peugeot 406 speedo

studsmassive · Unread post by **studsmassive** » 12 Jan 2011, 14:20

hi there i have took car down road but the speedo is not working any ideas please
darren

panason1c · Unread post by **panason1c** » 12 Jan 2011, 15:54

If the odometer isnt working either its probably the sender unit faulty

Unread post by **CitroJim** » 12 Jan 2011, 16:18

If you're near a Lexia/DIAG owner then a quick diagnostics session wil determine the health of the sender.

It's always worth checking the sender connector. It's in a bit of an exposed position, just above the gearbox final drive housing adjacent to the RH driveshaft.

spider · Unread post by **spider** » 12 Jan 2011, 17:20

It is usually the sensor as Jim says, its not very well protected against the elements.

I do seem to recall there's a box on the passenger side around the back of the glovebox area that has something to do with this as well...

Unread post by **CitroJim** » 12 Jan 2011, 18:08

spider wrote: I do seem to recall there's a box on the passenger side around the back of the glovebox area that has something to do with this as well...

Andy, yes, I know the box you speak of. I believe though, and I might be way off here, that the box is only fitted to the 406 Executive and SRi with the 2.0 TCT engine and the V6s...

spider · Unread post by **spider** » 12 Jan 2011, 18:28

I do recall it being replaced on a few models, but not quite sure what. I do know it was the 'second' substitution item for a broken speedo (sensor on transmission first, then this box)

Actually Jim, thinking about it again, would it be the sensor for the speed sensitive steering ? (not having driven a Xantia for a long time I am not sure) , but the early pre 98 2.1 406's and the V6's had ultra, ultra light steering at very low speed, certainly compared to the other models in the range. I think its partly the control for that. The 2.1's did away with it after about 18 months I think. The PAS pump was different on 97 to 98 models too, different pressure and different rack.

Unread post by **CitroJim** » 12 Jan 2011, 18:37

Thanks for that very valuable information Andy

I must check my lad's 2.1TD 406 although his is likely to be too late for it. So It could well be that box then. I do know that they are reckoned to be very prone to failure and prized greatly when found in a scrapyard.

They're available from dealers as a spare part and were not that expensive a couple of years ago: £45 or so...

studsmassive · Unread post by **studsmassive** » 12 Jan 2011, 22:19

thanks guys for all info i will check the speed sensor in the gearbox tomoz and will let you know
darren

Oldpug · Unread post by **Oldpug** » 13 Jan 2011, 15:42

The easy way to find out if it has a "black box" (speedo interface) is look at the gear box speed sensor plug,two wires it has one,three wires it has not.It`s always the sensor at fault.

Unread post by **CitroJim** » 13 Jan 2011, 15:49

Oldpug wrote:,two wires it has one,three wires it has not.

Ahh thanks Oldpug

That explains the two pin sensor I have on a gearbox rescued from a 406 V6...

If you need one Studsmassive, I therefore have one and no real use to me...

studsmassive · Unread post by **studsmassive** » 13 Jan 2011, 21:23

hi there i checked the sensor and its not working so i am indeed after one jim thanks
darren