01-29-2019, 02:41 PM
|
#1
|
Member
|
|
Join Date: Dec 2010
Location: SC
Posts: 253
|
|
Member
Join Date: Dec 2010
Location: SC
Posts: 253
|
Help solve this TPMS mystery
I'm trying to wrap my brain around whats going on with my TPMS and hopefully someone will be able to chime and and help me figure out what is going on.
Shortly after I passed 200k miles I had the blinking TPMS light go off. Took it to my local NTB and they confirmed it was a single sensor with a bad battery that needed to be replaced for $65.
They replaced the sensor with a new one but were having trouble resetting the TPMS light. They were eventually able to reset the light, but a solid TPMS light came on as soon as I pulled in my driveway 10 miles later. I checked all 5 tire pressures and they were fine.
So I take it back the next day, and they tell me the first diagnostic was incorrect and that there is a second sensor that has gone bad and needs replacing. At that point I said just put the old sensor back and refund my money and I'll just simply bypass the system.
Well they put the old sensor back in, refunded my money, reset the system, and its been almost 500 miles and 14 days later and still no TPMS light has come back on.
Is it possible to bypass the TPMS through software? Could they have possibly done this? Why would the system flash a blinking light, then a solid light, then no light with the same exact sensors in place and same PSI?
__________________
'99 SR5, 2007 Sport
|
|
Reply With Quote
|
01-29-2019, 02:52 PM
|
#2
|
|
Member
|
|
Join Date: Jul 2016
Location: Vancouver, WA
Posts: 523
Real Name: Chris
|
|
Member
Join Date: Jul 2016
Location: Vancouver, WA
Posts: 523
Real Name: Chris
|
__________________
2005 V8 Limited. ARB Bumper, ARB Touring rack, Bilstein 5100 with Toytec 3" Tacoma springs, OME 2895's, 255/80 Cooper ST Maxx. TG spacers. JBA UCA.
|
|
Reply With Quote
|
01-29-2019, 03:01 PM
|
#3
|
|
Senior Member
|
|
Join Date: Aug 2016
Location: CA
Posts: 3,528
|
|
Senior Member
Join Date: Aug 2016
Location: CA
Posts: 3,528
|
I am still new to the TPMS game but here is how I understand it…
You can either buy sensors with a fixed RFID which require you to re-learn / program into the car using the OBDII port… or buy programmable sensors and clone the existing sensor RFID which does not require any modification on the vehicle side.
I suspect if your truck was re-programmed, you might be missing a sensor from inventory causing the issues you are seeing.
|
|
Reply With Quote
|
01-29-2019, 04:37 PM
|
#4
|
|
Member
|
|
Join Date: Dec 2018
Location: Lyndhurst, Ohio
Posts: 167
Real Name: Eric
|
|
Member
Join Date: Dec 2018
Location: Lyndhurst, Ohio
Posts: 167
Real Name: Eric
|
I'd bet they put another sensor in. They screwed up in some manner and they are covering their ass.
__________________
2007 4.7 Limited - Let the fun begin!
|
|
Reply With Quote
|
01-29-2019, 04:52 PM
|
#5
|
|
Member
|
|
Join Date: Dec 2017
Location: NoVa / DC / Shenandoah Valley / GWNF
Posts: 322
|
|
Member
Join Date: Dec 2017
Location: NoVa / DC / Shenandoah Valley / GWNF
Posts: 322
|
TPMS sensor batteries typically last 10 years, all 5 typically need to be replaced at the same time. Use Denso sensors, (or Dill).
When one sensor is replaced, all 5 sensor IDs need to be uploaded to the ECU.
(or Did they clone the bad sensor ID?)
It's really Not that complicated..
I check my tire pressure with my TPMS scanner without loosening a valve cap.
