Tacho not working on 2006 landcruiser. need a wiring diagram

Outside chance there is a wiring fault or the engine management ECU has developed a fault but most likely the tacho is defective and needs replacing. You need a guy to check it with an oscilloscope before you start spending money needlessly.

check for a faulty wire/s to the tacho of a faulty tacho unit
the tacho gets its reading by the ignition impulses so any engine running problems may have been a result of the faulty tacho or wires.

That's easy to run a tach u will need to run a wire to the coil pack plug it to any cylinder which there are 4 any one will work then to the tach

auto diagnostic tool

on a chevy carb engine you only need to run a switched 12 volt to the distributor.

We had tacho installation problem with out 98 lancer with no tacho on the panel. we got a aftermarket one but when we had to wiring it up it needed a tacho signle from the ignition coil. The ignition coil is built into the distributor which made it hard. The 2002 is the same distributor setup as the 98 so you can get step by step instructions with diagrams and pictures from my page, you will see an link that says Mitsubishi Tacho installation. website is www.sureyya.biz let me know if you find it useful.

Goodluck

How many wires 1 ,3 or 4 and colours on lambda sensor? on most lambda sensors the Black wire is the sender wire but on yours I`m sure its blue ,as for the tacho gauge you need a wiring diagram for the ECU as you need to connect it there or pull the dash clocks out (carefully)

www.autozone.com has free online repair manual and is free to register Just follow the plug wire. What plug wire did you have it on? Should have it on #1 cylinder wire.

This site offers the manual for your car as a download for $9 US which is about half the cost of hardcopy from Haynes or Chilton: 
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I've always found having the manual for any car is my first priority when buying a new horse for the stable; they always pay you back.  

i had the same problem on my g/f's 2000 lancer GLXi, (with tacho),
i fixed the problem by putting a jump wire on the back of the instrument cluster,
the fault was in the wiring to the tacho part & i drew up my own wiring diagrams for the cluster unit,
then traced the fault,
looking @ the back of the cluster unit, the top right hand screw for the speedometer,,, follow the track on the circuit-board, there is a link wire UNDER the board (there is a dotted line on top where it goes, i think its the left 1,,, there is 2) this track then goes to the bottom left screw on the tacho,,,
i soldered a small gauge wire from the bottom of the link solder joint (MAKE SURE ITS THE CORRECT LINK, THERE IS 2 SIDE BY SIDE) to the bottom right track on the vertical plug socket (its common pos for the warning lights) this is where the "MIRAGE" & other "CE LANCER" (without tacho) gets its speedometer & gauges power from,

kind regards waz
if anyone needs a photo i will pull out the dash again lol its only 6 screws