Pawson6844 Posted October 3, 2021 Share Posted October 3, 2021 Thought was the wheel sensor, got a new one and still nothing. display lights up but needle doesn't move and miles don't change either. mechanic has checked wiring and confirmed sensor working. Do the gauges fail? Anything else to check. it's a 2014 360R Thanks Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 3, 2021 Member Share Posted October 3, 2021 The gauge can fail, and they are fixable: Speedometer and Instrument Repairs.But other faults are more likely.I'd start with the Speedometer Guide...1 Check the gap2 Is the little light flashing reliably?3 Are all other instruments working normally?4 Any recent work on the car? There is a Workshop Notice with improved wiring. That's described in the Guide.Jonathan Link to comment Share on other sites More sharing options...
Pawson6844 Posted October 3, 2021 Author Share Posted October 3, 2021 Yes gap is set and the sensor is reading. He says it's sending a signal to the gauge but the gauge isn't responding Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 3, 2021 Member Share Posted October 3, 2021 I can't remember the characteristics of the signal from the sensor, but the next step should be to test for that signal wherever you can get access between the sensor and the instrument.If you'd like a wiring diagram please send me a Private Message with your email address.Jonathan Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 3, 2021 Member Share Posted October 3, 2021 Or... find someone with both a similar instrument and a large dollop of helpfulness...Jonathan Link to comment Share on other sites More sharing options...
ChrisC Posted October 3, 2021 Share Posted October 3, 2021 Jonathan's guide covers all you need to know. I am confused by your wording, I assume it's from your mechanic, these sensors don't send a signal. The sensors CC use are just switches, simple on or off, hence it would be worth checking for the LED on the sensor itself, is that going on and off as the wheel rotates. Gap is always the number one suspect, it has changed with the new sensor. Beyond that, it could be a faulty pull up resistor (located behind the speedo), wiring connection between the speedo and the sensor, or as pointed out the speedo itself. The speed sensor wire can also be found in the ECU connector, although it should be isolated and not connected to the ECU, could that have been altered recently? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 3, 2021 Member Share Posted October 3, 2021 "Jonathan's guide covers all you need to know. "Thanks, but as so often, I'm only the monkey. Thanks to the organ grinders, please.: - )Jonathan Link to comment Share on other sites More sharing options...
Pawson6844 Posted October 3, 2021 Author Share Posted October 3, 2021 Hi, this could be something to do with the ecu. I've just had the premier power upgrade with a new ecu. it was working when I took it down and wasn't when I picked it up. Could be something to do with this? Link to comment Share on other sites More sharing options...
ChrisC Posted October 3, 2021 Share Posted October 3, 2021 Since I don't know what the upgrade includes, I would speak to Premier Power. Stuart will be the best to advise. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted October 3, 2021 Member Share Posted October 3, 2021 "this could be something to do with the ecu. I've just had the premier power upgrade with a new ecu. it was working when I took it down and wasn't when I picked it up. Could be something to do with this?"YesJonathan Link to comment Share on other sites More sharing options...
aerobod - near CYYC Posted October 3, 2021 Share Posted October 3, 2021 With an ECU swap, the pull-up resistor may need to be added. The original feed to the speedo and 992 ECU didn't use a pull-up resistor in the feed from the sensor that goes to both, but I had to add one when I swapped to the 9A4 ECU, as the speedo stopped working without the 1K ohm pull-up being added. Link to comment Share on other sites More sharing options...
Pawson6844 Posted October 3, 2021 Author Share Posted October 3, 2021 Thanks for this. do you have a part number for the resistor? Link to comment Share on other sites More sharing options...
aerobod - near CYYC Posted October 3, 2021 Share Posted October 3, 2021 Any commodity 0.25W 1K resistor will work, such as: https://uk.rs-online.com/web/p/through-hole-fixed-resistors/7077666 Link to comment Share on other sites More sharing options...
Pawson6844 Posted October 3, 2021 Author Share Posted October 3, 2021 Thanks Link to comment Share on other sites More sharing options...
John Vine Posted October 4, 2021 Share Posted October 4, 2021 Re #6: Chris, YHM.JV Link to comment Share on other sites More sharing options...
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