Atroxx3SGTE Posted September 10, 2022 Report Share Posted September 10, 2022 Hi, im confused about the different ground signals on the ECU PinOut: PIN 1 / 14 : Ground PIN 23 : Ground (G-) PIN 26 / 46 : Ground (Signal) EXT.PIN 1 : Ground (Signal) what is the difference ? If i measure it out, it seems to be connected internaly ?? is this right ? Quote Link to comment Share on other sites More sharing options...
Atroxx3SGTE Posted September 10, 2022 Author Report Share Posted September 10, 2022 2nd question to the PinOut: Has PIN 61 (+12V constant) any function ? Ist this an Input or Output Voltage ?? Quote Link to comment Share on other sites More sharing options...
essb00 Posted September 10, 2022 Report Share Posted September 10, 2022 PIN 1 / 14 : Ground --- Power Ground PIN 23 : Ground (G-) -- distributor signal (NE & G1) ground (internally connected with sensor grounds as well) PIN 26 / 46 : Ground (Signal) -- sensor ground EXT.PIN 1 : Ground (Signal) -- sensor ground PIN 61 : nc (+12V constant) -- for volatile memory retention of stock ECU (stored diagnostics error codes, idle base position, etc.), no use with Link plug-in that's why it is nc (not connected internally). Quote Link to comment Share on other sites More sharing options...
Atroxx3SGTE Posted September 10, 2022 Author Report Share Posted September 10, 2022 Thank you for the reply. But why is 1 & 14 called Power Ground and 26/46 Signal Groung, if its the same Potential, internal connected ?? I ask because i made a complete new wiring and splittet complete all signals from power sources ground to get cleaner signals.. And now i see, thats its not possible, because everything is bridged internal ? Quote Link to comment Share on other sites More sharing options...
aerace_fab Posted September 10, 2022 Report Share Posted September 10, 2022 4 hours ago, Atroxx3SGTE said: Thank you for the reply. But why is 1 & 14 called Power Ground and 26/46 Signal Groung, if its the same Potential, internal connected ?? I ask because i made a complete new wiring and splittet complete all signals from power sources ground to get cleaner signals.. And now i see, thats its not possible, because everything is bridged internal ? power ground would be engine block ground, signal ground is your sensor ground for items such as tps, map, iat , coolant temp etc... Quote Link to comment Share on other sites More sharing options...
essb00 Posted September 10, 2022 Report Share Posted September 10, 2022 Very important: Only connect the power ground to engine block/cylinder head. Do not connect the signal ground to engine block/cylinder head/chassis ground. Sensor ground is only for sensor return (as already mentioned above). Although you can measure continuity from sensor ground to power ground, the sensor ground is actually isolated internally in order to minimize ground loop noise/interference that can cause sensor reading errors. Quote Link to comment Share on other sites More sharing options...
Atroxx3SGTE Posted September 11, 2022 Author Report Share Posted September 11, 2022 Hey and thanks for the explanation. That’s how I already did it. Was just wondering now, as I tested my build, that I have connection between PowerGround and SensorGround and figured out that in the ecu is the „bridge“. But than it seems to be ok like this. Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 11, 2022 Report Share Posted September 11, 2022 This is normal, they are effectively connected to the same plane in the ecu but it is how they are routed and what current goes though them that is different. Atroxx3SGTE 1 Quote Link to comment Share on other sites More sharing options...
Atroxx3SGTE Posted September 17, 2022 Author Report Share Posted September 17, 2022 Thank you all, thats so amazing to have a community like this... an its a great ecu!! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.