analog input soldering????

CK4500 · Post by **CK4500** » Wed Apr 08, 2009 6:36 pm

I have an S300 on a P06. I am curious about soldering the ecu so I can use an analog input to connect my wideband.

The instructions tell me to remove R2 & R3 and replace them with a 1N4148 diode. I have the diodes and I am ready to go. My only problem is I can't figure out which way to install the diodes? I can't find anything to indicate the polarity.

Geeks at the electronics shop told me resistors allow current in both directions, but the diode works more like a valve, only allowing current to travel one way. So, which way???

Any helpful advice on opening up any of the analog inputs would be appreciated!

Thanks

Post by **Hondata** » Thu Apr 09, 2009 6:52 am

You do not need the diodes.

For reference, if you were to install them then you would need to identify the analog input, ground and power for the R2 and R3 footprints. One diode has the anode connected to ground, and the cathode to the input. The other diode has the anode connected to the input and the cathode to power. In this way they prevent the analog input from dropping below the ground plane or above the power supply.

Again, just remove R2 & R3 and leave out the diodes.

Post by **Spunkster** » Thu Apr 09, 2009 9:56 am

Simply follow the instructions at http://www.hondata.com/techplxwiring.html and you will not have any problems.

CK4500 · Post by **CK4500** » Fri Apr 10, 2009 8:07 am

Thanks for the info!

So what about setting up the other analog input? should I set up both?

ALso, when I go into Smanager under Parameters/closedloop and select B6 as my input source, if I try to set the voltage to 0.00/5.00/5.00 and then set the lambda to 10.00/20.00/20.00 the voltage goes right back to 2.00/2.00/2.00.

How do I make it stay?

Post by **Spunkster** » Fri Apr 10, 2009 9:49 am

You shouldn't be using an analog input for a wideband. You should be using the available inputs listed in the closed loop tab.

Make sure you go to Options, Settings and in the Units tab make sure you have it set to Air Fuel instead of Lambda.

CK4500 · Post by **CK4500** » Fri Apr 10, 2009 2:00 pm

[quote="Spunkster"]You shouldn't be using an analog input for a wideband. You should be using the available inputs listed in the closed loop tab.quote]

I am confused!

I thought the 2 analog inputs were the only way to connect my AEM wideband? So where do I connect my wideband, if not to these inputs? Is it as simple as splicing my output from the AEM in to one the the wires on my OBD2 to OBD1 adapter?

On a positive note, I installed my ECU and the car started up and ran quite smoothly! I am using the supplied B16 Supercharged calibration.

Post by **Spunkster** » Fri Apr 10, 2009 4:43 pm

Please follow the instructions in the link I posted above. You do not use the analog inputs for those instructions. On the closed loop tab you can also see the inputs you can choose from.

CK4500 · Post by **CK4500** » Sat Apr 11, 2009 9:05 am

I more or less ignored those instructions, since they are for a PLX wideband. I am not removing my factory o2 sensor and replacing it with my AEM. I didn't think my AEM was able to do both narrow band, and wideband for data logging.

If I use D14, will this replace my stock o2 input?

Thanks for your help on this!

Martian · Post by **Martian** » Sat Apr 11, 2009 9:15 am

CK4500 · Post by **CK4500** » Sun Apr 12, 2009 6:44 am

Which pin is the stock o2 sensor using now? I can't find another one for an o2 input in the S300 Guide

fly_n · Post by **fly_n** » Sun May 17, 2009 9:42 pm

Spunkster wrote:You shouldn't be using an analog input for a wideband. You should be using the available inputs listed in the closed loop tab.

just to clarify,before i start messing with this option,

both analog inputs(D12 & B6) are listed in the closed loop tab (no smartarse intended,just in case u overlooked it),

so should we or shouldnt we be trying to use them for WB input?

Martian · Post by **Martian** » Mon May 18, 2009 4:56 am

You need to use the ELD input