reset TPMS

[Jasonmgev]

well closure on the TMPS- As suspected each tire is uniquely set to its position on the car.. So just mark the tires if you change them. Note if you need to change the rims for any reason . u need to take the car back to MG to reconfigure..

Scrunch noise... The said that it is likely a gear box issue and have reported it to MG . So waiting for them to get back to me - Good thing is that they acknowledged that it was not a normal sound

 

[Gomev]

.....
Scrunch noise... The said that it is likely a gear box issue and have reported it to MG . So waiting for them to get back to me - Good thing is that they acknowledged that it was not a normal sound

Which gearbox would that be ?

 

[ARvanHAS]

Which gearbox would that be ?

I'm Dutch but nevertheless I'm able to answer the question, since you can simply find it on Wiki.
It's off topic, but I think the use of the term Gearbox is correct:

....In British English, the term transmission refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive), differential, and final drive shafts. In American English, however, the term refers more specifically to the gearbox alone, and detailed usage differs.[note 1]

The most common use is in motor vehicles, where the transmission adapts the output of the internal combustion engine to the drive wheels. Such engines need to operate at a relatively high rotational speed, which is inappropriate for starting, stopping, and slower travel. The transmission reduces the higher engine speed to the slower wheel speed, increasing torque in the process. Transmissions are also used on pedal bicycles, fixed machines, and where different rotational speeds and torques are adapted.

Often, a transmission has multiple gear ratios (or simply "gears") with the ability to switch between them as speed varies. This switching may be done manually (by the operator) or automatically. Directional (forward and reverse) control may also be provided. Single-ratio transmissions also exist, which simply change the speed and torque (and sometimes direction) of motor output....

In our case, the gearbox is a CVT - Continuous Variable Transmission.

 

[ARvanHAS]

well closure on the TMPS- As suspected each tire is uniquely set to its position on the car.. So just mark the tires if you change them. Note if you need to change the rims for any reason . u need to take the car back to MG to reconfigure..

If I have to make an appointment every spring and autumn to reconfigure, just because the computer doesn't have the ability to adjust or to remember two wheelsets.... I wouldn't really feel like doing so.
So is there a problem preventing me from to just keep on driving with the TMPS warning on, until I change the original wheels back again in the next spring? Or is it a constant boing...boing...boing or other safety measure that would prevent me from doing that?

 

[Gomev]

I'm Dutch but nevertheless I'm able to answer the question, since you can simply find it on Wiki.
It's off topic, but I think the use of the term Gearbox is correct:

....In British English, the term transmission refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive), differential, and final drive shafts. In American English, however, the term refers more specifically to the gearbox alone, and detailed usage differs.[note 1]

The most common use is in motor vehicles, where the transmission adapts the output of the internal combustion engine to the drive wheels. Such engines need to operate at a relatively high rotational speed, which is inappropriate for starting, stopping, and slower travel. The transmission reduces the higher engine speed to the slower wheel speed, increasing torque in the process. Transmissions are also used on pedal bicycles, fixed machines, and where different rotational speeds and torques are adapted.

Often, a transmission has multiple gear ratios (or simply "gears") with the ability to switch between them as speed varies. This switching may be done manually (by the operator) or automatically. Directional (forward and reverse) control may also be provided. Single-ratio transmissions also exist, which simply change the speed and torque (and sometimes direction) of motor output....

In our case, the gearbox is a CVT - Continuous Variable Transmission.

I do not believe that the ZS has a CVT, so not aware that it has a gearbox at all. Please correct me if I am wrong It does have a single speed transmission.

 

[Kithmo]

Definitely not a CVT, a single reduction gear and differential maybe.

 

[ARvanHAS]

I do not believe that the ZS has a CVT, so not aware that it has a gearbox at all. Please correct me if I am wrong It does have a single speed transmission.

No need for believing or not, check it. Just click on the last link in my post and you'll find the facts. MG ZS EV has a CVT.

 

[Kithmo]

No need for believing or not, check it. Just click on the last link in my post and you'll find the facts. MG ZS EV has a CVT.

Wikipedia information is taken from the general public, not from any technical MG information.
Have you ever driven a car with a CVT, the ZS EV definitely does not have a CVT.
My Prius has a e-CVT drive which couples the ICE motor to the electric motor via planetary gears and as anyone who has driven a car with CVT or e-CVT will tell you, driving a CVT has the feeling of an elastic band stretching then pulling the car along. This is to let ICE engines get up to and remain as close to their efficient operating rpm when driving, sometimes set up for power, sometimes for economy.
There is no need for this in a pure EV because torque and power are instantly available from zero revolutions.

