My5t3ryM4nN Posted January 11 Report Share Posted January 11 Hi All, Hopefully this is the final post about this e36 PnP install (so far so good). I had a couple questions just for my own curiosity/confirmation. (sorry ahead of time) Pins 11, 14, 60, 66, 87, 88 are "nc" These are no longer useable due to the Link not supporting that function or my harness not having the pin. Am I correct to assume that? Pins 8, 36, 38 46, 47, 48 are "AUX" I've seen discussions back and forth on here regarding which pin would be best for the boost mac valve, I wanted to use pin 36 "Ignition 8 (AUX)" "purge solenoid" since it already had a switched 12V paired with it. Is this a good pin to use or would there be a better PIN to use from the list above? Once I have a home for the mac valve, I'll use two of the remaining PINs to trigger my FAN relay and Oil scavenge pump relay. I'll use a high side output to both relays, ground will be a generic chassis ground. Pins 13, 41 are "AnVolt" Both are spare inputs for additional pressure sensors of my choosing in the future. 5V and GND would be pulled from Pins 59 and 44 respectively. Pins 57, 64, 65, 81 are "DI" Spare digital inputs for switches and etc. of my choosing in the future. 5V and GND would be pulled from Pins 59 and 44 respectively. Pin 40 It's listed as a ground for the (O2) sensor, Is this pin just an "Aux" ? Can this Pin be used for anything else? Pin 26 It's listed as "nc (Constant 12V)", what's the purpose of this Pin? I've attached a PDF with the factory DME pinout, Link pinout, and my current "As-built" pinout for reference. Thanks for any feedback, sorry for the overload of info haha.. E36 ECU Pinout.pdf Quote Link to comment Share on other sites More sharing options...
My5t3ryM4nN Posted January 16 Author Report Share Posted January 16 Bump, just wanted final input in regards to the best pin for the Mac valve. I ended up using pin 36 to trigger my fan relay, so is there any preference on which pin for the mac valve? Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 16 Report Share Posted January 16 On 1/12/2024 at 12:24 PM, My5t3ryM4nN said: Pins 11, 14, 60, 66, 87, 88 are "nc" These are no longer useable due to the Link not supporting that function or my harness not having the pin. Am I correct to assume that? Correct, except pin 11 has the same function as factory. On 1/12/2024 at 12:24 PM, My5t3ryM4nN said: Pins 8, 36, 38 46, 47, 48 are "AUX" I've seen discussions back and forth on here regarding which pin would be best for the boost mac valve Aux 7/Pin11 will be best for the boost valve. On 1/12/2024 at 12:24 PM, My5t3ryM4nN said: Pins 13, 41 are "AnVolt" Both are spare inputs for additional pressure sensors of my choosing in the future. 5V and GND would be pulled from Pins 59 and 44 respectively. Correct, or the expansion loom. On 1/12/2024 at 12:24 PM, My5t3ryM4nN said: Pins 57, 64, 65, 81 are "DI" Spare digital inputs for switches and etc. of my choosing in the future. 5V and GND would be pulled from Pins 59 and 44 respectively. Correct, although a DI typically doest need 5V or sensor gnd. Connect switch to any chassis ground or 12V is fine. On 1/12/2024 at 12:24 PM, My5t3ryM4nN said: Pin 40 It's listed as a ground for the (O2) sensor, Is this pin just an "Aux" ? Can this Pin be used for anything else? It is a sensor ground. On 1/12/2024 at 12:24 PM, My5t3ryM4nN said: Pin 26 It's listed as "nc (Constant 12V)", what's the purpose of this Pin? Our ECU doesnt use it, the factory ecu would use it to retain "memory", so things like fault codes and long term O2 trims can be cleared by disconnecting the battery. Quote Link to comment Share on other sites More sharing options...
My5t3ryM4nN Posted January 17 Author Report Share Posted January 17 8 hours ago, Adamw said: Correct, except pin 11 has the same function as factory. Aux 7/Pin11 will be best for the boost valve. Sadly I don't have Aux7/Pin11 on my harness with it being a manual car. I only have Pins 8, 38 46, 47, 48. Thanks for the follow up! It's greatly appreciated. Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 17 Report Share Posted January 17 46 would be the most appropriate of those. Quote Link to comment Share on other sites More sharing options...
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