cometboy
Posts: 11
Joined: Mon Nov 18, 2013 12:24 am
Location: Adelaide, South Australia

TPMS on i-MiEVs

Wed Dec 04, 2013 2:20 pm

Anyone played with TPMS on this forum?

All the U.S. i-MiEVs must have it as I think the U.S. Federal Regulations require that all new light vehicles sold in the U.S. since September 2007 be equipped with a Tire Pressure Monitoring System (TPMS). Our Australian delivered models do not have this even as an option.

Some questions:
- Is the sensor/xmitter in the valve stem?
- How is it powered and what is the battery life?
- How is it displayed?
- Is there an audio warning alarm?
- Is it a seperate black box or wired into the CAN bus? (I can not see any reference to it in my DVD workshop manual but it does not cover the US models)
- Just wondering if it is something that can be retro fitted or if aftermarket is the only option?

Thanks
Bruce
Last edited by cometboy on Wed Dec 04, 2013 7:41 pm, edited 1 time in total.

PV1
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Re: TPMS on i-MiEVs

Wed Dec 04, 2013 2:54 pm

The only display of the TPMS is a warning light for low pressure. I'm pretty sure they are valve stem type.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
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iMiEVNZ7
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Re: TPMS on i-MiEVs

Thu Dec 05, 2013 8:23 pm

http://avetechnology.en.alibaba.com/pro ... _road.html


Looks pretty cool. Note sensors inside rim... Might need to remove tire to change batteries ?. I would have thought a movement based recharging system might be an idea.

http://i01.i.aliimg.com/img/pb/714/926/ ... 3_5192.jpg

Don
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Re: TPMS on i-MiEVs

Fri Dec 06, 2013 6:39 am

The batteries last a long time (several years) because the system is only in operation when the wheels are turning. It would probably be advisable to change them when you buy new tires - New valve stems and new TPMS batteries

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1994 Miata 60K miles - Soon to be sold
1979 Honda CBX six into six

Barbagris
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Re: TPMS on i-MiEVs

Fri Dec 06, 2013 8:37 am

My Euro-clon don't have TPMS. But it's possible to mount one in a car without sensors on the rim. A low pressure wheel present shorter effective radius, and if ABS sensor realizes one wheel is spinning faster than the others... Alarm!

See "indirect TPMS" or iTPMS in the wikipedia:

http://en.wikipedia.org/wiki/Tire-press ... ing_system
...learning...

PV1
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Re: TPMS on i-MiEVs

Fri Dec 06, 2013 11:45 am

Barbagris, the GM EV1 had that feature. I guess it ties into the steering position sensor, or otherwise it would warn you of low pressure every time you turned the wheel.

Wouldn't work too well if all four tires were low. :lol:
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

2017 Bolt EV LT in Orange with QC - 7/31/2017

Driving electric since 2-21-2013.

Slicke
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Joined: Tue May 09, 2017 5:37 am

Re: TPMS on i-MiEVs

Mon May 15, 2017 10:03 pm

Don wrote:The batteries last a long time (several years) because the system is only in operation when the wheels are turning. It would probably be advisable to change them when you buy new tires - New valve stems and new TPMS batteries

Don


Does the battery lose it's power if you don't drive it for a while?

Don
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Re: TPMS on i-MiEVs

Tue May 16, 2017 9:38 am

No more than a lithium battery sitting on a shelf - There's no current draw on the battery if the vehicle isn't moving

I noticed on my Ford alloy wheels, they machined away some aluminum on either side of the valve stem - I surmise this is to make up for the weight of the sensor on the valve stem so it doesn't cause an imbalance which would need to be corrected by adding extra weights on the opposite side of the wheels. Not sure if the iMiEV wheels are the same or not

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1994 Miata 60K miles - Soon to be sold
1979 Honda CBX six into six

jray3
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Re: TPMS on i-MiEVs

Tue May 16, 2017 11:15 am

A downside to our TPMS is that they have to be individually linked to the car, and my local tire shop couldn't do it, though they thought they had all the latest tools and software updates... The dealer of course wants a pound of flesh every time, so TPMS is only active on my winter wheels, and not the summer set.
2012 i-SE "MR BEAN" 70,000 miles
i-ES traded at 21,648 miles
2000 Honda Odyssey
1987 F250 Diesel
1983 Grumman Kurbwatt,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

Don
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Re: TPMS on i-MiEVs

Tue May 16, 2017 12:17 pm

Ours is simple compared to my Ford - On it, each individual wheel is separately linked, so just rotating tires requires that you 'relearn' the position of each wheel. Luckily, you can do this yourself and not have to pay the 'dealer minimum' . . . . a strange name which allows charging $100 for 5 minutes work

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1994 Miata 60K miles - Soon to be sold
1979 Honda CBX six into six

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