Why T Posted November 14, 2017 Share Posted November 14, 2017 Good morning guys. A while back my supra decided to die on me. The syvecs went a bit mad and now the car won’t start. Tried to clear the errors myself but they would not clear. I have sent the ecu to syvecs and they tested it which showed that it’s not the ecu. Advice? Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted November 14, 2017 Share Posted November 14, 2017 All those sensors require a sensor earth connection back to the ECU (if it works like a Link ECU). If the earth has been compromised then it will take out all the sensors that share that sensor earth circuit. So worth checking under your inlet manifold (if thats where your ECU is grounded). Otherwise, most of those sensors require a 5v output from the ECU, this could also been compromised in some way. Usually these things are a grounding issue though Quote Link to comment Share on other sites More sharing options...
Why T Posted November 14, 2017 Author Share Posted November 14, 2017 Jesus I have no idea where the grounds would be :/ Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted November 14, 2017 Share Posted November 14, 2017 Jesus I have no idea where the grounds would be :/ /QUOTE] Have you got a stock gte loom or custom one? Quote Link to comment Share on other sites More sharing options...
Why T Posted November 14, 2017 Author Share Posted November 14, 2017 I think it’s stock but apparently a lot had to be done to it when fitting the ecu. Got greddy inlet Quote Link to comment Share on other sites More sharing options...
Big Mark Posted November 14, 2017 Share Posted November 14, 2017 Anyone know if the sensors grounds go back to the Syvecs or are they usually just grounded on the body? Looks like you need a multimeter and patience Shane. Probably something simple like one wire / grounding point not right. Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted November 14, 2017 Share Posted November 14, 2017 I think it’s stock but apparently a lot had to be done to it when fitting the ecu. Got greddy inlet /QUOTE] From the greddy inlets Ive installed they usually have previsions underneath the plenum to earth wires to. So long as they haven't relocated the factory earth wires then they are probably there? If not, then maybe earth wires have been put on the intake side of the engine maybe on the head or block. Quote Link to comment Share on other sites More sharing options...
Why T Posted November 14, 2017 Author Share Posted November 14, 2017 Ok I’ll have a look when I get a chance. Thanks bud. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 16, 2017 Share Posted November 16, 2017 You do not say which Syvec ecu it runs, so download the pin outs for whichever you have and look for sensor ground pins. Check each one has perfect continuity to clean bare engine metal. Check each sensor 5V pin on its plug shows +5V relative to engine ground with the ignition in the on position. EG the Syvecs S6Plus uses pins C1nbto C7 for sensor grounds and sensor 5V supplies. Quote Link to comment Share on other sites More sharing options...
Why T Posted November 16, 2017 Author Share Posted November 16, 2017 That’s for the reply chris. But I have no idea what you just said hahaha. It is the s6gp Quote Link to comment Share on other sites More sharing options...
Big Mark Posted November 16, 2017 Share Posted November 16, 2017 (edited) http://www.syvecs.co.uk/support/product-manuals-and-pinouts/ I've downloaded an S6GP pin out sheet and filtered for everything listed as "GND" or Ground" as shown in the image. Plus just added a pin diagram. Assuming you do own a multi meter???? Edited November 16, 2017 by Big Mark pin diagram addded (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 16, 2017 Share Posted November 16, 2017 That’s for the reply chris. But I have no idea what you just said hahaha. It is the s6gp /QUOTE] With the greatest of respect if you are not confident back probing the ecu connectors and the sensors, and confident in how to set a multi meter correctly it is entirely possible to do some expensive damage. So I would get a decent auto electrician to check it, it shouldn't cost much given the info the ecu read out has provided. the fix should be quick and pretty straightforward. To back probe without damage requires needle probes or for you to make some using T pins or similar. Don't go pushing normal meter probes into sensor or ecu connectors! Quote Link to comment Share on other sites More sharing options...
Why T Posted November 28, 2017 Author Share Posted November 28, 2017 Yes you are correct chris. This is why I have yet to have a play as I am not confident with the ecu. Wouldn’t believe I built the car would you haha. But I did not fit the ecu so hesitant to back prove it. Thanks mark. That will be a help. John says we should get the car to his dads if you want to join us Quote Link to comment Share on other sites More sharing options...
Big Mark Posted November 29, 2017 Share Posted November 29, 2017 Let me know when you are off to Jon's dads. I've got his big power cable crimpers that I need to get back to him. So if I can't make and you're going down the M6 I might need to give them to you somehow. Quote Link to comment Share on other sites More sharing options...
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