1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

2018-2021 Tundra adding 5th (Spare) Tire to Instrument Cluster Display

Discussion in '2.5 Gen Tundras (2014-2021)' started by Jeff_5_7, Sep 21, 2023.

  1. Sep 21, 2023 at 4:52 PM
    #1
    Jeff_5_7

    Jeff_5_7 [OP] New Member

    Joined:
    Feb 20, 2021
    Member:
    #59378
    Messages:
    1,407
    Gender:
    Male
    First Name:
    Jeff
    Houston Tx Area
    Vehicle:
    2007 RCSB 2014+ TRD Pro Conversion 5.7 4x4
    Full 2014+ Conversion Regular Cab Short Bed 4X4 2019 TRD Pro Grill, 2014+ Front End Swap 2014+ Interior/Dash Swap with TRD Pro Leather Seats, 2014+ Bed Swap with TRD Pro Stamping SOS 2/4 Drop Kit
    Thanks to @azTony we just reprogrammed his TPMS ecu to add the spare tire and show 5 tires on the display.

    I posted a thread long ago where I discovered I could display a 5th tire pressure on the cluster screen by sending it specially formatted CAN messages. See more here: https://www.tundras.com/threads/2018-tpms-codes-finally-cracked.105009/

    The Tundra TPMS ecus has the ability to store sensor IDs for one main set of tires, up to 5 total including the spare. From the factory the ECU is set for only 4 tires however, leaving the spare out. Unfortunately, Techstream has no option to change the TPMS ecu from 4 to 5 tires. I spent the last several weeks testing my benchtop TPMS ecu and now have a way to reprogram it to 5 tires. We just tested it on Tonys 2018 Tundra with success.

    upload_2023-9-21_18-38-16.png

    If any other members are interested I can do this for you also for a small fee.

    A few things you will need.
    1) A 5th TPMS sensor installed in your spare tire. (Can be added in afterward)
    2) The ID of the 5th Sensor (Can be added in afterward)
    3) Any ELM327 OBD adapter (Tony and I used the Veepeak via bluetooth)
    4) The free windows software "Real Dash" from the Microsoft app store. Its free and has a great interface to communicate with the ECUs of the truck.
    5) A Windows laptop that can connect to the ELM327 device and run Google Chrome Remote Desktop.
    6) Toyota Techstream software, IF you want to register your new ID and set it to the spare location at the same time. I assume any tire shop can do this for you also, or the Autel units people use.

    Tony shared his screen with me remotely and I used the software on his laptop to communicate with his truck via ELM327 to reprogram the ECU to 5 tires. Afterward he used Techstream to enter the 5th sensor ID and set it to the Spare location at the same time. I assume the display will show the spare as --- until you set the new ID and location to Spare with Techstream.

    The TPMS ecu will stay set to 5 tires forever unless someone reprograms it back to 4 or the ecu is removed and replaced. The new sensor can be added anytime afterward, the display will not show the actual number until the new sensor is added and registered.

    Fee is $50 and I will set aside an agreed upon window of 30 mins to work with you. This is less than what I charge for a half hour of my time as an engineer, and less than what the stealer ship will charge to tell you that they can not do it. Also I have years of time invested into working with and understanding communication with these ECUS. I cant just do it for free, my time is worth something.
    If it cant be done remotely, removing the ECU and shipping it is an option, but you will probably spend most of that $50 in shipping fees back and forth to me.

    The remote option with an ELM327 OBD device is easier for you and I both.

    I am really excited to see this finally working. I personally think it is really cool.
     
