ECUGN Integration and hard wiring

EricM

EricM

Administrator
Staff member
Yes that can be used to activate a relay. It does not supply 12v though, it grounds the relay to activate it. So 12v goes to the relay, and ground goes to HC3 (pin 7 on the terminal strip).
 
ShaunKris

ShaunKris

Well-Known Member
EricM said:
D13 is not an input. It is labeled "not used", which means its not connected to anything. All of the inputs are listed on the "extra inputs and outputs" document that comes with the ECU on the flash drive. I will attach that here also. You need an analog input or ADC input (same thing) for a 0-5v sensor.
There is also more info on connecting a pressure sensor in this thread: https://www.turbotweaksupport.com/i...ressure-sensor-or-other-pressure-sensor.2827/

Your 100psi sensor from Caspers, do you know what it needs for power voltage? Some of their sensors need 12v power.

C2 and C1 are ok for 5v and ground, but I would likely power some of the 5v sensors using the terminal stripe on the side of the ECU. (pin 8 for 5v, and pin 11 and 12 for ground), for easier wiring.

Yes 2.4k is normal for the pullup resistor when using temp sensors with the GM calibration. The resistor would connect between 5v and your signal wire from the sensor. There could be other sensors that would need a different resistor.
Click to expand...
Ok, I'll move it. Yes you are right it is 12v supply and 5v sig out part#107105, I am going to change that. 2.4k ok, so I would solder one end to 5v and the other to the signal wire. ok.
 
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ShaunKris

ShaunKris

Well-Known Member
EricM said:
Yes that can be used to activate a relay. It does not supply 12v though, it grounds the relay to activate it. So 12v goes to the relay, and ground goes to HC3 (pin 7 on the terminal strip).
Click to expand...
lol, that was not intuitive for me since it said output instead of 12v ground. I guess I have to rewire the circuit.
 
ShaunKris

ShaunKris

Well-Known Member
EricM said:
Yes that can be used to activate a relay. It does not supply 12v though, it grounds the relay to activate it. So 12v goes to the relay, and ground goes to HC3 (pin 7 on the terminal strip).
Click to expand...
What does pin 6 do on the green strip? on the additional input page it says it 'needs special setup'. Could that also be used to ground a relay?
 
EricM

EricM

Administrator
Staff member
All of the spare outputs are grounding outputs. In other words, ign switched 12v goes to the coil side of the relay, the other relay coil wire goes to the output at the ECU, which grounds it when activated, to turn on the relay. When the relay activates, the contacts close on the contact terminals of the relay.

Terminal 6 is an Input, so it does not control a relay.

Inputs are for bringing information into the ECU. Outputs are for controlling external devices.
 
ShaunKris

ShaunKris

Well-Known Member
EricM said:
All of the spare outputs are grounding outputs. In other words, ign switched 12v goes to the coil side of the relay, the other relay coil wire goes to the output at the ECU, which grounds it when activated, to turn on the relay. When the relay activates, the contacts close on the contact terminals of the relay.

Terminal 6 is an Input, so it does not control a relay.

Inputs are for bringing information into the ECU. Outputs are for controlling external devices.
Click to expand...
So pin 12 on the green 22pin says Ignition power 12v, and it is not listed on either of the input or output pages. Could this be a source for those? Or would it be better to source them directly from 12v ign on the fuse panel?
 
EricM

EricM

Administrator
Staff member
When you have a 12v source to power something, that is not considered an input or output.

I would use 12v ign from the fuse panel in your case.
 
ShaunKris

ShaunKris

Well-Known Member
Regarding Ignition power and Batt power from the fuse panel, can I assume that the sources for Ign/acc power woudl be ign1, ign3 locations as per the illustration?
 
ShaunKris

ShaunKris

Well-Known Member
some stuff I used and a bit of a decoder for anyone else looking for a good spot to get some voltage.
 

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