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BigJimny Meet 2019 (17 May 2019)

BigJimny Meet and off-road driving day



20TH OCTOBER 2019

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Re:Re:Re:Swapping Tyres Around For Even Wear

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15 Jun 2019 12:11 #209976 by Lambert
But then why would the manual suggest rotating them?

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15 Jun 2019 12:34 #209978 by RainerK
I have the 5 original tires, all with TPMS and I made the 5 tire change as per manual and the TPMS did not show anything.

Rainer from sunny and warm Vienna

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15 Jun 2019 13:04 - 15 Jun 2019 13:07 #209979 by Scimike
This could be why on G4 you need to rotate. Could it be indirect TPMS system will alarm if your tyre wear at different rates.?
If it's indirect swapping tyres around will not cause issues.

There are two different types of systems being used today: Direct TPMS and Indirect TPMS.

Direct TPMS uses a sensor mounted in the wheel to measure air pressure in each tire. When air pressure drops 25% below the manufacturer’s recommended level, the sensor transmits that information to your car’s computer system and triggers your dashboard indicator light.

Indirect TPMS works with your car’s Antilock Braking System’s (ABS) wheel speed sensors. If a tire’s pressure is low, it will roll at a different wheel speed than the other tires. This information is detected by your car’s computer system, which triggers the dashboard indicator light
Last edit: 15 Jun 2019 13:07 by Scimike.

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15 Jun 2019 13:13 #209981 by Bill Portland
The gen4 systems displays the actual pressure in psi for each tyre so it must be the direct system(?) which suggests the system must know where each tyre is on the car too(?) Or 4 local sensors, each close to each wheel.

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15 Jun 2019 13:33 #209982 by Soeley

RainerK wrote: I have the 5 original tires, all with TPMS and I made the 5 tire change as per manual and the TPMS did not show anything.

Rainer from sunny and warm Vienna


It would only show up something when a tyre is low on pressure. So swapping tyres might result in the system telling you the front nearside tyre is low, but in reality it could be rear offside tyre depending on the rotation you have done.

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15 Jun 2019 16:12 #209986 by Riccy
I would suspect that there is a reader for each wheel in the wheel arch somewhere, thats probably how it knows which wheel is at what pressure. Therefore it doesnt matter which wheel is where, so long as they all have the tpms thing in the wheel.

I presume it doesnt monitor the spare tyre pressure?

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16 Jun 2019 08:50 #210012 by RainerK
I am not sure that there is something in the weel arches that measure the individual tires. And there is only a yellow light in the instrument cluster to show that some tire pressure is to low.

So, I would think that the original reserve tire also hat a pressure measurement. If it is „connected“ while mounted on the door I do not know. But that would be nice because also the spare tires might loose pressure.

I once had this on my other car, but luckily I had a compressor.

In the manual is written that after using the reserve tire the TPMS light will light for 10min. I did not observe this.

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16 Jun 2019 09:53 #210016 by Scimike
So been googling.

If the G4 shows actual individual tyre pressures then it implies it's a Direct TPMS system. I don't know for sure as I don't own a G4.

If it's direct TPMS various systems exist with single or more receiving nodes, going as far as individual identification of each wheel with a unique ID number logged with the ECU. This system requires the ID to be reprogrammed to the ECU if you rotate the tyres as it will no longer accurately reflect it location on the car. So it will still work post rotate, but it will just tell you the wrong location for the tyre.

I don't know which system the G4 uses, but if someone with a G4 swaps the tyres around and let's one down we will soon know if it's a problem or not. I hate gadgets :laugh:

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16 Jun 2019 10:16 #210018 by Bob1050
Went and consulted the Suzuki manual, which I probably should have done in the first instance. Under the heading "Tyre Rotation" it states that you should rotate your tyres every 6k miles. You even have a choice as to whether to follow the 4 tyre or 5 tyre system. Now I cannot imagine the average owner bothering to undertake such as task and it's not part of the annual dealership service. Many drivers call out the AA or RAC to change a single wheel after a flat tyre - asking them to rotate 5 is almost laughable. Fortunately I have a trolley jack and I'm able to do the job - so I will - - now do I do the 4 or 5 tyre rotation?

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16 Jun 2019 12:00 #210023 by Gadget
If your spare is covered, I'd probably just rotate the 4 in use, if it's exposed to the elements, I'd rotate all 5.

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16 Jun 2019 12:20 #210024 by Bill Portland

RainerK wrote: I am not sure that there is something in the weel arches that measure the individual tires. And there is only a yellow light in the instrument cluster to show that some tire pressure is to low.

So, I would think that the original reserve tire also hat a pressure measurement. If it is „connected“ while mounted on the door I do not know. But that would be nice because also the spare tires might loose pressure.

I once had this on my other car, but luckily I had a compressor.

In the manual is written that after using the reserve tire the TPMS light will light for 10min. I did not observe this.

My car shows 4 individual tyre pressures (in psi) and its position, no mention of a 5th. Suggests 4 transmitters and 4 receivers. So moving 4 wheels shouldn't be an issue. Introducing the spare shouldn't be an issue either, provided it also has a transmitter. But it looks like the spare isn't monitored even if it has a transmitter

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16 Jun 2019 14:05 #210029 by facade
The 4 tyre rotation will need two jacks, you only need 1 jack for the 5 tyre rotation, as you have an extra wheel to put on. :)

Doubt very much if I will bother, unless two start wearing faster.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)

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