    Last edited: Sep 21, 2023
  2. Sep 21, 2023 at 5:01 PM
    #2
    coTony

    coTony member since sept, 2017 and a BUNCH of messages

    Joined:
    Sep 16, 2017
    Member:
    #9693
    Messages:
    3,116
    Gender:
    Male
    First Name:
    Tony
    Sun Lakes, AZ
    Vehicle:
    *** OV Tune Order #4481 *** ECU 0CN21 ***
    2018 Tundra Platinum with Icon Stage 9 w/3.0 and billet UCA, Harrop Elockers, 5.29 on 37’s
    I just want to give a HUGE shout out to Da Man @Jeff_5_7 for using a 2018 setup for his testing. I have been looking all over trying to figure out how to change that one number in Techstream and that was the magic. Time well spent my friend and sorry about the slow Toughbook, it came through in the end!
     
  3. Sep 21, 2023 at 5:29 PM
    #3
    TRDFerguson

    TRDFerguson SSEM #99/RGBA #8-ish?/It’s a funny name.

    Joined:
    Oct 18, 2018
    Member:
    #20730
    Messages:
    9,968
    Gender:
    Male
    First Name:
    Jake
    Southeast Greater Basin, AZ
    Vehicle:
    2018 MGM CrüeMax
    Well I got excited for a cool DIY to try, then I saw you’re only offering it as a service… good on ya, but I’d suggest moving this to the marketplace if that’s the case.
     
    Jeff_5_7[OP] likes this.
  4. Sep 21, 2023 at 5:56 PM
    #4
    Jeff_5_7

    Jeff_5_7 [OP] New Member

    Joined:
    Feb 20, 2021
    Member:
    #59378
    Messages:
    1,407
    Gender:
    Male
    First Name:
    Jeff
    Houston Tx Area
    Vehicle:
    2007 RCSB 2014+ TRD Pro Conversion 5.7 4x4
    Full 2014+ Conversion Regular Cab Short Bed 4X4 2019 TRD Pro Grill, 2014+ Front End Swap 2014+ Interior/Dash Swap with TRD Pro Leather Seats, 2014+ Bed Swap with TRD Pro Stamping SOS 2/4 Drop Kit
    Good point… didn’t think about that.

    DIY lead to Pandora’s box for me but I think I owe you a favor for some 2018 Tundra CAN logs. Feel free to shoot me a message.
     
  5. Sep 21, 2023 at 7:12 PM
    #5
    TRDFerguson

    TRDFerguson SSEM #99/RGBA #8-ish?/It’s a funny name.

    Joined:
    Oct 18, 2018
    Member:
    #20730
    Messages:
    9,968
    Gender:
    Male
    First Name:
    Jake
    Southeast Greater Basin, AZ
    Vehicle:
    2018 MGM CrüeMax
    Haha you don’t owe me anything. It was cool to help out on that end.

    This isn’t something that I have to have, but it’s pretty cool and I’m curious.
     
    RainMan_PNW likes this.
  6. Sep 21, 2023 at 7:53 PM
    #6
    Tundra234

    Tundra234 New Member

    Joined:
    Nov 30, 2018
    Member:
    #22402
    Messages:
    17,189
    Gender:
    Male
    First Name:
    George
    Florida
    Vehicle:
    2020 Tundra DC SR5 Barcelona
    Alot of them
    :popcorn: Following this. Definitely cool and useful. I may have to add this to my to do list. Good job @Jeff_5_7
     
    Jeff_5_7[OP] likes this.
  7. Sep 21, 2023 at 7:58 PM
    #7
    RainMan_PNW

    RainMan_PNW SSEM #82 RGBA #4 “That Guy” Vendor?

