tyre pressure monitoring system

1. the simple "passive" version which diagnoses the wheel rotations via the ABS sensors. Pro: cheap. Contra: not 100% exact measurements/ no warning when the pressure goes down in all four tyres
2. the "active" pressure sensor in the valve cap. Pro: accurate! Contra: Price/extra technique built in/ additional efforts (time and money) when changing tyres.

bemax said:

Does anybody know how the tyre pressure monitoring works in the Grenadier?
As far as I know there are two systems on the market.

1. the simple "passive" version which diagnoses the wheel rotations via the ABS sensors. Pro: cheap. Contra: not 100% exact measurements/ no warning when the pressure goes down in all four tyres
2. the "active" pressure sensor in the valve cap. Pro: accurate! Contra: Price/extra technique built in/ additional efforts (time and money) when changing tyres.

There have been pictures from the central display with three digit pressure details for each wheel including the temperature as well. I guess that this is so exact that there has to be either a small DaveB or an active sensor built in.

Any comments?

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Logsplitter said:

If I’m out in the bush somewhere and either my tyre is damaged and I damage the tpms during puncture repair, or the valve is ripped out or damaged whilst in severe off road conditions, can I replace the tpms valve with a regular valve , or will the ECU throw a wobbly and put me into limp mode. I would like to think I could disable the tpms and put regular valves in to get me home. Maybe if tpms valves are cheap enough I could carry spares in with my tyre puncture repair kit.
Any thoughts anybody ? This technology is completely new to me.

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Logsplitter said:

If I’m out in the bush somewhere and either my tyre is damaged and I damage the tpms during puncture repair, or the valve is ripped out or damaged whilst in severe off road conditions, can I replace the tpms valve with a regular valve , or will the ECU throw a wobbly and put me into limp mode. I would like to think I could disable the tpms and put regular valves in to get me home. Maybe if tpms valves are cheap enough I could carry spares in with my tyre puncture repair kit.
Any thoughts anybody ? This technology is completely new to me.

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ADVAW8S said:

When you flip the switch to offroad mode, the TMPS no longer gives a warning. I am going off memory.

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Spjnr said:

It would still be handy to have the readings though for when airing down.

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ADVAW8S said:

When you flip the switch to offroad mode, the TMPS no longer gives a warning. I am going off memory.

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ADVAW8S said:

When you flip the switch to offroad mode, the TMPS no longer gives a warning. I am going off memory.

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Logsplitter said:

I suppose ideally you would need to disable TPMs completely even when not in offroad mode, if you you re a few hundred km from the nearest town, with damaged tyres. Out of interest what speed can you go in off-road mode and can off-road mode be used without the centre diff locked, if so then this would be the way to get to the nearest town at a reasonable speed. Hopefully this something that can be worked out.

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DaveB said:

You can use off-road mode anytime but think it disengages at 70kmh, wading mode is the same

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Logsplitter said:

If I’m out in the bush somewhere and either my tyre is damaged and I damage the tpms during puncture repair, or the valve is ripped out or damaged whilst in severe off road conditions, can I replace the tpms valve with a regular valve , or will the ECU throw a wobbly and put me into limp mode. I would like to think I could disable the tpms and put regular valves in to get me home. Maybe if tpms valves are cheap enough I could carry spares in with my tyre puncture repair kit.
Any thoughts anybody ? This technology is completely new to me.

Click to expand...

Logsplitter said:

If I’m out in the bush somewhere and either my tyre is damaged and I damage the tpms during puncture repair, or the valve is ripped out or damaged whilst in severe off road conditions, can I replace the tpms valve with a regular valve , or will the ECU throw a wobbly and put me into limp mode. I would like to think I could disable the tpms and put regular valves in to get me home. Maybe if tpms valves are cheap enough I could carry spares in with my tyre puncture repair kit.
Any thoughts anybody ? This technology is completely new to me.

Click to expand...

Logsplitter said:

If I’m out in the bush somewhere and either my tyre is damaged and I damage the tpms during puncture repair, or the valve is ripped out or damaged whilst in severe off road conditions, can I replace the tpms valve with a regular valve , or will the ECU throw a wobbly and put me into limp mode. I would like to think I could disable the tpms and put regular valves in to get me home. Maybe if tpms valves are cheap enough I could carry spares in with my tyre puncture repair kit.
Any thoughts anybody ? This technology is completely new to me.

Click to expand...

IG_in_AZ said:

@Logsplitter They are relatively cheap. I've had versions of them on my last 3 vehicles and replacing the tires at the end of their life, I believe they add about $15 per tire to replace the TPMS with new ones. They're plastic, and I assume the tire techs destroy them when dismounting the tire, or perhaps the battery life is assumed to be done as well. Just speculation as to why, but they always replace them along with fresh tires.

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