Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz Forums => Honda Jazz Mk4 2020 - => Topic started by: coravel on January 30, 2024, 02:45:32 PM
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Yesterday when driving home the tyre deflation symbol lit up on the dashboard. Today I checked all four tyres to discover they were all around 29psi. It's my understanding that the correct pressure should be 33psi so that's what I've pumped them up to. However, the warning light remains on.
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You need to re initialise the tyre deflation warning system.
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In my experience of 3 Honda's with TPMS, if all tyres deflate at the same rate then the TPMS doesn't trigger as the rotation is still the same on all corners
As above, perform the reset and then complete the initialisation mileage taking in left and right hand bends
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You need to re initialise the tyre deflation warning system.
In addition you should always check the tyre pressure when the tyres are cold.
The reason for this: A somewhat deflated tyre will flex more while driving and heat somewhat more up than the others, thus feigning the correct tyre pressure.
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Many thanks for the swift response. You guys are very helpful.
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The recommended pressures shown in the drivers door jamb of my EX are 35 psi front and 33 psi rear . I use these. Using 33 psi on all four may be near enough to be safe but why not use what the manufacturers recommend? The system 'learns' if they are different during the initialisation process.
Tyres can loose about 1 psi or so a month due to air permeating through the rubber , and also tyre pressure drops in colder weather because cold air is denser and takes up less space in the tyre. So dropping from 33 psi to 29 psi is not unexpected. Actually the monitoring system might not even detect this drop as its equal all round. . It normally detects if one wheel is rotating at a different speed to the others because the tyre is going flat. So its still important to regularly check the actual tyre pressure. If the fronts drop from 35psi to 29 psi but the rears from only 33 to 29 psi over the same period you might need to keep an eye on them. But there may not be a problem. Tyre pressure gauges are not always 100% accurate or consistent to the nearest psi. But if just one tyre is losing noticeable pressure.... >:(
Sometimes I can top up all four tyre pressures equally ( or even change to my other set of wheels and tyres ) and not need to re initialise the system. But if one tyre is inadvertently adjusted to a slightly different pressure to its partners the system might activate,
The system does sometimes activate shortly after you fit new tyres (or on a brand new car with its new tyres) because the tyres can take time to settle down and bed in to the wheel rims. You might even have to reset it a couple of times before it settles down. Its possible that if all four tyres become equally underinflated over time they might start to 'squirm' more on the rims and activate the system for the same reason.
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...It's weird that the HR-V has reverted back to the same as the MK2 Jazz, 32 front an 30 rear ???
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...It's weird that the HR-V has reverted back to the same as the MK2 Jazz, 32 front an 30 rear ???
Honda may have found it was more comfortable and handled better at this pressure ,and they had a big enough advantage over its nearest rivals they didnt need to run higher pressures for better emissions results .
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The H-RV is of course a different, heavier car with a different tire size.
Different tire pressures will probably also be recommended for the Civic and C-RV.
I even suspect (but not verified) that for the Jazz with tire size 185/60R15 88H may not be advised the same pressure as for the Jazz with 185/55R16 87H or the Crosstar with 185/60R16 86H.
In short: the recommended tire pressure may differ per type of car and tire size.
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Tyre pressures on door pillar
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So once you reach 160km/h (100mph) you have to jump out and pump up the tyres to 39 / 38 ;D
Those pressures must give a harsh ride
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So once you reach 160km/h (100mph) you have to jump out and pump up the tyres to 39 / 38 ;D
Those pressures must give a harsh ride
Some might be willing to compromise on ride comfort if they mostly clock up a lot of miles on smooth motorways. Even at less than 100 mph having the higher pressure may save some fuel. Not sure the Jazz would be my first choice as a 100 mph + cruiser anyway. ;D And motorways are not always smooth these days >:(
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Our Jazz has been on all-season tires, pressure 2.7 - 2.6 bar (39 - 38 psi), from day 1. Does that make for a harsh uncomfortable ride?
I wouldn't know, never tried the lower pressure (2.4 - 2.3 / 35 - 33), so we don't know what we are missing in terms of comfort. ;D
The 'harsh ride mode' works well for us. But perhaps the tarmac/asphalt in Poland is slightly better than in the UK...?
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With those higher pressures are the tyres showing any centre wear ?
Too high - centre wear
Too low - edge wear
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The recommended pressures shown in the drivers door jamb of my EX are 35 psi front and 33 psi rear . I use these. Using 33 psi on all four may be near enough to be safe but why not use what the manufacturers recommend? The system 'learns' if they are different during the initialisation process.
Tyres can loose about 1 psi or so a month due to air permeating through the rubber , and also tyre pressure drops in colder weather because cold air is denser and takes up less space in the tyre. So dropping from 33 psi to 29 psi is not unexpected. Actually the monitoring system might not even detect this drop as its equal all round. . It normally detects if one wheel is rotating at a different speed to the others because the tyre is going flat. So its still important to regularly check the actual tyre pressure. If the fronts drop from 35psi to 29 psi but the rears from only 33 to 29 psi over the same period you might need to keep an eye on them. But there may not be a problem. Tyre pressure gauges are not always 100% accurate or consistent to the nearest psi. But if just one tyre is losing noticeable pressure.... >:(
Sometimes I can top up all four tyre pressures equally ( or even change to my other set of wheels and tyres ) and not need to re initialise the system. But if one tyre is inadvertently adjusted to a slightly different pressure to its partners the system might activate,
The system does sometimes activate shortly after you fit new tyres (or on a brand new car with its new tyres) because the tyres can take time to settle down and bed in to the wheel rims. You might even have to reset it a couple of times before it settles down. Its possible that if all four tyres become equally underinflated over time they might start to 'squirm' more on the rims and activate the system for the same reason.
