Can I ground my LC-1 to the ECU?
I have a few open spots on my terminal board, mabye Ill run the ECU like you stated to one and a straight ground to the battery to the other, and use those points. I know the LC-1 is going to be a current hog though. Ohms Law states that resistance is the reciprocal of voltage and current. So if I keep the voltage the same (the 12v for LC-1/xd16) and the resistance increases from adding these devices, then current will decrease as well. Im sure its not that HUGE of a deal and Im probably over-thinking it though. I would like it to run straight off the battery with a remote tap to power an automotive relay that routs power from the battery to the devices. I think thats what Ill do. Items closer to the source take precidence, as electrons take the path of least resistance.
The cleanest voltage will come right off the battery. So essentially you run a line from the positive battery to one point of a 12volt relay. Then the other point run a line to the LC-1. Now ground the LC-1 to the negative side of battery (or a really good chassis ground). Then run remote from wherever (radio/cig lighter ect) to the trigger side of the relay, and then run the trigger ground to any old ground. What will happen is when remote is active (key is on) the relay will switch over and give power straight from the battery to the LC-1, but when the key is off the LC-1 will loose power (so your battery doesnt die). Its also automatic, because you dont want a power switch for the LC-1 in case you leave it off on accident (oops!).
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From: Tri-Cities, WA // Portland, OR
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From: Tri-Cities, WA // Portland, OR
Some time in the next couple weeks, I will hopefully be posting a how-to for feeding the WBO2 signal into the ECU so that EvoScan can log WBO2 without having to attach a serial cable between the wideband controller and the laptop. Fewer cables for logging, more stealth, easier logging. With this setup, the ground attachment point will be important to obtain accurate WBO2 data.
Last edited by mrfred; Jan 13, 2008 at 11:22 AM.
Sensor ground is a ground used only for sensors. Power ground is the ground for the ECU itself. Sensors have their own ground to ensure that they are not affected by higher current flow from other powered items. Unless you are planning to feed the WBO2 analog out into the ECU, there's no need to worry about where to ground the LC-1. It can be grounded to the chassis.
Some time in the next couple weeks, I will hopefully be posting a how-to for feeding the WBO2 signal into the ECU so that EvoScan can log WBO2 without having to attach a serial cable between the wideband controller and the laptop. Fewer cables for logging, more stealth, easier logging. With this setup, the ground attachment point will be important to obtain accurate WBO2 data.
Some time in the next couple weeks, I will hopefully be posting a how-to for feeding the WBO2 signal into the ECU so that EvoScan can log WBO2 without having to attach a serial cable between the wideband controller and the laptop. Fewer cables for logging, more stealth, easier logging. With this setup, the ground attachment point will be important to obtain accurate WBO2 data.
I however ended up pulling power from the ecu 12V pin, I fused it ofcourse
everything seems to work fine.
Some time in the next couple weeks, I will hopefully be posting a how-to for feeding the WBO2 signal into the ECU so that EvoScan can log WBO2 without having to attach a serial cable between the wideband controller and the laptop. Fewer cables for logging, more stealth, easier logging. With this setup, the ground attachment point will be important to obtain accurate WBO2 data.
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I think i can configure both to act as WB's
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One of the analog outputs on the LC-1 is a 0-5V signal that covers the WB afr range. The other analog out sends a 0-1V NB signal. I would guess that the WB gauge needs the WB analog signal. You'll have to feed the signal into the ECU and into the gauge. Should be no problem as long as the WB controller can handle the load. Might want to check with Innovate.
One of the analog outputs on the LC-1 is a 0-5V signal that covers the WB afr range. The other analog out sends a 0-1V NB signal. I would guess that the WB gauge needs the WB analog signal. You'll have to feed the signal into the ECU and into the gauge. Should be no problem as long as the WB controller can handle the load. Might want to check with Innovate.
Where would you feed the 5V line into the ECU at?
There is [pin 72 O2 sensor] but then I guess you then not be using the stock sensor?
Last edited by Profoxcg; Jan 21, 2008 at 06:43 PM.
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Yes, we simulate the rear O2 signal in the ROM, and then highjack the rear O2 ADC input to use for the WBO2 signal. Once the WBO2 signal is routed into the ECU, then we assign it a RAM address, and read the RAM address with EvoScan. If you want to do it, you'll just need to get your hands on a pin for the ECU. I'm supposed to be determining the correct pin dimensions for the meth failsafe patch how-to, but haven't done it yet. Rear O2 is pin 73 on Evo 9s. :-)