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The mkiv Supra Owners Club

R154 box to supra mkiv help please


crispy

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Hi guys

 

After having my car messed around with by little matt last year just before blackies bad luck !!!!!

The car is now in a state where i can finally drive it, :) bar just afew issues!

 

i had a tt conversion and R154 box fitted by little matt (using the word "fitted and working" loosly lol) any way now having it back and doing abit of research we sourced from america the correct speedo drive which is mechanical and then a box of tricks from marlin crawler to convert mechanical drive to digital on the mkiv dash but having my luck !!! we plugged it all together hoping it would just work but not the case !!!! nothing :( It has power but thats about all i can tell you, im no mechanic or auto electrician so dont realy know where to turn now any help or advice from people that may have undertaken this conversion would be magic, chers all Chris.

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hi mate like i said im no electrician lol, wat do you mean buzz out the + & - sigs to the ecu ? and wat will this tell me ? chers

 

There should be a +5v feed to it, a VSS+, a VSS- and a ground. You can buzz out the + and - VSS sig's to the ecu connector.
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hi mate like i said im no electrician lol, wat do you mean buzz out the + & - sigs to the ecu ? and wat will this tell me ? chers

,

 

Buzz out means test with a multimeter. Check there's a 5v to one pin (ignition on), check there is a good ground too. As for the VSS +&-, pull the body connector out in the passengers footwell (big orange one), find out what pins the vss is on and check continuity between the sensor plug and the chassis plug.

 

Sorry I've not got the pin outs here, it's hard enough writing this whilst driving.

 

Ben

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