Flat tyre warning

[Marius]

How does it works ? i've fitted new wheels which have no sensors ,today red warning light came on ,one of the tyre had 1.5bar only . How did it knew ?

 

[andysat]

AFAIK it compares the rotational speed from the ABS sensors

 

[fixit man]

It uses the wheel speed sensors (part of the ABS system) when the tyre is low on air it rotates slower than the other wheels ..that's how it knows !!

 

[RedSox]

It uses the wheel speed sensors (part of the ABS system) when the tyre is low on air it rotates slower than the other wheels ..that's how it knows !!

What he said!

 

[Marius]

that's good, as my mrs freaked out when she saw the warning light :lol:

 

[ben g]

You let your better half drive your z4? Are you insane? :lol:

 

[Swiftly]

You let your better half drive your z4? Are you insane? :lol:

You're a braver man than me Marius!

 

[Marius]

I'm fell bad every time she's out


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[powerontap]

It uses the wheel speed sensors (part of the ABS system) when the tyre is low on air it rotates slower than the other wheels ..that's how it knows !!

Correct except that it rotates quicker, not slower. With a reduced overall diameter, it needs to try and "catch up" with the other wheels.

 

[fixit man]

It uses the wheel speed sensors (part of the ABS system) when the tyre is low on air it rotates slower than the other wheels ..that's how it knows !!

Correct except that it rotates quicker, not slower. With a reduced overall diameter, it needs to try and "catch up" with the other wheels.

OK , didn't know that thought it would go slower because of more Friction, well I learnt something today