__________________
2007 T4R Sport V8 4WD, 145K, Seat Warmers, Pioneer NEX
2007 T4R Limited V8, 4WD, 181K, OME 2"
2014 GX 460 Premium
1997 FZJ80 OME 2.5"
2006 T4R Limited V8 - R.I.P.
|
|
Reply With Quote
|
01-30-2019, 09:12 AM
|
#6
|
|
Member
|
|
Join Date: Aug 2017
Location: MN
Posts: 264
Real Name: Newell
|
|
Member
Join Date: Aug 2017
Location: MN
Posts: 264
Real Name: Newell
|
Short answer is no, it is not possible through software alone. Solid light is low pressure. Blinking indicates a miscommunication, which will flash for a minute or two then stay solid. Doesn't necessarily mean its bad/dead.
I have experienced the flashing light a couple times in the past month. Started on a 3500 mile road trip but I figured it was due to the large temperature fluctuations, as every check pressure was unchanged.
Should still look into the bypass or replacing.
|
|
Reply With Quote
|
01-30-2019, 11:02 AM
|
#7
|
Member
|
|
Join Date: Dec 2010
Location: SC
Posts: 253
|
|
Member
Join Date: Dec 2010
Location: SC
Posts: 253
|
The 4Runner must have known I was talking about it, because the solid light came back on this morning.
Verified that all 5 tire Psi was still correct. No idea what’s going on but I’m going to do the bypass via jumpering the two with a small gauge wire and be done with it for good.
__________________
'99 SR5, 2007 Sport
|
|
Reply With Quote
|
02-04-2019, 01:46 PM
|
#8
|
|
Member
|
|
Join Date: Dec 2013
Location: so cal
Posts: 265
Real Name: Gary
|
|
Member
Join Date: Dec 2013
Location: so cal
Posts: 265
Real Name: Gary
|
TPMS is a weird thing. I was a Costco Tire Center Mgr for 13years, and I’ve seen TPMS do weird and unexplainable things. My own 07 4R has OEM sensors still working, but I can’t explain how I drove around for a month without my spare in the car, and it never noticed?
I know that many times, we scan all 4, find a dead one, replace it, then another shows up dead at the relearn process. I assume the relearn eats up some battery life, so if you’re at 5% remaining on a sensor that didn’t show as dead, that relearn is often the final nail in the coffin. That is why we almost always recommend replacing all at once. It would be so nice if the sensors some how showed remaining battery, but they do not. Makes us seem like liars, but we’re not...
Toyota’s are by far the trickiest, followed by Push-button start Fords and some Chevys that display the psis.
__________________
I like my droop droopy
Front: Swayaway 2.5s + TC UCAs--Rear: Swayaway 2.5s + Icon 3.0 springs + Light Racing Jounce Shocks — 285/70R17 BFG KO2s
My build: http://www.toyota-4runner.org/4th-ge...ld-thread.html
|
|
Reply With Quote
|
02-04-2019, 08:17 PM
|
#9
|
Member
|
|
Join Date: May 2017
Location: Virginia/DC Metro Area
Posts: 164
|
|
Member
Join Date: May 2017
Location: Virginia/DC Metro Area
Posts: 164
|
I'd bet the sensor they installed isnt being picked up.
Anecdotally, I had a spare that was perpetually flat, and left it at my house a few days while I went to work. when that sensor was out of range, the light illuminated solidly, and that behavior should be the same if the sensor is dead, or the sensor they replaced is still programmed and the new sensor is not.
if you're a tech savvy person, it is possible to get Toyota's Techstream so you can see/edit the TPMS sensor IDs yourself. Then you could either leave out the sensor that was removed by the shop (leaving one tire unable to report), provide the new ID (assuming it's compatible and you know the ID) or any number of other possibilities.
Bypassing with software I guess might be possible this way, I dont know what happens if you intentionally "unlearn" all of the sensors.
My recommendation would be to do the hardware bypass, but wire in a switch so you can turn it off/on at will. It's a really easy job, and you can hide the switch in the glovebox.
|
|
Reply With Quote
|
02-04-2019, 09:18 PM
|
#10
|
Junior Member
|
|
Join Date: Feb 2019
Location: NorCal
Posts: 1
|
|
Junior Member
Join Date: Feb 2019
Location: NorCal
Posts: 1
|
I'm trying to figure out a TPMS issue too... Blinking light for me. New sensors going in soon on all 4.
|
|
Reply With Quote
|
02-04-2019, 10:31 PM
|
#11
|
|
Member
|
|
Join Date: Jan 2016
Location: Arvada, Co.