    Joined:
    Oct 27, 2020
    Member:
    #54134
    Messages:
    15,636
    Gender:
    Male
    First Name:
    Casey
    Clark County, WA
    Vehicle:
    2021 Lunar Rock TRD Pro CM
    Check the build link in my signature.
    So, this is NOT in the EEPROM in the instrument cluster, correct?
     
    ryanwgregg and Jeff_5_7[OP] like this.
  8. Sep 21, 2023 at 8:09 PM
    #8
    Jeff_5_7

    Jeff_5_7 [OP] New Member

    Joined:
    Feb 20, 2021
    Member:
    #59378
    Messages:
    1,407
    Gender:
    Male
    First Name:
    Jeff
    Houston Tx Area
    Vehicle:
    2007 RCSB 2014+ TRD Pro Conversion 5.7 4x4
    Full 2014+ Conversion Regular Cab Short Bed 4X4 2019 TRD Pro Grill, 2014+ Front End Swap 2014+ Interior/Dash Swap with TRD Pro Leather Seats, 2014+ Bed Swap with TRD Pro Stamping SOS 2/4 Drop Kit
    Correct, it is however in the EEPROM of the TPMS ecu, I know that because the ecu never forgets the setting when power is completely removed. It just tells the ecu to recognize 5 tires instead of the factory 4.

    When you tell it to work with 5 tires it then relays data for the 5 to the cluster instead of sending data for only 4. This gives you 5 readings on screen instead of 4.

    I assume Toyota didn’t want to pay to put a 5th sensor in every truck at the factory so they just told the Ecu to only work with 4
     
    ryanwgregg, bulldog93 and TRDFerguson like this.
  9. Sep 21, 2023 at 8:19 PM
    #9
    RainMan_PNW

    RainMan_PNW SSEM #82 RGBA #4 “That Guy” Vendor?

    Joined:
    Oct 27, 2020
    Member:
    #54134
    Messages:
    15,636
    Gender:
    Male
    First Name:
    Casey
    Clark County, WA
    Vehicle:
    2021 Lunar Rock TRD Pro CM
    Check the build link in my signature.
    Got it
    You helped me get set up flashing the instrument cluster for ODO when we were digging into the parking sonar (much appreciated again). Just wanted to be sure this wasn’t something I could do through that.
     
    ryanwgregg likes this.
  10. Sep 21, 2023 at 8:23 PM
    #10
    Jeff_5_7

    Jeff_5_7 [OP] New Member

    Joined:
    Feb 20, 2021
    Member:
    #59378
    Messages:
    1,407
    Gender:
    Male
    First Name:
    Jeff
    Houston Tx Area
    Vehicle:
    2007 RCSB 2014+ TRD Pro Conversion 5.7 4x4
    Full 2014+ Conversion Regular Cab Short Bed 4X4 2019 TRD Pro Grill, 2014+ Front End Swap 2014+ Interior/Dash Swap with TRD Pro Leather Seats, 2014+ Bed Swap with TRD Pro Stamping SOS 2/4 Drop Kit
    No completely different ECU, but you got me thinking maybe either in cluster or TPMS Ecu a setting exist to disable the warning light completely. I know alot of 2007-2017 guys just want the little orange light gone for good.
     
    Last edited: Oct 5, 2023
  11. Sep 22, 2023 at 6:15 AM
    #11
    coTony

    coTony member since sept, 2017 and a BUNCH of messages

    Joined:
    Sep 16, 2017
    Member:
    #9693
    Messages:
    3,116
    Gender:
    Male
    First Name:
    Tony
    Sun Lakes, AZ
    Vehicle:
    *** OV Tune Order #4481 *** ECU 0CN21 ***
    2018 Tundra Platinum with Icon Stage 9 w/3.0 and billet UCA, Harrop Elockers, 5.29 on 37’s
    That orange light has never bothered me, it does it's job when required and only then
     
    Tundra234 likes this.
  12. Sep 25, 2023 at 9:09 AM
    #12
    Reddawg1100

    Reddawg1100 New Member

    Joined:
    Aug 4, 2023
    Member:
    #101474
    Messages:
    180
    FL
    Vehicle:
    21 SR5 Midnight Black DC, AKA: Bat Truck
    Custom rims, front leveling spacers
    Does anyone have a recommendation on which brand TPMS sensor to use? I tried searching spark parts and came up empty on a stock unit.
     