 

[ARvanHAS]

Wikipedia information is taken from the general public, not from any technical MG information.
Have you ever driven a car with a CVT, the ZS EV definitely does not have a CVT.
My Prius has a e-CVT drive which couples the ICE motor to the electric motor via planetary gears and as anyone who has driven a car with CVT or e-CVT will tell you, driving a CVT has the feeling of an elastic band stretching then pulling the car along. This is to let ICE engines get up to and remain as close to their efficient operating rpm when driving, sometimes set up for power, sometimes for economy.
There is no need for this in a pure EV because torque and power are instantly available from zero revolutions.

Hi all. I Finally had some time to search for the how and why regarding gearing and ev's.
@Kithmo is right, ofcourse.
Ev's don't seem to use cvt or any other type of shifting through gears technique. That is because the electric engine can cope with much more revs than the 7000rpm of a typical ice, so there's no use for it.
The other reason is costsaving in build and maintenance of the car.
I couldn't find why this is called e-cvt, but it is wrong. So excuse me for the mishap.

To return to the original question... Our car, as any ev, has a single Gear gearbox.

To return to the topic:
I fitted an Audi wheelset (fits perfect) and Michelin wintertires. The tpms is cloned to the ones i bought with the rims. All is well so far.

 

[A319]

My car is quite insistent that I have low pressure on my rear tight tyre. However, when I check the display it shows both front tyres at 2.2 bar and both rear at 2.0 bar, which is as it was when I picked the car up. The rear right is in amber though. Any ideas about what the issue is?

 

[Pecari]

My car is quite insistent that I have low pressure on my rear tight tyre. However, when I check the display it shows both front tyres at 2.2 bar and both rear at 2.0 bar, which is as it was when I picked the car up. The rear right is in amber though. Any ideas about what the issue is?

Try inflating the tires to 2.6 or 2.8 bar, those are the values we use here.
if you still get the message, your TPMS sensor is not good, and must be replaced.

 

[ARvanHAS]

My car is quite insistent that I have low pressure on my rear tight tyre. However, when I check the display it shows both front tyres at 2.2 bar and both rear at 2.0 bar, which is as it was when I picked the car up. The rear right is in amber though. Any ideas about what the issue is?

According to the tire garage the MG ZS EV has no TPMS reset. So I would follow Pecari's advise.

 

[jhunterwu]

Are we still not able to do this ourselves?

We can't reset it via obd2 on the canbus?

 

[Kithmo]

My car is quite insistent that I have low pressure on my rear tight tyre. However, when I check the display it shows both front tyres at 2.2 bar and both rear at 2.0 bar, which is as it was when I picked the car up. The rear right is in amber though. Any ideas about what the issue is?

The recommended tyre pressures should be 2.3 bar all round.

Are we still not able to do this ourselves?

We can't reset it via obd2 on the canbus?

Apparently the TPMS reset is done by adjusting the pressures then driving around for a while. I don't know for sure if it works as I don't know what triggers the warning, whether it's below a certain pressure in psi or bar, or when the pressure drops by a percentage of the original (or set) pressure.

 

[jhunterwu]

Seems you're right I changed to summer tires, drove a few miles and now it's gone.

 

[Ciaran 01]

I would be interested to know the outcome of your 'scrunch' check, as it is very annoying. The demonstrators I tried and my car all do it and the dealer seemed oblivious to it. If their is a fix or even knowledge of what causes it, I would b pleased to hear. Good luck

When I apply the electronic handbrake when I drive off it makes scrunch sound just thought it was the brake pads releasing.

 

[AusMGZSEV]

ICE cars have gearboxes because they have a very limited usable torque range. You need a low gear so you can rev the engine into this range and have to torque to take off. You have a high gear (typically a 1:1) so you can drive at highway speeds.
As EVs have adequate torque from 0rpm all the way to 10k or even 20k they don't require a set of ratios in a box.

 

[AusMGZSEV]

As for tyre pressure sensors, that sucks.

 

[Kithmo]

ICE cars have gearboxes because they have a very limited usable torque range. You need a low gear so you can rev the engine into this range and have to torque to take off. You have a high gear (typically a 1:1) so you can drive at highway speeds.
As EVs have adequate torque from 0rpm all the way to 10k or even 20k they don't require a set of ratios in a box.

This is what puzzles me about many of the ICE to EV conversions that retain the original gearbox, why ?

 

[AusMGZSEV]

This is what puzzles me about many of the ICE to EV conversions that retain the original gearbox, why ?

Simplicity of install sake mostly. Replace the engine with a motor and leave the car in 2nd or 3rd gear.

Instead I used a Tesla SDU in place of my diff.