Speedo not working, need help locating the sensor

[irishkeet]

Hi
I bought my Polo a few weeks ago and the sppedo is not working.
Im told it may be a faulty/loose sensor connection, but I cant locate the sensor.
Im told its on the gearbox but the photo in the haynes is so small and dark Its not much help
Can anyone post up a photo of their sensor and where it is.

Also the temp gauge is a bit erratic but I have located the green temp sensor to replace.

thanks a lot in advance
irishkeet

[alexperkins]

I think its on the back side of the box (closest to the firewall) on the top mate

[irishkeet]

I think its on the back side of the box (closest to the firewall) on the top mate

lol
what or where is the firewall
maybe it will help if I put up a few pics of my engine tomorrow and someone can point it out

cheers
irishkeet

[alexperkins]

Its the fabricy thing at the back of the engine - its a heatshield for the interior basically

[irishkeet]

thanks again for your help alex

I had a look again this morning and managed to locate the sensor.
Took it out and cleaned the contacts but the gauge still wont work
Dont think its the earth as all the other gauges are OK

Part number 357 919 149
I called euro & gsf who dont have it, cant get through to VW, any other ideas on locating it?
Here are some photos which will hopefully help others as the haynes phot is pants...





cheers
irishkeet

[alexperkins]

your not missing a wire are you - its a 3 pin plug with only two connected?

[alexperkins]

And thats the right part number you have there for it - its gonna be a VW dealer replacement jobby too

edit: You are missing a wire on that. You should have a black/grey, white/blue and a brown wire going into that plug. It looks as though the brown (earth) is missing - have a look back up the loom and see if its dangling somewhere.

[irishkeet]

And thats the right part number you have there for it - its gonna be a VW dealer replacement jobby too

edit: You are missing a wire on that. You should have a black/grey, white/blue and a brown wire going into that plug. It looks as though the brown (earth) is missing - have a look back up the loom and see if its dangling somewhere.

hi
sorry no the photo of the plug is hiding the brown wire but if you look again at the photo its just visible
i guess its a new sensor from VW, ill update the post when I get it.
cheers
keet

[irishkeet]

Just ordered for collection on Wed - £22.68

[irishkeet]

well got the part & fitted it and still no working speedo
any ideas?
I traced the wires which seem to join up with others and earth under the battery holder

Im stumped now! May be a loose wire behind the clocks?

irishkeet

[alexperkins]

does your fuel guage work?

[irishkeet]

does your fuel guage work?

yep fuel gauge is fine
temp is a bit erratic but i also got a sensor to fit for that

[alexperkins]

hmm it sounds like a ground fault somewhere for sure. Can you get it plugged into vagcom and check instruments?

[irishkeet]

hmm it sounds like a ground fault somewhere for sure. Can you get it plugged into vagcom and check instruments?

Hi
I did plug it in with the free version and the only fault that came up was the coolant temp sensor for which I have a replacement to fit
might try it again and see whats going on
also the connector has a lot of grease on it maybe the wires are not making a good connection

[alexperkins]

you need to plug it in and loads the instruments group (not engine 01) and check for fault codes as these have their own diagnostics.