  13. Sep 25, 2023 at 9:28 AM
    #13
    RainMan_PNW

    RainMan_PNW SSEM #82 RGBA #4 “That Guy” Vendor?

    Joined:
    Oct 27, 2020
    Member:
    #54134
    Messages:
    15,636
    Gender:
    Male
    First Name:
    Casey
    Clark County, WA
    Vehicle:
    2021 Lunar Rock TRD Pro CM
    Check the build link in my signature.
    I would just hit the local tire shop and get one that's compatible
     
  14. Sep 25, 2023 at 10:13 AM
    #14
    Tundra234

    Tundra234 New Member

    Joined:
    Nov 30, 2018
    Member:
    #22402
    Messages:
    17,189
    Gender:
    Male
    First Name:
    George
    Florida
    Vehicle:
    2020 Tundra DC SR5 Barcelona
    Alot of them
    The 20/21 needs the OEM sensors as does not like aftermarket. Let me find the part number.
     
    ryanwgregg and bulldog93 like this.
  15. Sep 25, 2023 at 10:15 AM
    #15
    Tundra234

    Tundra234 New Member

    Joined:
    Nov 30, 2018
    Member:
    #22402
    Messages:
    17,189
    Gender:
    Male
    First Name:
    George
    Florida
    Vehicle:
    2020 Tundra DC SR5 Barcelona
    Alot of them
    42607-0C091
     
  16. Sep 25, 2023 at 10:35 AM
    #16
    Reddawg1100

    Reddawg1100 New Member

    Joined:
    Aug 4, 2023
    Member:
    #101474
    Messages:
    180
    FL
    Vehicle:
    21 SR5 Midnight Black DC, AKA: Bat Truck
    Custom rims, front leveling spacers
    Fantastic, thanks @Tundra234
     
    ryanwgregg and Tundra234[QUOTED] like this.
  17. Sep 25, 2023 at 12:27 PM
    #17
    Jeff_5_7

    Jeff_5_7 [OP] New Member

    Joined:
    Feb 20, 2021
    Member:
    #59378
    Messages:
    1,407
    Gender:
    Male
    First Name:
    Jeff
    Houston Tx Area
    Vehicle:
    2007 RCSB 2014+ TRD Pro Conversion 5.7 4x4
    Full 2014+ Conversion Regular Cab Short Bed 4X4 2019 TRD Pro Grill, 2014+ Front End Swap 2014+ Interior/Dash Swap with TRD Pro Leather Seats, 2014+ Bed Swap with TRD Pro Stamping SOS 2/4 Drop Kit
    I should add, I think some people have mention they had a sensor in the spare from Toyota factory.

    I am not sure if this is true or not or how to check if one was installed at the factory however. Maybe by looking in Techstream.
     
  18. Sep 25, 2023 at 3:48 PM
    #18
    coTony

    coTony member since sept, 2017 and a BUNCH of messages

    Joined:
    Sep 16, 2017
    Member:
    #9693
    Messages:
    3,116
    Gender:
    Male
    First Name:
    Tony
    Sun Lakes, AZ
    Vehicle:
    *** OV Tune Order #4481 *** ECU 0CN21 ***
    2018 Tundra Platinum with Icon Stage 9 w/3.0 and billet UCA, Harrop Elockers, 5.29 on 37’s
    I have never seen or heard of anyone that had one in the factory spare. If you look in Techstream and can see the 5th TPMS then it would show on the dash from what we went through. There was no way for me to register 5 ID's only 4 because that is the tire count stored in Techstream and from I have found there is no way to update that one field from a 4 to a 5. Once that was changed to a 5 the 5th tire shows up but without a registered TPMS sensor there is no way to get a reading. All 5 TPMS's need to be registered to receive a reading of all 5.

