Analog voltage input not reading in scanner

[Jacob lowe]

So I just installed a lc2 wideband and and using anolog output 2 off the wideband to connect to my orange connector for the v2 box 0-5v input. I set up the pids and am reading 2v on the plug with a meter and when I scroll through the options on the box and look at self test and displayed ext voltages it shows the same 2vs. Now when I connect to the car through the scanner and start monitoring real time data everything stays at 0v for the wideband and ext v pids. ? What am I doing wrong.?

[joecar]

In the V7 scantool...?

Click the red record button (instead of the yellow monitor button).

[joecar]

BTW: you really should be using serial comms between your LC-2 and your V2.

[Jacob lowe]

In the efi live v7.5 scan tool yes. Just trying to understand why I can get the voltage to read

[joecar]

See this pic (note the null modem adapter, it is not a passthru):

http://forum.efilive.com/attachment.php?attachmentid=4046&d=1224114427

Or you can make a cable to do the same thing (cwap Rx and Tx).


LC-2-Digital-Wideband-anyone-try-it-out (https://forum.efilive.com/showthread.php?23169-LC-2-Digital-Wideband-anyone-try-it-out)

[Jacob lowe]

Thanks but I'm really really wanting to make this 0-5v input work. I used to use the same thing years ago on my turbo truck and worked fine and need to get this working tonight somehow. Any ideas on that?

[joecar]

LC-2 Analog Out 1 is already pre-programmed for 0-5V linear AFR (see page 8 in the LC-2 user manual).

Connect:
- LC-1 Analog Out 1 (yellow wire) to V2 AD1+
- LC-1 Ground (black wire) to V2 AD1-
- LC-1 Ground (black wire) to vehicle ground
- LC-1 Power (red wire) to switched and fused vehicle power

IMPORTANT: tape off the brown wire (Analog Out 2) to avoid shorting it anywhere...!!!

WARNING: when LC-2 is powered up, do not let either of the yellow or brown wires short anywhere...!!!

then if you're in a hurry log these pids:
EXT.AD1, GM.AFR, CALC.AFR_LC11, CALC.BEN_LC11

( you can see in the LC-2 user manual that the 0-5V range maps to AFR 7.35-22.35 same as the LC-1 )

otherwise log these pids:
EXT.AD1, GM.EQIVRATIO, CALC.AFR_LC11, CALC.WO2BEN
( use the calc_pids.txt file from the Calc.VET thread and edit CALC.WO2BEN (CLC-00-130) to read "{GM.EQIVRATIO}*{CALC.AFR_LC11}/14.7" )

[Jacob lowe]

Still no luck. Beginning to think something wrong with my v2

[joecar]

Post a log file.

[Jacob lowe]

here you go joecar

18797

[joecar]

Hmmm, yeah, something is wrong...

can you try with the latest software: Aug-27-2015-EFILive-Public-Pre-Release (https://forum.efilive.com/showthread.php?25899-Aug-27-2015-EFILive-Public-Pre-Release)

Also see if you can get serial comms to work.

[Jacob lowe]

We ordered a null modem adaptor and a serial to rj 12 cable to try.

[Blacky]

Hmmm, yeah, something is wrong...

can you try with the latest software: Aug-27-2015-EFILive-Public-Pre-Release (https://forum.efilive.com/showthread.php?25899-Aug-27-2015-EFILive-Public-Pre-Release)

Also see if you can get serial comms to work.

THIS!!! and make sure you're firmware is up to date. After installing the V8 software, run it and click on the [Check Firmware] button.
There was a bug in older versions of the V2 firmware that caused all external PID values to be logged as semi-random data.

Regards
Paul

[Jacob lowe]

update fixed the problems guys. thanks

[joecar]

update fixed the problems guys. thanksOk.

But make sure you get serial comms going, this gives you better wideband data (immune from ignition noise and ground offsets).

[monkeywrenched]

Null modem adapters are readily available at electrical stores especially if they deal with satellite dish installers.