TPMS lamp

I think it's safe to say that the flashing TPMS light is the only safe option to warrant a fail as far as the manual is concerned, I have learnt from the discussions presented on this thread that it is the only reliable option that would be the correct choice.
I do live in hope that a solid light which would include tyre pressures that could be substantially unbalanced one day becoming more important than a numberplate lamp when vehicle handling braking , increased emissions and death are just a few of the results of ignoring the latter.
Until then I propose to either refuse to test or at least to not conduct a brake test until the warning light, tyre condition is investigated and/or extinguished .
I hope to see testing advice in the future relating to the range of different TPMS warning sequences that we could come across on different makes and models from within the testing service to allow us to make informed decisions.
DRW you present some interesting points and your thoughts are aligned with mine in many ways however perhaps it is better to concede and live in hope of an improvement and better clarity of the systems we examine on a daily basis.
Let's get back to guessing the photo and chill until the next controversial subject raises itself for discussion.

I know the basics of how TPMS works

Fact is better than perspective. Read below;

TyreSafe has aired its concern at the implication for road safety of skyrocketing MoT failure rates caused by defects with vehicles’ Tyre Pressure Monitoring Systems (TPMS). More than 23,000 vehicles required a retest following identification of TPMS issues in 2016 compared with a little over 7000 in 2015* – an enormous rise of 212%.

TPMS became mandatory on all new passenger vehicles sold after 1 November 2014 as a safety feature to help reduce the number of vehicles being driven with tyre pressures significantly – even dangerously – below the recommended settings. Such vehicles are not only more difficult to control, increasing the risk of an incident, but also consume more fuel and wear their tyres out more quickly. TPMS notifies the driver to a variance in tyre pressure by illuminating a warning light on the dashboard and, in some cases, sounding an audible alert thereby offering motorists the opportunity to rectify the issue.

If drivers do not see the TPMS alert come on with all other warning lights when they start their vehicle, they should immediately check with their service garage that the system is functioning properly.

As of 1 January 2015, all vehicles first used after 1 January 2012 and equipped with a TPMS by the manufacturer must have a functioning system to pass its MoT. TyreSafe had expected the widespread introduction of this technology to lead to an increase in MoT failures in 2016 as more cars were equipped with these systems. However, the startling rise in failures due to TPMS defects – more than treble – was unexpected.

Stuart Jackson, TyreSafe chairman, said: “TPMS adds significantly to general tyre safety making it easy for the driver to know if their pressures aren’t at the right level when out on the road. But, clearly, even though Britain’s motorists are being warned there’s a safety issue they’re choosing to ignore it. Regrettably, this leap in MoT failures due to TPMS defects underlines that a poor attitude to tyre safety is not an issue exclusively associated with older vehicles.

“TyreSafe urges motorists to put tyre safety higher up their list of driving priorities and check their tyres and TPMS are in roadworthy condition.”

TPMS helps to reduce the number of tyre-related incidents but drivers should carry out regular visual checks on at least a monthly basis and before long journeys as the system will not inform them of tread depth or tyre condition. Visit tyresafe.org for more information.

*Source: Driver & Vehicle Standards Agency

This article was posted on 6th March 2017 in Latest News and tagged: part worn, safety check, TPMS, tyre pressure, tyres

Source: www.tyresafe.org/media-centre/latest-news/concerning-rise-mot-failures-due-defects-tyre-safety-system/

Most TPMS in use on modern vehicles across Europe have adopted the new, far cheaper to manufacture, iTPMS.

All iTPMS require re-activation of some sort once the warning lamp has been illuminated.

My point being, many iTPMS don't flash then illuminate. They just illuminate.

aint that basically what I said at the start of all this?can we agree to differ and move on?must be more interesting stuff to debate.