    You can go to a place like Discount Tire and ask them to do it for you. I doubt they would if you walked in and never been there as a customer before because they did not want to to it for me. I was pretty pressing on the guy and he went and got a manager. We talked through it and he said it would only take a minute to scan the spare. We walked out and the kid seen my tire in the bed strapped down and said that would have to come out of the bed so he can scan it. I was standing on the tailgate and he was in front of me and he laid the scanner down. I had it scanned in a couple secs. I took a picture of the screen for the ID and handed him the scanner. No words were said as we parted. Some peoples kids...
     
  19. Oct 5, 2023 at 3:01 PM
    #19
    Chad D.

    Chad D. New Member

    Joined:
    Feb 12, 2019
    Member:
    #26010
    Messages:
    1,262
    Gender:
    Male
    Western Oregon
    Vehicle:
    2018 CrewMax Platinum
    This is exactly what I’ve been waiting for!

    I will be getting my ducks in a row with the parts and pieces necessary on my end, and get in line for a remote tuning session.

    Thanks for figuring this out!
     
    coTony, Tundra234 and bulldog93 like this.
  20. Oct 16, 2023 at 2:08 PM
    #20
    cavalry bear

    cavalry bear New Member

    Joined:
    Aug 2, 2019
    Member:
    #34051
    Messages:
    15
    Gender:
    Male
    First Name:
    Cavalry
    Vehicle:
    2019 Limited Tundra
    None Yet
    Wow, this is slick. Well done sir.
     
    coTony likes this.
  21. Oct 28, 2023 at 5:17 PM
    #21
    anh6259

    anh6259 New Member

    Joined:
    Aug 16, 2020
    Member:
    #50876
    Messages:
    13
    Jeff,

    What OBDII cable do you guys use? I also poke around in techstream under TPMS and found an option to switch from 4 tires to 5 tires but unable to get it to switch. It kept on saying lost connection. I can switch TPMS IDs around but unable to register new ones or switch from 4 to 5 tires.

    Thank you
     
    bulldog93 likes this.
  22. Oct 28, 2023 at 5:27 PM
    #22
    Jeff_5_7

    Jeff_5_7 [OP] New Member

    Joined:
    Feb 20, 2021
    Member:
    #59378
    Messages:
    1,407
    Gender:
    Male
    First Name:
    Jeff
    Houston Tx Area
    Vehicle:
    2007 RCSB 2014+ TRD Pro Conversion 5.7 4x4
    Full 2014+ Conversion Regular Cab Short Bed 4X4 2019 TRD Pro Grill, 2014+ Front End Swap 2014+ Interior/Dash Swap with TRD Pro Leather Seats, 2014+ Bed Swap with TRD Pro Stamping SOS 2/4 Drop Kit
    We did Tony’s wireless with a Bluetooth ELM device. The cable is not near as important as the communication protocol. I checked several different times in Techstream under Tundras and never saw an option to switch from 4 to 5 tires. Where did you find it?

    Maybe Techstream is sending data on a protocol not supported by your truck?
     
    bulldog93 likes this.
  23. Oct 28, 2023 at 7:31 PM
    #23
    anh6259

    anh6259 New Member

    Joined:
    Aug 16, 2020
    Member:
    #50876
    Messages:
    13
    It should be listed under ID Registration/Tire Position Write. I attached pictures of what I found on techstream. Are you using the latest version?

    20231028_132815.jpg
    20231028_133504.jpg

    20231028_201904.jpg
     
    bulldog93 likes this.
  24. Oct 29, 2023 at 6:51 AM
    #24
    Jeff_5_7

    Jeff_5_7 [OP] New Member

    Joined:
    Feb 20, 2021
    Member:
    #59378
    Messages:
    1,407
    Gender:
    Male
    First Name:
    Jeff
    Houston Tx Area
    Vehicle:
    2007 RCSB 2014+ TRD Pro Conversion 5.7 4x4
    Full 2014+ Conversion Regular Cab Short Bed 4X4 2019 TRD Pro Grill, 2014+ Front End Swap 2014+ Interior/Dash Swap with TRD Pro Leather Seats, 2014+ Bed Swap with TRD Pro Stamping SOS 2/4 Drop Kit
    In all my testing that function is for setting the IDs for all 4 or 5 tires, but that’s the second step in the process. The first is the function to set the TPMS ecu from 4 to 5 tires which I never found in Techstream.

