Creating pid to log wideband and figuring out which wires go where.

[_Nick_]

Hello, Please forgive my ignorance as I am sure this has been asked before. Please understand that I have watched many YouTube videos and read through a bunch of threads, but I just can't accomplish this without help.

I have an MPVI, the old one, not a fancy version. About 10 years ago (2017) I used it to log AFR in my 2004 Corvette. Everything is still hooked up the same way. I should be able to use the blue and white wires to get my wideband signal from either the EGR or AC circut. I don't remember which I wired up but if I can get the pid created, or both, I can figure that out once one of the pid's have a signal.

I am trying to create these pids but everytime I hit record they dissappear, which from my understanding means it's not supported, probably because I did it wrong.

Can you please help me? I am having a hard time following the instructions I find online. Some of them have VCM scanner screen shots that have icons I dont have. I am sorry but it's time to ask for help. I don't know what I am doing.

Details:
2004 Corvette
VCM Scanner is the latest version
HP Laptop
AEM 35-8460 Wideband (working perfectly)
USB "thing" with brown and blue wires


I am sorry guys I just don't remember how to do this.

Attachment 162504

[DaveNY]

I think you need to add both channels EGR and A/C Press Sensor to the channel list to log the voltage of each. after you add them, save the channels list. this should keep them from disappearing when you log. then create a math parameter to take that voltage and convert it to AFR or EQ.

[_Nick_]

Thank you Dave. I think you're right, but it's so complicated. I need some hand holding here.

Adding the sensor to table is easy, but then I need to right click the empty cell next to it and define it.

This is where the instructions I found say "Click Insert." I don't have that.
I am clicking Add channel
This is where the instructions I found say "Double click Configure User Defined." I don't have that.
I assume I'm using the Channel Selector option under External Inputs because I am using a USB device.

From another thread: Right click in channels list, hit add channel. At the bottom of the list (under external inputs) you'll see "serial port". Find your WB and unit in the list.. double click it, and you're done.

Connect WB to serial port and Scanner will automatically figure out what port it's on, no config needed.

Other threads say I need to input values and tell the sensor what to do and add a math equation so it understands lambda.

So I click AEM - EQ Ratio

Now I am completely lost becuase I don't know how to tell VCM scanner I am using the EGR voltage, or the AC pressure voltage.

I can navigate Add Channel, Engine, Exhaust, 12 EGR Sensor (Voltage) and I think tat's what I should be doing.
Double click to add.
Right Click empty cell Lost again. I need to program it to display as AFR or Lambda.

My instructions say "click on Chart Setings." I don't have Chart Settings.


I don't understand. This seemed way easier in 2017.

Seperate instructions:
Add AEM Serial
right click
Transform
User defined
Click insert or change
Under Tramsofrm: Oxygen sensors
Air Fuel Ratio
AEM 30-? I guess? Mine starts with a 35.
Click that
Would you like a generic sensor? Yes.
Instructions: 5. Now all you need to do is do a complete vehicle repoll. If you do not do this then you WILL NOT get the channel to appear and function. Follow the path shown in the photo to reach your vehicles folder and delete everything inside of it.

Ok, lets try that.
Click Scan vehicle. all my new pids dissappear.

I have been working on this for days and getting no where. Then there's this question about drivers, but the screenshots and instructions are to old for me to use with whatever the new version of Windows is.

[DaveNY]

im not familiar with the MVPI1/2 versions, but if your wideband analog output is connected to the EGR pin of the ECU, i would think you need to scan that channel. and use that parameter (EGR) in any chart or graph. it might be easier to just connect the wideband output to the A/D input 1 on the MVPI and and add that channel? this thread may help
https://forum.hptuners.com/showthrea...ferrerid=95059

[_Nick_]

I am sorry, I dont know what A/D input 1 is. I don't think I have that.

[DaveNY]

Your MVPI device doesn't have the green 8 pin connector on the side?

[DaveNY]

Found this on the support website.

VCM Scanner Help > Channels > Adding Channels > Devices That Connect to a Serial Port

Devices That Connect to a Serial Port
VCM Scanner includes support for external sensors that connect directly to a computer's RS-232 serial port.

Years ago, most laptops included such a port. But, the majority of laptops built today no longer have them. If your laptop does not have a built in serial port, you will need a USB to serial port adapter such as: TRENDnet TU-S9 USB to Serial Converter.

NOTE: Support is limited to specific external sensors that are predefined in the software. If your device has a serial output and you'd like us to add VCM Scanner support for it, please contact us.

Before You Begin
It is important that your computer has the most recent serial port drivers and drivers for the USB to serial port adapter. Be sure that it has the latest updates installed.

Connecting a Sensor
1. If your computer does not have a serial port that fits the cable from the device, connect the USB to Serial Port adapter to your PC.
2. Connect your sensor's serial output to the Serial Port connector on your PC or USB adapter.
3. Open VCM Scanner and connect to the vehicle.
4. If the Channels display is not already open, click the tab on the left edge of the screen to display it.
5. Click the icon in the Channels display. The Channel Selector window appears.
6. Go to External Inputs > Serial Port. The folders in this group list supported sensors by manufacturer.
7. Double click on the sensor that you want to configure.
8. The selected input should now appear in the Channels list. Right-click on it and select Transform. The Transform Selector window appears. This window specifies how the raw serial data received must be transformed to get usable sensor data. If an appropriate transform appears in the list, select it and click OK
If the sensor does not appear in the list or you need to customize a transform to account for a signal/noise offset, you can define the appropriate transform manually. See Defining Your Own Transform to complete channel setup.

Channel setup is now complete. It can now be added to gauges, graphs, charts, etc. just like any other channel. When selecting the parameter to include, use the transform you chose in Step 8.

[_Nick_]

Your MVPI device doesn't have the green 8 pin connector on the side?

No Sir.
I do have the Serial to USB adapter.

So those directions get e to step 8. Then I should choose Parameter, engine, exhaust, gas recirculation, EGR sensor voltage (This I assume makes the most sense)

What do I put for function input and output? (input/1) + 9.8?

I have legit done all of this, a million different ways, and when I hit Start Scanning all of my work dissappears.

There's got to be a simpler way.

The HPTuners upgrade is $399.99 and I have to buy the Pro Link cable. I don't know if I want to pay $450.00 to log AFR differently.

I don't understand why this isn't working.

I also downloaded and installed the latest USB drivers.

[gtstorey]

Are you trying to use a serial output from the wideband to the laptop or analog voltage output through EGR or AC to the ECM? Can't do a combination of both.

[_Nick_]

AC pressure actually. I just verified it. I created the AEM wideband pid, then in parameters I changed it to AC pressure voltage, and again, it dissappears when I click start recording.

AC pressure voltage, to serial/USB adapter to the laptop.

[gtstorey]

AC pressure actually. I just verified it. I created the AEM wideband pid, then in parameters I changed it to AC pressure voltage, and again, it dissappears when I click start recording.

AC pressure voltage, to serial/USB adapter to the laptop.

You are going to have to draw me a wiring diagram to figure that out. Where is the wideband connected in this? Either the wideband is connected to the vehicle AC pressure sensor wiring or to the serial adapter.

[DaveNY]

The input/output is where we map the "EGR" voltage to an AFR value. input="EGR" volts. you'll need to know the range for your AEM device. i.e. 0v=10AFR and 5v=20AFR. once you know that you can complete the transform formula in step 8.

[DaveNY]

I wasnt able to find the AEM 35-8460 specs, but i saw a post that said it uses the same as the 30-4110. use the following formula. (V*0.5)+10