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Re:Anyone figured out how to turn off the TPMS?

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06 Aug 2022 18:12 #244420 by 300bhpton
Or at least reprogram it?

I really wouldn’t mind if it triggered at say 18psi. Ie something useful if you really had a flat tyre. 

Today the bloody system triggered (normally only does it in winter, not summer). 

No flat or anything. But all tyres showing as 26psi with drivers rear being highlighted. 

Have driven about and got them to show 29psi all round. But the tpms alarm is still present. 

I think I had it set to Load rather than Comfort. Which despite the manual not saying what this means. I think I’ve figured it out. It is expecting 26/26psi front/rear for comfort and 26/29psi front/rear for Load. 

That said, only a couple of days ago it was showing 26/27psi front/rear on the display and no alarm. So why doesn’t the sodding thing switch off when it gets to 29psi all round? I’ve had to inflate the rears to over 30psi to get the dash to stop looking like a Christmas tree!!!!

It wouldn’t be so bad, but with the TPMS triggered the dash is useless. You can’t use the trip, traffic sign recognition, mpg, range, etc.

And worse. You can’t even access the menu to switch between Load and Comfort. Despite the fact the pressures would have been 100% correct for Comfort. You can’t do anything, not even adjust the clock or even use the TPMS Reset. Forcing you to over inflate tyres just to get the menu options back. It truly is appallingly designed. 

Has anyone found either a way of removing the system completely or adjusting the psi value? As said, something like 18psi warning would have true value. Rather than the current setup that has no value and only annoyance. 
The following user(s) said Thank You: marbit37

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07 Aug 2022 10:09 #244428 by marbit37
Also interested in this, for the same reasons

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07 Aug 2022 13:57 #244430 by mlines
As far as I am aware it is not possible at the moment to re-programme the TPMS. 

The TPMS system is based on a system from Continental. It uses Continental Sensors and a Continental receiver. As far as I can tell this Sensor/Receiver system simply transmits the sensor data to the Suzuki Body Control Unit (BCU). The BCU then interprets the data compared to the LOAD and COMFORT settings in it and acts accordingly. In theory, in the BCU, is this table of values and it could be edited. Indeed we can see data tables in the BCU through using the Suzuki tool but these are lists of random numbers with no contect or reference to them and it appears possible to read them but not to write them although it is possible to update the BCU as a whole. No-one appears to have hacked it (yet!)

The only real method at the moment is to remove the tyre sensors and fit a TMPS faking unit. This feeds fake values to the Continental receiver and deceives the system

I and another member have tried the solution from IronGates. We both found this system difficult to get working although once you have fiddled around with it then it does work.

Overall , in normal operation, the sensor "learn" sequence seems unreliable. Both after a sensor change/move it can take a while to detect and automatically correct the system. Mine has sometimes instantly learnt new positions/parameters and other times it take a long time. With the SZ5 we once had it take a 90 minute journey to relearn everything and our commercial took 2 days of lots of trips.

The trick to remember is the timings.

1. The system clears itself after 20 minutes of being switched off, Suzuki recently said "better to wait two hours". So switch off, lock the car and walk away for 2 hours.

2. Once it has been cleared, go for a drive where during the FIRST TEN MINUTES you can achieve a steady speed of at least 20 mph, ie no junctions, no traffic lights, no roundabouts. 

Doing this seems to be the most effective way of relearning things, If you cannot maintain the speed for 10 minutes its best you start the 2 hour wait again.

Martin

Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses

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07 Aug 2022 20:03 #244436 by Velocette
Has anyone else tried to make a small pressure vessel to place the sensors in and then inflate it to the optimum pressure to fool the system. I tried it with a strong screw threaded plastic bottle with a schrader valve fixed in the end. Placed all four sensors in it and blew it up to 25psi but the problem was that it wouldn't hold a seal for long, but did work for a short period. Instead of making a solid vessel and doing the job properly i got some cheapy sensors off ebay which have worked fine now for three years. Its a thought though .

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07 Aug 2022 20:57 - 07 Aug 2022 22:30 #244440 by Scimike
TPMS, what a pain and for most a warning on the dash to be ignored. Useless legislation, trying to make things safe for the mechanically inept, those that can't check tyre pressures or tell they have a flat when driving along.
Good idea the pressure vessel. Get a steel spare wheel, drill 4 valve holes and fit them all in that, then over inflate the spare and leave it on the back door. Would that work or do they need to rotate?

I don't like electronic gizmos. 
 

Yokohama Geolanders, Sony head unit, NAUTILUS Air Horn, DRL conversion, Rear cargo space, Elvis Bobblehead, transfer Guard, Indian hanging Elephant, Koni Heavy track dampers, Custom SS exhaust, Voodoo Doll, Adventure Rack with LED ight bar, vintage ERIBA caravan usually attached (yes it's slow)
Last edit: 07 Aug 2022 22:30 by Scimike.

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08 Aug 2022 05:31 #244442 by mlines
They need to rotate AND rotate at DIFFERENT angular velocities to simulate the different positions on the axles so the receiver can calculate their different positions on the car

Sent from my moto g42 using Tapatalk

Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses

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08 Aug 2022 08:56 #244444 by Lambert
It does also raise the issue of insurance companies using a tpms delete or defeat to withhold cover on the basis of the system being a legally required one if a loss adjuster feels it was a contributing factor in a collision. If there is an excuse they will exploit it.

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.

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