r33lew Posted January 3, 2022 Report Share Posted January 3, 2022 I'm getting low battery voltage read out, (11.9v) and would like to know where my ecu gets the reading from? Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 3, 2022 Report Share Posted January 3, 2022 There are several pins all connected to the ground and 12V copper, which will all give a similar result. Use 49 or 59 for the +ve and 116 as the ground. Quote Link to comment Share on other sites More sharing options...
r33lew Posted January 3, 2022 Author Report Share Posted January 3, 2022 3 minutes ago, Adamw said: There are several pins all connected to the ground and 12V copper, which will all give a similar result. Use 49 or 59 for the +ve and 116 as the ground. would using pin 45 and 50 for a 12v+ / ground supply for a can module be a bad thing? Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 3, 2022 Report Share Posted January 3, 2022 12 minutes ago, r33lew said: would using pin 45 and 50 for a 12v+ / ground supply for a can module be a bad thing? Yes, pin 45 in R32's and R33's is already overloaded in stock form and usually significantly less than bat voltage. 50 is sensor ground so not ideal to connect a high current device to that. Quote Link to comment Share on other sites More sharing options...
r33lew Posted January 3, 2022 Author Report Share Posted January 3, 2022 11 minutes ago, Adamw said: Yes, pin 45 in R32's and R33's is already overloaded in stock form and usually significantly less than bat voltage. 50 is sensor ground so not ideal to connect a high current device to that. Okay, I've tried to wire my can lambda module to them. D***head. I wonder if this could be either the cause to my lambda errors or my running issues. Fingers crossed.. I will wire up a relay as you suggest directly from the battery and try to listen to your manuals a bit more! Thank you! Quote Link to comment Share on other sites More sharing options...
r33lew Posted January 4, 2022 Author Report Share Posted January 4, 2022 21 hours ago, Adamw said: There are several pins all connected to the ground and 12V copper, which will all give a similar result. Use 49 or 59 for the +ve and 116 as the ground. does this mean its an average taken over several pins? Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 4, 2022 Report Share Posted January 4, 2022 No. Quote Link to comment Share on other sites More sharing options...
r33lew Posted January 4, 2022 Author Report Share Posted January 4, 2022 so 25 minutes ago, Adamw said: No. so which pin or location on the car does it determine battery voltage from? Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 4, 2022 Report Share Posted January 4, 2022 56 minutes ago, r33lew said: Use 49 or 59 for the +ve and 116 as the ground. Quote Link to comment Share on other sites More sharing options...
r33lew Posted January 4, 2022 Author Report Share Posted January 4, 2022 sorry Adam, i thought i was being misunderstood, I just wasn't reading it how you meant. Thank you. Quote Link to comment Share on other sites More sharing options...
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