Anfurnyy Posted June 24, 2022 Report Share Posted June 24, 2022 (edited) Hey guys, ive been looking over my pin assignments trying to get everything setup in my base map for when i get my car running. Its a 1g DSM using the Vr4Link. I recently sent the ECU in to be modified to work with Ethrottle as well as add a few other inputs. With the OEM Harness i had a fuel pressure sensor wired into the factory EGR input, which doesn't exist on the Link Ecu so i had to find another Input for it. I also was using ECMLinks Plug n Play Speed Density harness (plugs into the MAF Harness) for IAT, MAP and Flex fuel. My issue is that i think i might be tapping out my Aux Outputs. I seem to have just enough inputs, but i might be missing one output for the Ethrottle control relay. I was looking to possibly repurpose my Purge Solenoid Output (Inj 5) but the Help Section says that its unable to control Aux Outputs. I don't see any additional Ign outputs, or any additional outputs to be used that matter. I was also hoping to find one to control radiator fans as well. What are my options for getting this to work? My Current pin assignments are attached as well as a few listed here: Ethanol Sensor replacing MAF Sensor input (AN Volt 2) Throttle Pos. + --> AN Volt 7 (Green) Throttle Pos. - --> AN Volt 8 (Grey) Fuel Pressure Sensor --> AN Volt 5 (Expansion) MAP Sensor --> AN Volt 6 (Expansion) Throttle Body Pos. + --> AN Volt 9 (White) Throttle Body Pos. - --> AN Volt 10 (Brown) Isolating Relay Output (EThrottle) --> ?? Fan Control Output --> ?? Still trying to Familiarize myself with the ECU layout, so i definitely could have missed/ Not understanding stuff. Thanks! test file.pclr Edited June 24, 2022 by Anfurnyy Added information Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 24, 2022 Report Share Posted June 24, 2022 You dont need a physical pin for E-throttle relay on a plug-in that has been modified like this. You can assign any unused aux - for example Aux 16. When you convert to E-throttle you will no longer need an idle valve so that will give you 4 extra auxes (Aux 5/6/7/8) for stuff like fans. You can also use Ign 5 (purge) and Aux 2 (egr) for other functions if you are not using them for their original purpose. Quote Link to comment Share on other sites More sharing options...
Anfurnyy Posted June 25, 2022 Author Report Share Posted June 25, 2022 1 hour ago, Adamw said: You dont need a physical pin for E-throttle relay on a plug-in that has been modified like this. You can assign any unused aux - for example Aux 16. When you convert to E-throttle you will no longer need an idle valve so that will give you 4 extra auxes (Aux 5/6/7/8) for stuff like fans. You can also use Ign 5 (purge) and Aux 2 (egr) for other functions if you are not using them for their original purpose. Could you explain why you dont need a physical pin? i figured youd need an output pin controlled by the ecu to turn on the relay for Aux 9 and 10? Thats really good to know about the ISC outputs, Thanks! Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 25, 2022 Report Share Posted June 25, 2022 The power supply for the E-throttle controller has all been done on board from the main ECU power supply. You just need to assign an aux to E-throttle 1 relay to make the software happy. Quote Link to comment Share on other sites More sharing options...
Anfurnyy Posted June 25, 2022 Author Report Share Posted June 25, 2022 6 hours ago, Adamw said: The power supply for the E-throttle controller has all been done on board from the main ECU power supply. You just need to assign an aux to E-throttle 1 relay to make the software happy. Ah I see. Cool well I'll set that relay output then. I think that pretty much answered everything then thanks! Quote Link to comment Share on other sites More sharing options...
Anfurnyy Posted July 1, 2022 Author Report Share Posted July 1, 2022 On 6/25/2022 at 1:36 AM, Adamw said: The power supply for the E-throttle controller has all been done on board from the main ECU power supply. You just need to assign an aux to E-throttle 1 relay to make the software happy. So After looking at the "Generic Ethrottle Wiring" Diagram built into the contents section of the PC link software, I See that Aux 9/10 both need a 14v source in to power the pins, but then also need those same Aux 9/10 to run the Power to the Throttle body Motors.. How does that work since you need to 2 Aux's for both? Does the ECU 14v drive the power to those 2 Aux's? Does this mean you actually need 4 inputs, and 2 outputs? (2 IN for Aux 9/10 Power, 2 IN for TPS in the Throttle body, and 2 OUT for Power from the ECU via Aux 9/10 to the TPS on the Throttle body? or is this all different since ive had my G4+ modified? Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 1, 2022 Report Share Posted July 1, 2022 That diagram is for a wire-in ECU which has a pin labelled "+14V Aux 9/10", this powers the H-bridge circuit inside the ecu. In you case with a plug-in ECU the power supply has all been done internally so you dont need the relay and you dont have a "+14V Aux 9/10" pin. You need Aux 9/10 outputs to drive the motor, 2 analog inputs for 2 x TPS and 2 analog inputs for 2 x pedal sensors. So 4 inputs, 2 outputs. Quote Link to comment Share on other sites More sharing options...
Anfurnyy Posted July 1, 2022 Author Report Share Posted July 1, 2022 38 minutes ago, Adamw said: That diagram is for a wire-in ECU which has a pin labelled "+14V Aux 9/10", this powers the H-bridge circuit inside the ecu. In you case with a plug-in ECU the power supply has all been done internally so you dont need the relay and you dont have a "+14V Aux 9/10" pin. You need Aux 9/10 outputs to drive the motor, 2 analog inputs for 2 x TPS and 2 analog inputs for 2 x pedal sensors. So 4 inputs, 2 outputs. Got it. Aux 9/10 will go to TPS +/- and then the other inputs to whatever I set them in Pc Link. Thanks! Quote Link to comment Share on other sites More sharing options...
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