    The Tundra ECUs I tested would only hold one main set of up to 5 tires sensors.

    Does your home page of the TPMS ecu list IDs for 5 or just 4?

    What is the number on the second row next to Main Tire? If it’s 4 it will only accept 4 ids, if it’s 5 yours has already been switched to 5 ids but if that’s the case you should have seen it on the instrument cluster, assuming you have a 2018+

    No really big incentive to add a 5th tire to a 2017 or older unless you have a headunit or 3rd party way to monitor the data.
     
    Last edited: Oct 29, 2023
    bulldog93 and ryanwgregg like this.
  25. Oct 29, 2023 at 9:56 AM
    #25
    anh6259

    anh6259 New Member

    Joined:
    Aug 16, 2020
    Member:
    #50876
    Messages:
    13
    Mine is 4 below main. At the registered 5th ID code : I have all 0s. Under 5th ID pressure is N/A. While Techstream is running, I notice that both 5th ID code and 5th ID pressure are "flashing" as if the truck is looking for the 5th signal.

    My truck is 2021.

    I tried to switch my wife's 4Runner 5 TPMS sensors around and it failed. So I am leaning toward "bad" cable. Since the 4Runner has the 5th wheel function.

    Edit:

    Bad cable confirmed. I can now add "spare" wheel and have it displayed on the dash via TechStream.

    20231102_161229.jpg
    20231102_161217.jpg
     
    Last edited: Nov 2, 2023
  26. Nov 15, 2023 at 8:19 AM
    #26
    NoMoreGreen

    NoMoreGreen New Member

    Joined:
    Dec 3, 2019
    Member:
    #39504
    Messages:
    206
    Gender:
    Male
    First Name:
    Robert
    Vehicle:
    2020 Tundra
    Does this make 5 tire rotations seamless?
     
  27. Nov 15, 2023 at 8:28 AM
    #27
    TRDFerguson

    TRDFerguson SSEM #99/RGBA #8-ish?/It’s a funny name.

    Joined:
    Oct 18, 2018
    Member:
    #20730
    Messages:
    9,968
    Gender:
    Male
    First Name:
    Jake
    Southeast Greater Basin, AZ
    Vehicle:
    2018 MGM CrüeMax
    You can still have more than 4 TPMS programmed to your truck, at least on 2018+. I've got all 5 of mine programmed, without this mod (it'll get done eventually...), and the computer picks them up fine after the next drive. I can't remember if I had to push the TPMS reset button or if it picked them all up automatically after I drove a bit.
     
  28. Nov 15, 2023 at 8:29 AM
    #28
    NoMoreGreen

    NoMoreGreen New Member

    Joined:
    Dec 3, 2019
    Member:
    #39504
    Messages:
    206
    Gender:
    Male
    First Name:
    Robert
    Vehicle:
    2020 Tundra
    odd I can’t get my truck to pick up the 5 sensor and it’s caused my TPMS light to be on.
     
  29. Nov 15, 2023 at 8:35 AM
    #29
    TRDFerguson

    TRDFerguson SSEM #99/RGBA #8-ish?/It’s a funny name.

    Joined:
    Oct 18, 2018
    Member:
    #20730
    Messages:
    9,968
    Gender:
    Male
    First Name:
    Jake
    Southeast Greater Basin, AZ
    Vehicle:
    2018 MGM CrüeMax
  30. Nov 15, 2023 at 9:05 AM
    #30
    anh6259

    anh6259 New Member

    Joined:
    Aug 16, 2020
    Member:
    #50876
    Messages:
    13
    bulldog93 and coTony like this.

Products Discussed in

To Top