Andrew Cleland Posted February 3, 2010 Share Posted February 3, 2010 As the subject really - does anyone know if the td5 electronic speedo can be driven by the speed transducer fitted to a Range Rover Classic with a 3.9i V8 - it's the unit which tells the Lucas injection computer (14CUX) that the vehicle is moving (AMR3386)? Alternatively would the td5 Defender speedo transducer hook-up to the 14CUX to do the same? Thanks, Andrew. Quote Link to comment Share on other sites More sharing options...
Aragorn Posted February 3, 2010 Share Posted February 3, 2010 The TD5 speedo has an output which normally gets sent to the TD5 engine management unit, containing the speed signal. It would depend on the frequency of the signal as to whether it was compatible, but you might find it will work, even if its not exactly the same frequency. The workshop manual says the output is double that of the input, from memory input from the transducer is 4000pulses per mile and the output to the ECU is 8000. Quote Link to comment Share on other sites More sharing options...
player Posted October 16, 2013 Share Posted October 16, 2013 Hi, Iam interesting to do the same modification, has anybody connect the td5 speedo with Lukas speed transduser? Thank's Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted October 16, 2013 Share Posted October 16, 2013 The TD5 speedo runs at exactly 4100 pulses per mile. What does the output of your speed transducer 'look' like? Levels and frequency etc Quote Link to comment Share on other sites More sharing options...
player Posted October 17, 2013 Share Posted October 17, 2013 The TD5 speedo runs at exactly 4100 pulses per mile. What does the output of your speed transducer 'look' like? Levels and frequency etc Hi, i don't know anything of the specs of the 14cux transduser.. sorry, but it looks like this one. https://www.google.com/search?q=AMR3386&rls=com.microsoft:el:%7Breferrer:source%3F%7D&rlz=1I7SKPB_el&source=lnms&tbm=isch&sa=X&ei=3KxfUs3zH4vGtAae7ICACw&ved=0CAkQ_AUoAQ&biw=1280&bih=671#facrc=_&imgdii=_&imgrc=OYCD6W9f3PUIwM%3A%3Bgp3OZwXIp5zvrM%3Bhttp%253A%252F%252Fwww.bputah.com%252FParts%252FLand_Range_Rover_Discovery_Defender_Speed_Sensor_AMR3386.jpg%3Bhttp%253A%252F%252Fwww.bputah.com%252FParts%252FLand_Range_Rover_Discovery_Defender_Vehicle_Speed_Sensor.html%3B504%3B448 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted October 17, 2013 Share Posted October 17, 2013 That has 4 pulses per revolution. Don't know what that equates to in pulses per mile though. Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted October 17, 2013 Share Posted October 17, 2013 The defender transducer also does 4 pulse per revolution whereas the disco one does 8 Quote Link to comment Share on other sites More sharing options...
player Posted October 17, 2013 Share Posted October 17, 2013 I think i must try to connect it, i don't think anything be damaged. What you say??? Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted October 17, 2013 Share Posted October 17, 2013 Well I've tested a number of the defender speedos by feeding them with a 12v square wave without problems. If you wire up yours it won't put more than 12v's in to the speedo so that will be fine and if it did run at too fast a speed it won't damage it, the reading will just be wrong, if you run it way to fast all that happens is the speedo stops responding till you get the speed back down to a sensible range. Quote Link to comment Share on other sites More sharing options...
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