View Poll Results: Where did you tap in for your 12volt source?
ECU pin 12/25
1
50.00%
Cig Lighter
1
50.00%
Other...Please explain in a reply!
0
0%
Voters: 2. You may not vote on this poll
LC-1 / LMA-3 Users....Where did you connect for your power source?
Thread Starter
Evolved Member
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Joined: Mar 2005
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From: La Jolla, CA
LC-1 / LMA-3 Users....Where did you connect for your power source?
Trying to get a good thread for a power source for our 12volt tuning products. All comments will be welcomed!
Now when I first did my LC-1 I was using the write up from Vishnu Tuning that calls for a splice into the cig lighter but i have found that the LC-1 is forced to reset itself during engine start up while it is attempting to boot up...
For example, you turn the key to the on position which turns on the LC-1 since the cig lighter is fed power. Then when you go to start the car, which during this time cuts power to the cig lighter, causing it to reset itself during its boot up period.
I don't know about most, but i find that this could be a bit to much for the unit. Also, the LC-1 cautions that the sensor should not be used on a vehicle with out being powered up and since a turbo timer doesn't maintain power fed to the cig lighter this can cause issues in the long run as well, especially for those that have a turbo timer running for 30 secs or more.
Now I did connect my LMA-3 to the ECU's 12volt source using pins 12 or 25 (cant remember which one) which are both a 12V Switched Power Supply and grounded on pins 13 or 26 (cant remember which one). Reason being is because the LMA-3 calls for a constant 12volt feed for self calibration purposes.
What is everyone using for a power source?? Chime in!!!
Now when I first did my LC-1 I was using the write up from Vishnu Tuning that calls for a splice into the cig lighter but i have found that the LC-1 is forced to reset itself during engine start up while it is attempting to boot up...
For example, you turn the key to the on position which turns on the LC-1 since the cig lighter is fed power. Then when you go to start the car, which during this time cuts power to the cig lighter, causing it to reset itself during its boot up period.
I don't know about most, but i find that this could be a bit to much for the unit. Also, the LC-1 cautions that the sensor should not be used on a vehicle with out being powered up and since a turbo timer doesn't maintain power fed to the cig lighter this can cause issues in the long run as well, especially for those that have a turbo timer running for 30 secs or more.
Now I did connect my LMA-3 to the ECU's 12volt source using pins 12 or 25 (cant remember which one) which are both a 12V Switched Power Supply and grounded on pins 13 or 26 (cant remember which one). Reason being is because the LMA-3 calls for a constant 12volt feed for self calibration purposes.
What is everyone using for a power source?? Chime in!!!
I use the cig lighter to power up my LM-1. The LM-1 comes with cig lighter cable. I have had no problems with it.
PS: You have not responeded to my questions in your dyno thread. Please tell me how did you know that your sensor on the LC-1 was messed up.
PS: You have not responeded to my questions in your dyno thread. Please tell me how did you know that your sensor on the LC-1 was messed up.
Evolving Member
Joined: Dec 2006
Posts: 276
Likes: 0
I don't see a problem with using your current setup for the LC-1. Yes, we warn against leaving an unheated sensor in exhaust gas, but brief exposure at engine start shouldn't be a problem. In OEM installations the sensor is often wired to come on after ignition start. The LC-1 has good brown out protection, so cycling power mid initialization should have no adverse effect to the electronics either.
The LMA-3 calibrates the pressure sensor at power up (since it does relative pressure modes), so it does need true switched power.
-jjf
The LMA-3 calibrates the pressure sensor at power up (since it does relative pressure modes), so it does need true switched power.
-jjf
