Gen 2 Innovate Motorsports LM-2 WBO2 Install

DLF

DLF

Registered
I have found that the ODB-II RPM and MAF voltage using the OBD-II Innovate Motorsports cable (p/n 3809) is VERY unreliable. :mad:

So, I decided to use the analog cable (p/n 3811) to get what I needed.

I had read that in order to get a tach signal from a Gen 2 that you need a tach adapter. :eek:

Well, not so fast. :cool:

I tried the #1 ignition coil signal from the PCM, but that didn't work. :(

What does work, however, is connecting the LM-2 analog RPM input to the #1 injector signal from the PCM. :D

On my PCM (BTC0), the #1 injector signal is a tan wire (#75) and the MAF voltage is a LB/R wire (#88). I connected the grounds for both inputs to a BK/W ground (#24).
 
driller said:
Interesting. I have a wide-band to install too. ;)
Click to expand...

Not as difficult on a Gen 1, you actually have a tach signal coming from the PCM.

It also depends on what you're planning to do with the WBO2. You can just hook it up to get the A/F ratio.

However, if you plan on actually using it to tune the car, you need (at a minimum) a way to simultaneously log A/F, RPM and MAF Volts.
 
Last edited:
DLF said:
Not as difficult on a Gen 1, you actually have a tach signal coming from the PCM.

It also depends on what you're planning to do with the WBO2. You can just hook it up to get the A/F ratio.

However, if you plan on actually using it to tune the car, you need (at a minimum) a way to simultaneously log A/F, RPM and MAF Volts.
Click to expand...

Sounds like something I'm going to let my local speed shop do when I gather up all the money in 20 years or so.

I hope he works on antiques by then...
 
And the result from my latest tuning session. Target AFR was 12.7.

There's a nice road just a couple of miles from my house where I can make full throttle blasts. :D
 

Attachments

  • 04241002log.jpg
    04241002log.jpg
    86.9 KB · Views: 0
Looks to me like you've hit the target! :)

DLF said:
However, if you plan on actually using it to tune the car, you need (at a minimum) a way to simultaneously log A/F, RPM and MAF Volts.
Click to expand...

Yeah, I've got an app for that. ;)
 
DLF said:
And the result from my latest tuning session. Target AFR was 12.7.

There's a nice road just a couple of miles from my house where I can make full throttle blasts. :D
Click to expand...

Well you better do something so when I break the 14 second mark you aren't confused. :D
 
DLF said:
Not as difficult on a Gen 1, you actually have a tach signal coming from the PCM.
Click to expand...

I'm in the process of hooking mine up.

Is the "PIP" (Profile Ignition Pickup) signal from the PCM the one I want for the tach input on the wideband module?
 
driller said:
I'm in the process of hooking mine up.

Is the "PIP" (Profile Ignition Pickup) signal from the PCM the one I want for the tach input on the wideband module?
Click to expand...

Which WBO2 do you have?

For the '93?

More details would help.

Look at your EVTM.

I only have schematics for the '96 and up.

On the '96 there's a tach signal from the PCM on pin 48.
 

Attachments

  • 96PCM.jpg
    96PCM.jpg
    121.6 KB · Views: 0
I have the Zeitronix ZT-2 I'm installing in the '93.

I believe I have found what I need (it is NOT the PIP signal).

The '96 EVTM clearly shows it labeled as "tach output" as you posted. The same circuit on the '93 is called the "IDM" (Ignition Diagnostic Monitor). I was able to figure it out looking at the Message Center and Instrument Cluster pages. Same circuit number and oddly enough, same color wires. :)
 
driller said:
I have the Zeitronix ZT-2 I'm installing in the '93.

I believe I have found what I need (it is NOT the PIP signal).

The '96 EVTM clearly shows it labeled as "tach output" as you posted. The same circuit on the '93 is called the "IDM" (Ignition Diagnostic Monitor). I was able to figure it out looking at the Message Center and Instrument Cluster pages. Same circuit number and oddly enough, same color wires. :)
Click to expand...

Damn Engineers, always trying to make it fancy.... :p

Glad you got it working.
 
I have the auxillary harness ready to tap into the PCM wiring...

  • +12 VDC
  • Ground
  • TPS
  • MAF
  • IDM (tach)

I have another user input I could use. I'm torn between using the IAT or ECT. I have sensors for both but I need to find out if I can use the stock IAT signal (it needs to be a 0-5V value). For now, I'm leaving it go and will come back to it later after I get the whole thing operational and capable of data-logging.

When it's done I should be able to log Lambda, AFR, RPM, TPS, MAF and one temperature input. It can do boost and EGT as well.
 
What is typical MAF voltage at idle or revs with no load?

I have everything wired up and all appears to be working. But it's late, raining and I still have the Hoosiers on the car so I did not get to play.

Next up is to load Serial to USB adaptor drivers onto the netbook and plug it in and play. ;)
 
driller said:
What is typical MAF voltage at idle or revs with no load?

I have everything wired up and all appears to be working. But it's late, raining and I still have the Hoosiers on the car so I did not get to play.

Next up is to load Serial to USB adaptor drivers onto the netbook and plug it in and play. ;)
Click to expand...

< 1V
 
You must log in or register to reply here.
Back
Top