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A note re: 12-pin TSMs

As stated up there somewhere in the previous 11 pages, this is an 18-pin module. I have had a couple of requests to build a 12-pin version, as fitted to earlier models. The 12-pin TSM version uses an external flasher module to do the 60-120 flashes per minute, and that TSM's connector is mounted 'upside down' compared to the 18-pin TSM. If someone is keen on organising a 'crowd-funded' type of system to cover the non-recurring engineering charges then I will be happy to proceed.

The design weakness with the 12-pin TSM is that the vehicle speed sensor (VSS) signal is fed directly into the AVR microcontroller. If a high-voltage pulse enters the box and zaps the AVR chip then its internal diodes can rupture, if that's the correct term. The net result is that 5 volts fed into the AVR can leak out of the VSS pin. This leakage current may be sufficient to back-drive the engine's ECU therefore the engine could carry on running even with the ignition switch off and the key removed!

I can prove that if someone sends me a known defective module.

Release notes for the 18-pin TSM-2...

18-pin TSM2 Release Notes S/W V1.00, 24th August 2021/15th November 2021

Some useful information.

H&S information:

Do not dispose of unwanted TSMs in household rubbish. The TSM-2 is built with lead-free solder.
The speed of flashing is nominally 90 per minute, in the centre of the MOT's 60-120 requirement.



Features:

When the ignition is switched on, the dashboard's hazard warning lamp should briefly flash.

Normally you will see 1, 2 or 3 flashes, which indicates the Autocancel timeout index value stored in
non-volatile memory as follows:

flashes timeout
1 7 seconds (default)
2 14 seconds
3 [quote][/quote] OFF (i.e. no timeout)

It is easy for the owner to alter this to suit their preference. See Appendix 1.

The vehicle speed above which the timeout is active is very slightly faster than with the original TSM S/W V4.04.

The battery condition indicator is only activated by pressing the hazards button in the correct sequence:

1 Headlamps OFF, Hazards OFF, indicators neutral.
2 Switch Ignition on
3 Wait for about 1 second and then press the Hazards button
4 After another 2 seconds or so release the Hazards button, and within 10 seconds of ignition on.
5 The engine may be started if wished during this 10 second period.

After 10 seconds have elapsed from ignition on, the hazard lamp will show two groups of flashes.
Each flash indicates one volt. The first group is the minimum voltage detected during 10 seconds, the
second group is the maximum. If the car's engine is started during the first 10 seconds then the
high crank current will drop the battery's voltage. Low voltages indicate a potential problem with
battery condition. The high voltage should be about 14 if the alternator and battery are good.



Appendix 1.

Procedure to alter the Autocancel timeout.

1 Headlamps OFF, Hazards OFF, indicators neutral.
2 Switch Ignition on
3 Wait for about 1 second and then press the Hazards button
4 To increase the timeout, indicate LEFT then cancel the indicator. This will increment the timeout index
thus changing 7 seconds to 14, or 14 seconds to OFF.
5 Another indication LEFT then cancel will increment the index again, if possible, thus two LEFT
indications will change the timout from 7 seconds to OFF.
6 Release the hazards button within 10 seconds of ignition on.
7 You should see 5 very brief flashes on the hazard lamp after a few seconds. This indicates that
the new value has been stored in memory.


To decrement the index, use the RIGHT indicator in the same manner.
This will change OFF to 14 to 7 seconds.

If you switch the ignition off and on again, you should see 1, 2 or 3 flashes so you can tell the
autocancel timeout.

A.N.other note that readers may find interesting, forwarded from my friends at MAG-UK...(please feel free to forward to your mates)

https://www.gov.uk/government/consu...ing-vehicle-standards#tackling-tampering

There is a consultation period open which ends very soon. They are trying to ban anything that has an effect on emissions (fair enough!) but speed and indicators are on their list. They state that the idea is not to prevent owners repairing and restoring classic vehicles, but if the letter of the law does not specifically state that, then one could be on dodgy legal ground changing the TSM.

If you get an idle moment please comment and/or let your MP know your thoughts. Personally, I wouldn't object if the new legislation applies only to fully-autonomous vehicles.

Very Interesting. Without a clear definition of what constitutes a 'tamper' in the eyes of the law, I think it is very difficult to comment.
Now what would be criminal is if it were to apply to mods like Phil Bleazeys, which greatly improve the original product, and are safe, within what constitutes safe for this car.

It mentions a proposal to limit the number of recalls on a vehicle.
Morgan seems to comply with that already, declining to acknowledge clear faults in design and manufacture.

As requested by Alister here is the location of the TSM, below the fuse holder under the ECU. You need to remove the interior trim piece below the dash to gain access to the nuts with an Allen key engine side, bit of a fiddle! There is a little clip to push in to remove wiring plug. I used small o rings to retain the bolts in the TSM when reinstalling as they are obscured by the wiring loom.
Mine is set to 14 seconds which was one flash of the hazard warning light on the dash not two. So far so good and has got rid of the major irritation of the indicators canceling too early.

Thanks for reminding me: there is a clip that prevents the connector falling out of the TSM. A button in the centre of one side has to be pressed in to allow removal of the cable socket.

Alister has written an article for the Morgan Three Wheeler Club Bulletin magazine, a version of which should appear in the next edition. For the full version, complete with circuit diagrams and photos, as well as information on the development that went into producing this small but vital little box, have a look on this link. I think we are very lucky to have people that can do this sort of work for M3W owners, without it the future could be very difficult. Alister has said he is happy for it to be viewed by all.

https://www.dropbox.com/sh/y79vhnoekis07fl/AAAhqYLgipcAbzaCmErXshFra?dl=0

AGREE...AGREE...AGREE!

Hear, hear!

I think it's fair to say that M3W ownership would prove impractical for many of us without the likes of Alister and this forum who's generous contributions make it possible.
My gratitude!