my local dealer.
Click to expand...
 
I have a 2025 3500 I bought with factory installed TTPMS. I have the issue with not being able to pair the rear axle on a triple axle 42’ fifth wheel, as well as the issue with tire pressure targets resetting each time I connect and disconnect other trailers. Moving the module onto the trailer with an extension cable is not an option for me as we have four trailers.

I bought this truck as a hedge against my F450 that’s been on order for 5 months. Ford is smart enough to offer repeaters. Does Ram really not have a solution for this? The truck is rated to tow 36,600lbs. I don’t many trailers that heavy with rear axles closer than 32’ from the back of the truck. This seems like a fundamental engineering failure. I’m a robust Ram fan (I also have a 2019 2500, and have had multiple other 2500s and 1500s) and this has me pissed off having spent $90k on this truck.
 
MavRacer07 said:
I have a 2025 3500 I bought with factory installed TTPMS. I have the issue with not being able to pair the rear axle on a triple axle 42’ fifth wheel, as well as the issue with tire pressure targets resetting each time I connect and disconnect other trailers. Moving the module onto the trailer with an extension cable is not an option for me as we have four trailers.

I bought this truck as a hedge against my F450 that’s been on order for 5 months. Ford is smart enough to offer repeaters. Does Ram really not have a solution for this? The truck is rated to tow 36,600lbs. I don’t many trailers that heavy with rear axles closer than 32’ from the back of the truck. This seems like a fundamental engineering failure. I’m a robust Ram fan (I also have a 2019 2500, and have had multiple other 2500s and 1500s) and this has me pissed off having spent $90k on this truck.
Click to expand...
I have been pissed off since 2021. Ram has known about the problem for four years and had chosen not to do anything about it.
 
MavRacer07 said:
I have a 2025 3500 I bought with factory installed TTPMS. I have the issue with not being able to pair the rear axle on a triple axle 42’ fifth wheel, as well as the issue with tire pressure targets resetting each time I connect and disconnect other trailers. Moving the module onto the trailer with an extension cable is not an option for me as we have four trailers.

I bought this truck as a hedge against my F450 that’s been on order for 5 months. Ford is smart enough to offer repeaters. Does Ram really not have a solution for this? The truck is rated to tow 36,600lbs. I don’t many trailers that heavy with rear axles closer than 32’ from the back of the truck. This seems like a fundamental engineering failure. I’m a robust Ram fan (I also have a 2019 2500, and have had multiple other 2500s and 1500s) and this has me pissed off having spent $90k on this truck.
Click to expand...
If you guys are looking for a signal booster for the TTPMS, you are probably going to have to find one that covers the 315MHz signal as well, or design one. A lot of those Amazon signal boosters only cover 433MHz. The other thing that’s possible is that the signal booster is possibly saturating the signal at the receiver, which is on the bumper of the truck. If you have a signal booster, and the TTPMS isn’t reading properly, try moving the signal boaster away from the truck and actually closer to the trailer axles. This will provide a stronger signal at the source since the actual signals in the tires are probably very low. A little counterintuitive, but may work. Good luck!
 
Last edited:
As a follow-up to my pervious post on page 77 regarding aftermarket tire pressure sensors, here is what I found:

It took some digging, but I was successful in getting aftermarket sensors to work on my trailers!! As I stated before, I have an Autel MaxiTPMS TS508 scanner/programmer. There was much trial and error to figure out what was going on. As I stated previously, I could not get the Autel MX Sensors to work on other MOPAR vehicles without actually cloning the factory sensors. I believe Autel's software loaded in these units is faulty, or at least coded incorrectly.

One of the latest updates to my TS508 has added trailer tire monitor coding/programming to Ford, GM, Ram, and others. As to Ram coding, using their software to code the MX Sensors DOES NOT WORK.

I purchased a couple sets of genuine MOPAR TTMS kits- part # 68600218AA. These kits were confirmed by my local dealer to be compatible with my '24 Rebel 2500. I started by cloning one of these sets into a set of Autel MX Sensors with the standard rubber valve stems. Using the scanner to "trigger" the cloned/coded sensors also DOES NOT WORK!! You MUST do as instructed on the dash of your truck and DEFLATE each tire 5psi+ in sequence! I believe this is because the tires are too close together when set up as tandems or duals on a trailer. (Triggering works on non-dual vehicles because of the spacing between the wheels)

With the cloned sensors, the Autel MX Sensors worked perfectly! I called Autel directly and inquired about the signal output strength and maximum pressure reading of these units, and also if trailer specific units had a higher signal output. The guy I got on the phone was quite courteous and knowledgeable, but of course told me I was delving into specifics only an engineer could answer... The packaging says they have the "maximum signal strength", which is controlled by the FCC I believe. There are FCC ID numbers on all these units.

So, to figure out what was so special about the factory units was where I had to dig deep into the coding. All TPMS sensors have what is known as a hexadecimal code written into the transmitter. This code is what allows a vehicle to only read signals from the transmitters on it's own wheels vs. all the units within a reasonable distance (i.e. sitting at a traffic light). This hexadecimal code is made of seven digits in any combination of 0 through 9 and A through F. The transmitted signal contains tire pressure, temperature, battery condition, manufacturer, and the serial code.

I have narrowed it down to the Ram TTPMS monitoring system (at least on my '24) looking for the sensors to have the FIRST 3 DIGITS of "612" in the hexadecimal series. The TS 508 allows the user to manually enter any hexadecimal code into the MX Sensors. I was able to start a series of codes with the "612" prefix and make up my own last 4 digits (i.e. 0001, 0002, 0003, etc.). BINGO!!!

