First GenIV LMG swap AFM data logs

[PSWired]

Yeah, I was wondering about the vibrations. We are missing the damped motor mounts that the AFM engines come with, so I'd imagine this could be a problem. Is it a specific frequency that is a problem or is it occurring across a range of RPMs?

[harascho]

I will do more research tomorrow, I will come up with some logs and my impressions

Harald

I still have the hydraulic motor mounts, but they are awkward to adapt to our generation of front frame design

[VEGASROBBI]

Good work Harold Is that Avalanche tune from A 2WD?

If I understand what Patrick is saying the 4WD tune is looking for bus data from the TCCM and the hardwire has no effect without it.

That might explain why my 4WD tune ignores any drivetrain type I set.

I hope to get a look at my log with the new pids tonight.

[VEGASROBBI]

Just checked my log with the updated pid's. The only disabling factors I see now are, still, the Axle Torque Limiting (which I ignore)?

And the "Min time with all cyls on not met".

Interestingly the "DOD/AFM Distance Activated" counts up with my odometer; and the "DOD/AFM Distance Deactivated stays at 0.

Could this be a pid issue?

The 4 lo pids seem to be OK.

[harascho]

Robbie, are you sure that you copied the new PID definitions to the 7.5/configuration folder ? What you've got is what I had before I changed to the updated PID definitions. Maybe you should download that GM_enhanched file in this threead again and copy the files to Programs/EFIlive/7.5/configurations

Harald

[harascho]

I did a longer test run this afternoon.
It seems the AFM kicks only in when I am almost off the throttle. I tiny little bit of throttle and it's back to V8 mode.
In these situations it's always AFMINHIB1-AFMA31 Manifold vaccum pressure too low which throws me out of V4.

Maybe someone has some ideas with the attached log.

Harald

[VEGASROBBI]

You are correct Harold, guess I didn't download the updated folder correctly.

Now my only disabling factors are 4WD Lo on and 4WD State invalid.

Does this mean I need a 2WD tune? Thanks.

[harascho]

As I said, welcome to the 4wdlo club, Robbie

Yes you need a 2wd tune to get the 2hi and AFM mode trouble solved. As you have a VSS in front of your TC you could have luck and your 4wdlo will work, at least from the behaviour of the tranny. I think you will run into the following: V4 mode will also kick in in 4wdlo and that is what we don't want.

It all comes down to a working 4wd tune combination in E38 and T42, I hope the EFIlive crew will find something to get that going without a TCCM.

I will check into the Idea with the '07 TCCM but a leaking water pipe in one of my houses walls got my complete attention yesterday.

By the way I will be in OCCA from April the 5th until the 19th and I will spend a few days in Vegas.. we could meet in person for some further disussions..

Harald

[PSWired]

Okay, here are my log results:

AFM Inhibit reasons:

Transmission gear incorrect
Transmission range incorrect

Those are exactly what I suspected- the 2009 ECM does not correctly read the state of the 2007 TCM operating system data. This causes a variety of problems such as the wrong desired idle speed, no reverse lights, cannot perform CKP relearn, etc.

The brake vacuum pressure too low PID sets occasionally. But the brake vacuum pressure sensor fault does not set. I wonder if I have a calibration that estimates the brake pressure from MAP value and brake usage instead of using hardware sensor data??

The 4LO disablers do not set at any time. I seem to remember there being a 4LO status PID mentioned earlier, if I can find this I will see if this indicates the correct 4LO status for my application.

Looks like I need to start by upgrading my TCM to the 2009 OS. Just need the .calz file for it and I should be in business!

[PSWired]

Looks like the AFM disable PID for 4LO active will not set, even when 4LO is actually active. I thought I had a 4WD calibration in my ECM? This testing was done with the vehicle stationary, and with screwed up transmission state values from the 07 TCM, so that could have something to do with it.

Looks like I really need to get the 09 OS on the TCM before I can proceed.