James c Posted September 14, 2019 Report Share Posted September 14, 2019 Hi I'm adding a 3 Bar MAP Sensor to my existing Link atom ECU but have a few questions. The car is currently using the +5V Power out for the TPS sensor. I want to retain the TPS as the vehicle is running individual throttle bodies. As the Atom only has one +5v Output how can I supply +5v to both sensors? The MAP sensor requires a ground. Does this need to run back to the ECU or can I ground to a suitable spot on the engine block for example? I have a spare 0 to 5Volt analog input on the ECU so I can just run the sensor signal OUT into this and configure the ECU to suit? Thanks Quote Link to comment Share on other sites More sharing options...
Richard Hill Posted September 14, 2019 Report Share Posted September 14, 2019 17 minutes ago, James c said: Hi I'm adding a 3 Bar MAP Sensor to my existing Link atom ECU but have a few questions. The car is currently using the +5V Power out for the TPS sensor. I want to retain the TPS as the vehicle is running individual throttle bodies. As the Atom only has one +5v Output how can I supply +5v to both sensors? You will need to splice into the 5 volt supply , usually near the ECU to supply a reference to any sensors The MAP sensor requires a ground. Does this need to run back to the ECU or can I ground to a suitable spot on the engine block for example? Yes, back to ECU , to a ground out pin , again you can splice into this if needed. I have a spare 0 to 5Volt analog input on the ECU so I can just run the sensor signal OUT into this and configure the ECU to suit? Yes. HTH, Richard Quote Thanks Quote Link to comment Share on other sites More sharing options...
James c Posted September 15, 2019 Author Report Share Posted September 15, 2019 Thanks for that Richard. Is there a preferred method for splicing into the wire or a connector I can use to do so? Or would you suggest I remove the ECU pin and try to crimp two wires into a new terminal pin? Quote Link to comment Share on other sites More sharing options...
Richard Hill Posted September 15, 2019 Report Share Posted September 15, 2019 I normally use an open barrel splice, like these https://uk.farnell.com/amp-te-connectivity/140723-2/terminal-wire-splice-15-5awg-crimp/dp/2972010# Depending on the thickness of the wire you're using, you might be able to double pin into the connector, but it will need to be thin wire. I have done this before but it can be tight. Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 15, 2019 Report Share Posted September 15, 2019 Something like this is typically how it is done. If you purchase a Link loom the 5V and sensor gnd would already be spliced for TPS & MAP Quote Link to comment Share on other sites More sharing options...
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