So, I am no longer at the mercy of MOPAR for trailer tire pressure monitors, at roughly +/- $235 per set, or about $60ea! And this is an online price, not what the dealer is going to ask at the counter!! Also, these factory units are extremely long in the stem! I purchased a bulk box of 20 units of the standard rubber valve stem Autel MX Sensors for $15ea. on Amazon. About as much as a set of 4 factory MOPAR ones from your dealer parts counter...

I'm sorry for taking so long to add to my "discovery" of the aftermarket trick. It seems too good to be true. I wanted to thoroughly test these before posting this. I have towed both my ATV trailer and my 5th wheel toy hauler quite some miles over the summer and have had no instances with these Autel sensors. They work flawlessly!

I know there is a lot of people that have trouble with monitors " signal dropping" on long wb trailers. As I stated, I believe there is no "holy grail" as to the strength of the monitors. My ATV trailer is about 20' from the furthest wheels to the ball, and my toy hauler is about 25' from the furthest wheels to the king pin (I know they're short- don't judge me, lol!)

Hopefully this will help people save some money on monitors, especially if you have several trailers or a working fleet. I used this forum for setting up my Rebel with the monitoring system. This knowledge is INVALUABLE!! This is something that would have also been impossible at my dealership. Just trying to give back to this amazing community! I'll be selling the 2 sets of factory units now- still in the packaging...
 
RodS said:
As a follow-up to my pervious post on page 77 regarding aftermarket tire pressure sensors, here is what I found:

It took some digging, but I was successful in getting aftermarket sensors to work on my trailers!! As I stated before, I have an Autel MaxiTPMS TS508 scanner/programmer. There was much trial and error to figure out what was going on. As I stated previously, I could not get the Autel MX Sensors to work on other MOPAR vehicles without actually cloning the factory sensors. I believe Autel's software loaded in these units is faulty, or at least coded incorrectly.

One of the latest updates to my TS508 has added trailer tire monitor coding/programming to Ford, GM, Ram, and others. As to Ram coding, using their software to code the MX Sensors DOES NOT WORK.

I purchased a couple sets of genuine MOPAR TTMS kits- part # 68600218AA. These kits were confirmed by my local dealer to be compatible with my '24 Rebel 2500. I started by cloning one of these sets into a set of Autel MX Sensors with the standard rubber valve stems. Using the scanner to "trigger" the cloned/coded sensors also DOES NOT WORK!! You MUST do as instructed on the dash of your truck and DEFLATE each tire 5psi+ in sequence! I believe this is because the tires are too close together when set up as tandems or duals on a trailer. (Triggering works on non-dual vehicles because of the spacing between the wheels)

With the cloned sensors, the Autel MX Sensors worked perfectly! I called Autel directly and inquired about the signal output strength and maximum pressure reading of these units, and also if trailer specific units had a higher signal output. The guy I got on the phone was quite courteous and knowledgeable, but of course told me I was delving into specifics only an engineer could answer... The packaging says they have the "maximum signal strength", which is controlled by the FCC I believe. There are FCC ID numbers on all these units.

So, to figure out what was so special about the factory units was where I had to dig deep into the coding. All TPMS sensors have what is known as a hexadecimal code written into the transmitter. This code is what allows a vehicle to only read signals from the transmitters on it's own wheels vs. all the units within a reasonable distance (i.e. sitting at a traffic light). This hexadecimal code is made of seven digits in any combination of 0 through 9 and A through F. The transmitted signal contains tire pressure, temperature, battery condition, manufacturer, and the serial code.

I have narrowed it down to the Ram TTPMS monitoring system (at least on my '24) looking for the sensors to have the FIRST 3 DIGITS of "612" in the hexadecimal series. The TS 508 allows the user to manually enter any hexadecimal code into the MX Sensors. I was able to start a series of codes with the "612" prefix and make up my own last 4 digits (i.e. 0001, 0002, 0003, etc.). BINGO!!!

So, I am no longer at the mercy of MOPAR for trailer tire pressure monitors, at roughly +/- $235 per set, or about $60ea! And this is an online price, not what the dealer is going to ask at the counter!! Also, these factory units are extremely long in the stem! I purchased a bulk box of 20 units of the standard rubber valve stem Autel MX Sensors for $15ea. on Amazon. About as much as a set of 4 factory MOPAR ones from your dealer parts counter...

I'm sorry for taking so long to add to my "discovery" of the aftermarket trick. It seems too good to be true. I wanted to thoroughly test these before posting this. I have towed both my ATV trailer and my 5th wheel toy hauler quite some miles over the summer and have had no instances with these Autel sensors. They work flawlessly!

I know there is a lot of people that have trouble with monitors " signal dropping" on long wb trailers. As I stated, I believe there is no "holy grail" as to the strength of the monitors. My ATV trailer is about 20' from the furthest wheels to the ball, and my toy hauler is about 25' from the furthest wheels to the king pin (I know they're short- don't judge me, lol!)

Hopefully this will help people save some money on monitors, especially if you have several trailers or a working fleet. I used this forum for setting up my Rebel with the monitoring system. This knowledge is INVALUABLE!! This is something that would have also been impossible at my dealership. Just trying to give back to this amazing community! I'll be selling the 2 sets of factory units now- still in the packaging...
Click to expand...
Good to know. 2021 I think was the first year for TTPMS and I struggled for two years getting the darn things to work. Finally endedup attaching the back bumper receiver to the trailer belly near the axles with a long extension cable to finally getting a good signal from all the tires (duals). I have the TS508 tool which now reads the trailer sensors. Hopefully won't have to replace the factory ones any time soon. Ram makes this stuff way too difficult.
 
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