Posts: 590
Real Name: Neil
|
|
Member
Join Date: Jan 2016
Location: Arvada, Co.
Posts: 590
Real Name: Neil
|
Quote:
Originally Posted by CJDrums
I'm trying to figure out a TPMS issue too... Blinking light for me. New sensors going in soon on all 4.
|
Don’t forget the spare for #5
__________________
1st was an 87, 2nd was a 95 and 4th gen is a 04 V8 Sport. OME 885/Toytec RCC2.0HD, SPC UCA's, RCI Sliders with top tread, Airlift 1000, and BFG ATKO2's - 265/70/17's. Tekonsha brake controller, EBay interior LED's, and Kenwood DDX 594 radio. Yakima roof rack for all seasons up top.
Build thread: http://www.toyota-4runner.org/4th-ge...ld-thread.html
|
|
Reply With Quote
|
02-27-2019, 09:24 PM
|
#12
|
Member
|
|
Join Date: Dec 2010
Location: SC
Posts: 253
|
|
Member
Join Date: Dec 2010
Location: SC
Posts: 253
|
Quote:
Originally Posted by gfluff
TPMS is a weird thing. I was a Costco Tire Center Mgr for 13years, and I’ve seen TPMS do weird and unexplainable things. My own 07 4R has OEM sensors still working, but I can’t explain how I drove around for a month without my spare in the car, and it never noticed?
I know that many times, we scan all 4, find a dead one, replace it, then another shows up dead at the relearn process. I assume the relearn eats up some battery life, so if you’re at 5% remaining on a sensor that didn’t show as dead, that relearn is often the final nail in the coffin. That is why we almost always recommend replacing all at once. It would be so nice if the sensors some how showed remaining battery, but they do not. Makes us seem like liars, but we’re not...
Toyota’s are by far the trickiest, followed by Push-button start Fords and some Chevys that display the psis.
|
Fascinating post from someone with 13 years of experience, I appreciate your insight about the relearning process eating up the remaining battery life.
I'm chalking this TPMS mystery to exactly what you described, weird and unexplainable.
After resetting the system and verifying all 5 tire pressures at the beginning of the month, the TPMS light went out, only to come back on solid a few days later. I was getting ready to bypass the system when I decided to check all tire pressure again, turns out I have a slow leak in the rear tire and it was indeed low. Have been keeping it inflated to correct psi and.....the light went out!
The TPMS lights been out for three weeks now, after flashing for weeks with two supposedly dead sensors.
Completely bizarre, but its clearly functioning properly again. As you said, weird and unexplainable.
__________________
'99 SR5, 2007 Sport
|
|
Reply With Quote
|
02-28-2019, 02:59 PM
|
#13
|
|
Member
|
|
Join Date: Dec 2017
Location: NoVa / DC / Shenandoah Valley / GWNF
Posts: 322
|
|
Member
Join Date: Dec 2017
Location: NoVa / DC / Shenandoah Valley / GWNF
Posts: 322
|
Typically, Toyota/Denso TPMS sensors last 10+ years, best to replace all the TPMS sensors when you are due for new tires around that time frame, so the wheel does not need to be broken down to just to update the TPMS sensors.
Some models have 5 sensors.
People, it's really not that complicated...
Once the new TPMS sensors are installed the serial numbers need to be uploaded to the ECU, takes maybe 3 mins.
__________________
2007 T4R Sport V8 4WD, 145K, Seat Warmers, Pioneer NEX
2007 T4R Limited V8, 4WD, 181K, OME 2"
2014 GX 460 Premium
1997 FZJ80 OME 2.5"
2006 T4R Limited V8 - R.I.P.
|
|
Reply With Quote
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is On
|
|
|
|