Digital Speedo Converter
£70.00+VAT
£82.25 incl
KPH ro MPH Speedo Converter
Suitable for Most Imported Vehicles
Download instructions for the following cars.....
Toyota Supra Twin Turbo MkIV (non VVTi)
Toyota Supra Twin Turbo FaceLift MkIV (non VVTi)
Toyota MR2 Turbo (For earlier mechanical/cable driven speedos see our mechanical speedo converter section)
How to fit your DSC to a Toyota Supra MkIV TT
Remove the dash
READ THIS FIRST - . If you have an airbag then do all the below with
the ignition switch off !!
(If you don't, nothing will be damaged but the airbag warning light will stay on permenantly.
This can be reset but is an extra bit of work you don't really need to do)
First you need to remove the 6 screws which hold the top part of the dash. This is the piece that contains the odometer, hazard warning lights and other warning light clusters. This should come off easily, now disconnect the connectors. Don't worry about which one goes where, they are all handed and only occur once. Pull this unit away.
Now surrounding the speedometer and tachometer is a single piece of facia dash (about 12inches long and 8 high). This is just clipped in so gently prise this off and store away.
Next you must remove the housing surrounding the gear lever. This is just clipped in. To start off begin to lift this section from the drivers side (it's the only bit you can get purchase with your fingers). Now ease the section out of the clips. Stop before removing totally because you first have to un-velcro the leather that surrounds the gear lever. This allows the leather collar to slip over the gear lever. Finally before the whole thing will come out you wil need to disconnect the cable attached to the rear of this small section. It's a bit fiddly as there isn't much slack cable.
Now you are in a position to remove either the left or right dash sections. You'll need the left one obviously to get at the radio.
Once these are removed the section will again come away by carefully easing around all the edges. Once free of the clips it now becomes obvious that you have a lot of cables to disconnect. Just start at the top and work your way down (pull the connector and not the cables to be sure you don't fracture the wires) All the connectors are handed, so just pull them off without worrying where they came from, they won't go back any where else. Finally with all cables removed the dash section should come away.(avoiding the steering column with a bit of patience)
Follow the reverse to the procedure and your back up and running.
Remove the speedo head
Remove the BLUE connector, C13, from the far left of the speedo head
Locate the 5th pin, it's the BLUE WIRE with RED STRIPE and SILVER BANDS. Leave yourself plenty of wire to work with at the connector end and CUT this wire.
(That is the main speed signal from Speed Sensor No.1)
Connect the INPUT terminal of your speedo conversion unit to the wire on the harness/loom side (not the connector side)
Connect the OUTPUT terminal of the conversion unit to the wire stub left
connected to the connector.
(That's the speedo signal bit sorted!)
Now you need power.
12V for the conversion unit can be found on pin 4. Splice a connector onto this wire and 'T' off for the power to the converter.
0V can be sourced from any chassis point. There's one just behind the speedo
head, a screw.
Odometer
Remove connector T7, this is the one connected to the far left next to the hazard warning light switch and should already have been removed to do the above.
Locate pin 5, again a BLUE WIRE with RED STRIPE and SILVER BANDS.
(This is exactly the same as the speedo head wire but we need to modify it
because the signal from speed sensor No.1 is 'T'd earlier on in the wiring
loom and so the speedo mod will not affect it.)
Again make sure you have enough wire left over at the connector end and CUT
the wire.
Now connect a NEW piece of wire from the output of the speedo converter to
the wire stub of the connector T7.
Now the speedo' and odo' will measure speed in MPH and not KPH.
You may now ask the question - 'But how do I get the odometer to display MILES and not Km?' - you'll need to look at this
Final Notes:
The DSC provides calibrated outputs adjustable by +/-10% in approx 1.5% increments. It also provides a 1:1 and 5:8 scaled output signals.
