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As the UK's leading supplier of replacement commercial vehicle transmissions parts, H L Smith have a wealth of information about parts and maintenance of your commercial vehicles.
If you have a problem you need to resolve, try our FAQs. If you can't find what you're looking for, please contact us and we'll get back to you as soon as we can.
Electronic Control Units
What if my ECU doesn't work
There are some checks you can carry out if you get a fault with an automated gearbox, such as checking all the connectors and electronic plugs fitted to the gearbox. Make sure they are all clean and not damaged in any way. Get these faults fixed first as they will have an influence on how the gearbox performs.
If there is still a fault, then contact us and we can send out one of our mobile engineers to do an in depth check. For more information on ECU's and our services, see the Electronic Diagnostics page
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