TPMS

Scimike wrote: What's the actual Suzuki recommend PSI for tyres on the G4?
Only asking as if it's 26 psi as per G3 then a trigger level of 24 psi or just below on the TPMS is awfully close to normal operating pressure. I googled and the web (it must be correct :laugh: ) suggested a typical 25% from recommend pressure is the normal trigger point. So at 26 PSI that's 19.5 psi, or at 32 psi it's 24 psi - that's an interesting coincidence.
So is 32 psi correct operating pressure or have Suzuki incorrectly set the trigger point as per the Swift etc?
Just over thinking it for fun.
Mike

It is 26 psi for the Gen4 with a light load
I think it triggers at 23.00, I had 4 23s but only the NSF, which catches the sun on the drive flashed, logically the NSF would be the warmest, and in the cold darkness therefore it will drop to the lowest, the other 3 must have been 23 and a big enough bit not to trigger it.

90% of 26 is 23.4, so 23.00 is more than the 10% difference that should have the ATS fitter taking them off the rims!

25 % would be better I agree, but I just want the warning to stay off- I normally check the pressures with a swift kick, and get the gauge out only if I'm going hundreds of miles on the motorway (but I'm a Bad Driver :whistle: )

According to the tyre pressure sticker on the car - Gen 4 is 26 psig all round for lightly loaded or increase the rears to 29 psig if 4 up with luggage. Interesting that my warning lights came on at only 1.5 psig under the recommended 26 psig. The comments about a tyre dealer removing tyres if more than 10% under-inflated sounds like a job creation wheeze to create an additional income stream.

It does seem that the differential between "normal pressure" and "low pressure" is too small (much like the differential between headlights on and headlights off is too small). I wonder if its adjustable in the software somewhere?

Alas Fossie, that is not the way it works. If the tyre is at 26psi in the summer at 24C and we add more air in the winter to make the tyre 26PSI at14C, the amount of tyre in contact with the road will be the same in both summer and winter.

For the reason that facade explained above.

To me it does appear to be a bit trigger happy. What you actually have is a cold weather warning device, sort of tyre pressure based ice warning :laugh:
I negative is that some could possibly over inflate tyres just to avoid getting temperature based warnings. I know my Jimny gets more lively (bouncy) if the pressure goes much above 26. I would think the device just sends back a representation of the tyre pressure, so the trigger level must be in Software????
Possibly something Suzuki could adjust?
Who knows, it's easier just to put 32 psi in the tyres like ATS.

Bill Portland wrote: The 1st coolish morning this morning (5°C) and within 100 yds of setting off the dashboard lit up with tyre pressure warnings. All tyres showing as 23 or 24psi on tpms. A short trip and the tyres were showing 24 or 25psi, warnings still lighting up the dash. I know that, when warm, the tyres are all where they should be - 26 or 27psi. Does this mean that every cool morning the dashboard's gonna be lit up for a few miles til the tyres get warm?

Had this happen on Wednesday morning. All showing 23psi., but the warning was for NSF only. Pressure readings increased to 25psi all round, but warning did not clear, even after stopping and restarting.
The car was parked for several hours, and when started, the low pressure warning still showed. After driving a few miles, it cleared.

It will be a pain if this is the norm on a cold morning.



Steve.