Does this work on all TD5 ECUs?

[happen-studio]

Is there a limitation based on the year of manufacture?
As I can remember, all Defenders under 2004 don't support OBD2. Is this right?

Thanks

[Aloike]

Hi @happen-studio,

There's no limitation on the year of manufacture but on the engine management system.

Known limitations of this app:

• The ECU has to be the Lucas one for Td5 engines (it might work on other vehicles, but not recommended as not tested);
• The main problem that occurs to users is the use of a non-compatible hardware interface.

As far as I remember, the Td5 ECU doesn't support OBD2 in any of its versions, whether they are a MY98 or MY2003 Defender or Discovery. Defenders are OBD2-compliant from the Td4 engine (2006). I haven't heard of a "simple" OBD2 interface capable of interacting with a Td5.

This app is using K-line Communication defined by the ISO 14230 standard, also known as "Keyword Protocol 2000". It was in use on older German cars of the same epoch.

Hope that helps! :)

G'day!

[happen-studio]

@Aloike is this a Lucas one?

Thank you for all the info.

[Aloike]

Yes. Yours seems to be a MY2002 version.

Td5 only came with Lucas ones, although there's a variation regarding their memory: ECUs with serial number starting with MSB aren't programmable through the diagnostic socket, while the second, younger model with serial number starting with NNN do contain a Flash memory that can be modified through the diagnostic interface.

Your white tag seems to start with a cropped NNNW500190.
It looks coherent with your VIN number SALLDHM582A635417 (from what I see here yours is a LHD 110 SW Td5, EU3-compliant, manual gearbox, painted Epsom Green Micatallic, estimated to be built at Solihull around Friday 15th Mar 2002 - Noice !)

If you want to have a few more details about Lucas ECUs, here is an interesting link: https://blackbox-solutions.com/help/SM010.html

🤙

[happen-studio]

Hi @Aloike
that's fantastic, thank you so much for the research and the detailed feedback, that helped me a lot.
Have a good day.

[Aloike]

Knowledge is power, and it's meant to be shared 😉

Have a good day too, and keep rolling 🤙