Tyre pressure sensors

[Deletedmember130310]

Yes, it has an ABS fault too. I've already changed out the wheel speed sensor, but as that didn't sort it out am assuming I'm going to need to do the Reluctor ring too. I was just wondering whether the sensors for the tyre pressures and the wheel speed ABS sensors could be related at all and there's something I haven't thought about? This before having the hassle of stripping out the rear suspension, including the bl**** ride height airbag and all the grief that entailed a month or so ago.

What error codes did you / have you got that led you to the ABS fault?

 

[donshl]

Also Genuine wheel sensors can be had for around £20 each, I just retrofitted TPMS to my CLS (waiting to fit the wheel sensors)

 

[Baldbloke]

What error codes did you / have you got that led you to the ABS fault?

The fault code is 4497.
The readout says: Test: L6/3 (left rear speed sensor). Rotor

 

[Baldbloke]

The basic TPMS system does not have air pressure sensors inside the tyres, instead ot relies on the ABS speed sensor. If this is the TPMS system you have, then the faults are all related.

The higher-end TPMS system has RF sensors inside the tyre, and this system can also display the actual air pressure (in psi or bar). If your car has this type of TPMS system, then the TPMS sensors are independent of the ABS speed sensors.

All great information. Thank you. I mistakenly thought that I’d thrown out the TPMS when I discarded the original valves.
The fact that both faults could be related is a bonus.

 

[Gbrowncls55]

there are two systems Tyre Pressure Warning System which is the basic system that warns of deflation and Tyre pressure monitoring system (TPMS) which shows the pressure in each tyre on the dash and warns if one goes outside a certain range. TPMS certainly has RF monitors in each wheel. dont know about the other.

 

[Baldbloke]

there are two systems Tyre Pressure Warning System which is the basic system that warns of deflation and Tyre pressure monitoring system (TPMS) which shows the pressure in each tyre on the dash and warns if one goes outside a certain range. TPMS certainly has RF monitors in each wheel. dont know about the other.

Thanks. My car is a 2007 E Class and I’ve never seen individual tyre pressure readings. So I’m guessing mine is the basic deflation warning type that gets its message from the ABS sensors.
Hopefully replacing the Reluctor/Impulse/ABS Ring will maybe clear the tyre pressure warning as well as the ABS fault messages.

Thank you everyone for your input!

 

[Baldbloke]

I’m busy at work over this weekend and have yet to put a Boxter’s back end back together, but hopefully will have time to repair the Mercedes and post what I discover later next week

 

[Baldbloke]

Update.

4.5 hours with a break. The old reluctant ring was in two pieces so it’s no wonder it wasn’t happy. No issues except reinstalling the linkages was a bit of a ball ache as my iCarsoft software couldn’t depressurise the rear suspension air bags. Otherwise all easy enough.

 

[Baldbloke]

Update.

4.5 hours with a break. The old reluctant ring was in two pieces so it’s no wonder it wasn’t happy. No issues except reinstalling the linkages was a bit of a ball ache as my iCarsoft software couldn’t depressurise the rear suspension air bags. Otherwise all easy enough.

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[Baldbloke]

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[Baldbloke]

An attempt at photo posting

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cleaned up in 4 minutes with a wire brush on a drill