Unfortunately the tyre pressures could not be found on the door jambs which is why I had to look it up on on the internet. With my Mk2 Jazz the pressures could be found inside the petrol cap which seemed very convenient to me. The car is due to go in for its 2 year service next month so I can ask questions then.
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But perhaps the tarmac/asphalt in Poland is slightly better than in the UK...?
I would not at all be surprised if it was.
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With those higher pressures are the tyres showing any centre wear ?
Yes, they do, exactly the same as inner and outer shoulder wear. ;) Perfectly even.
And what makes it even more fun: very little wear after almost 13,500 mi.
(https://www.cheesebuerger.de/images/smilie/froehlich/a020.gif) for Vredestein!
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I never even attained 10K out of the tyres on my Mk2 Jazz. The Jag I had at the same time gave me 35K miles on Pirellis.
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I have run 3 sets of all season tyres on various cars . Goodyear Vector gen 2 and Gen 3 and some budget Kumho Solus. At normal pressures. All have given exceptionally low tread wear. I cant quantify it in miles but they seem to last forever compared to summer tyres. ;D
There was something on TV this morning about rainwater runoff from motorways straight into steams. Lots of pollution from tyre dust. :o
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It's a very good point that's not good news for fishermen or those of us who eat their catch!
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I never even attained 10K out of the tyres on my Mk2 Jazz. The Jag I had at the same time gave me 35K miles on Pirellis.
Your Jazz was on Vanilla Fudge Soft tyres? ???
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There was something on TV this morning about rainwater runoff from motorways straight into steams. Lots of pollution from tyre dust. :o
[/quote]
I think brake dust and rubber tyre particles are already firmly in the crosshairs of the environmental lobby as their next campaign. Watch this space!
Sent from my SM-A336E using Tapatalk
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The major factor in tyre dust is the weight of the vehicle and resistance to rolling of the tyres in contact with the road. Lorries and heavy trucks are likely to be major contributors and heavy EV’s will play their part.
Lighter ICE cars not so much.
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Euro 7 regulations will include both tyre and brake dust emissions.
https://ec.europa.eu/commission/presscorner/detail/en/ip_22_6495
Regulate emissions from brakes and tyres: the Euro 7 standards rules will be the first worldwide emission standards to move beyond regulating exhaust pipe emissions and set additional limits for particulate emissions from brakes and rules on microplastic emissions from tyres. These rules will apply to all vehicles, including electric ones
Thou the implementation of Euro 7 has been put off at the moment.
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There was something on TV this morning about rainwater runoff from motorways straight into steams. Lots of pollution from tyre dust. :o
That'll be this:
https://www.bbc.co.uk/news/science-environment-68130715
Run-off from roads doesn't seem to be effectively regulated, monitored, or controlled. Not just tyre dust either: "Campaigners have been doing their own testing and told the BBC they had found micro-plastics, heavy metals, toxic chemicals like arsenic and carcinogenic compounds from car tyres."
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I never even attained 10K out of the tyres on my Mk2 Jazz. The Jag I had at the same time gave me 35K miles on Pirellis.
Your Jazz was on Vanilla Fudge Soft tyres? ???
If I remember correctly it was fitted with Dunlops when new which I replaced with Bridgestone when the time came. They didn't make any difference to the longevity. I had the car for 10 years by which time it had done 40K miles. I'd fitted a brand new set of tyres a month before my wife fancied changing it for the hybrid. ;)
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Euro 7 regulations will include both tyre and brake dust emissions.
https://ec.europa.eu/commission/presscorner/detail/en/ip_22_6495
Regulate emissions from brakes and tyres: the Euro 7 standards rules will be the first worldwide emission standards to move beyond regulating exhaust pipe emissions and set additional limits for particulate emissions from brakes and rules on microplastic emissions from tyres. These rules will apply to all vehicles, including electric ones
Thou the implementation of Euro 7 has been put off at the moment.
Brake pads and tyres are consumable products, they wear out, so how do they intend implementing that one !
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I never even attained 10K out of the tyres on my Mk2 Jazz. The Jag I had at the same time gave me 35K miles on Pirellis.
Your Jazz was on Vanilla Fudge Soft tyres? ???
If I remember correctly it was fitted with Dunlops when new which I replaced with Bridgestone when the time came. They didn't make any difference to the longevity. I had the car for 10 years by which time it had done 40K miles. I'd fitted a brand new set of tyres a month before my wife fancied changing it for the hybrid. ;)
Yes - Dunlop SP2030s. 10K for the front pair was about what I got on my MK2. At 10K they weren't bald but down to 3mm which is when I tend to change anyway.
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Euro 7 regulations will include both tyre and brake dust emissions.
https://ec.europa.eu/commission/presscorner/detail/en/ip_22_6495
Regulate emissions from brakes and tyres: the Euro 7 standards rules will be the first worldwide emission standards to move beyond regulating exhaust pipe emissions and set additional limits for particulate emissions from brakes and rules on microplastic emissions from tyres. These rules will apply to all vehicles, including electric ones
Thou the implementation of Euro 7 has been put off at the moment.
Brake pads and tyres are consumable products, they wear out, so how do they intend implementing that one !
You can't come on here with common sense comments like that!