1998 ucf20r tacho

[bilby]

Hello, My tacho just stopped working for no apparent reason, Any thoughts would be greatly appreciated
thanks Bill

 

[bilby]

hello, strange as it may seem tacho now working, but sometimes stops?
must be loose connection. Any ideas where to find connection to motor?

 

[samsdad]

Multimeter with long leads. on one of the ignitors one plug has one more wire than the other. The extra wire is the tacho signal. Remove the instrument cluster and probe the plugs till you find the other end (black wire) and check for cotinuity. If that's ok the PCB on the back of the Tacho itself is probably a little sad. I have a UCF21 cluster left over from a halfcut if you need one (has 180km speedo being from a Celsior) and this is known to be working. Yours for some beers of my choice and postage costs

 

[bilby]

Hello samsdad,
Sorry I should have clarified it a bit better, mine is VVT-I model so has individual coils

 

[samsdad]

Aha... Tacho input is from ECU then. Remove cluster and strip and look for burnt tracks on the tacho. If you can't repair or bridge the tracks on it Asiat instruments are who you need to contact

 

[bilby]

samsdad thanks for info will check and let you know

 

[Richard Neilsen]

Common problem with this model. I am on my third cluster. The speedo will stop working next and the temp gauge will show overheating. Spent a lot of money on cooling system, only to find out it was a faulty cluster. Lexus quoted $4000-$7000 to repair or A lot more to replace. My car is now the proud owner of a Japanese cluster which goes to 160kph and has an artistic looking trip computer. The cluster is easy to change yourself (have found instructions).