It is amazing nobody has written new software for the stock ABS system. How did your new front brakes work for you?

Forgot to ask. What pads are you using on the front and rear? My car has been in the shop since last year. It's going back together now.

Originally ran CSG spec C2 front, CE1 rears with stock front brake setup.
Now with AP kit up front, running DS1.11 up front, and CSG Spec CE1 rears, so the front bias still remains as C2 and DS1.11 are virtually the same.

Did you know the Nismo Z has a different ABS module than the rest of the 370s? ... and it might be much better?

The non-Nismo ABS module only broadcast the "side g" values (corning g forces) on the CAN bus. BUT the Nismo ABS module has "side g" and "acceleration / braking g" forces. It doesn't seem to have a sensor for braking/acceleration forces.

I wonder if this extra data can prevent ice mode?
In theory, if you are braking at 1.0+g and the wheels are moving a different speeds (like on ice), it should know it isn't "on ice" and not get into ice mode.

How did I find this out?

With the CAN bus reverse engineering I have done for the "GTR MFD Converter" that will allow any 370/G37 with nav to enable the GTR gauges, I came across this.
Below are some screen captures from the GTR MFD (actually my 2011 G37 Nav system, reconfigured for GTR gauges) showing the braking and acceleration screens with data from when I played back a CAN bus log file from a 2016 Nismo Z (6MT).

On a non-Nismo 370, the brake/acceleration screens always show 0. I looked at the CAN bus data, and it has a bunch of zeros for the braking/acceleration g forces in the data stream.

http://www.the370z.com/attachment.ph...1&d=1701130763

I guess the (silly) question is: Has any Nismo Z had "ice mode" at the track?
(silly, because I suspect NO ONE tracks their Nismo)

Maybe a Nismo ABS module in a non-Nismo Z the cheaper solution to ice mode???

For reference:
ABS module part numbers:
6MT 47660-3GM3B
7AT 47660-3GM1B

The 6MT Nismo ABS module is about $1400 new from Nissan
(https://parts.nissanusa.com/p/ABS-Hy...660-3GM3B.html)

One last point:
The "yaw sensor" (aka side g sensor) is the same on all 370 and G37. Either 49731-1EA1A or 49731-JK00A.
This is on a dedicated CAN bus directly to the ABS module and only senses/provides "side g" forces on that CAN bus.

This suggests the Nismo ABS module has the braking/acceleration sensor built into it.

Thoughts?

Ice mode solution?
 

Hope people chime in here and can get you some real world data. Is this for both V1 & V2 Nismos?

Always enjoy reading your posts. Keep it up!


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Great question!
Based on the part Number I gave (6MT: 47660-3GM3B, 7AT: 47660-3GM1B) those are listed as valid for June 2014+ production, so that would mean V2.

If I can get a CAN bus log from a V1 Nismo, I can find out in 30 seconds if the braking/acceleration data is there. I'll try to find a V1 Nismo locally... However just about all the good cars are put away for the winter, so this may need to wait until spring :(

I track my 2011 Nismo. Never had ice mode. But had the VDC do some weird chit.

I'm guessing the car is stored away for the winter right now.
When is the next time it is on the road or at an event?

Some time in March.

http://www.the370z.com/4015134-post1.html

if you read this thread
i don't think StanPoland would have done the teves mod if the Nismo didn't have ice mode issues.

His is a 2018 nismo v2.

Good point.
I guess the question is: was he being pro-active to prevent a future problem, or reactive to fix the issue?

Anyways... as time permits, I'll continue to look into this. Maybe there is something here, or maybe there isn't. You don't know until you look :)

I've had friends hit ice mode on the NISMO 370Zs. Notably the V1

Thanks for this info and I'll keep that in mind.
Next spring summer, I hope to record a few 370z CAN bus to see what the ABS module is sending out.

FUN FACT:
The 2018+ 370z have an OBD gateway and need a special cable to record the vehicle CAN bus. I've made a few and I'm ready!

Yaw switch delete, running the proper brake compound, and not stabbing the brakes. I’ve never had issues with ice mode or my buddy with a v1 nismo.

What brand/compounds are you running recently? Most of the people I recall not having issues were those running "staggered" compounds front/rear.

I'm running the 10/8 combo.

Ice mode solution?
 

Same here. I’ve only once gotten into ice mode when I was using some parts-store street pads (same compound F & R) for autocross duty, and it was a VERY bumpy course. I’ve never once had any ice mode with 10/8 combo, but then again I have very limited experience track driving compared to some other forum members here.


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No issues with carbotech 12/10s here with the yaw switch disabled. As mentioned, good braking technique is also key.

G lock r16/10. These pads are the truth

It was an huge upgrade from the car or tech xp12/10

I’ve got a few friends here down under that are wondering about this as a way to potentially lessen the likelihood of ice mode issues. Did you ever find some more evidence to support (or possibly rule out) your hypothesis, and figure out whether zeta was just being pro-active?

I'm wondering if we could install an ABS pump/module from a 400Z? Which doesn't seem to have the same ABS issues at the track if you brake too hard and have a little lock in teh wheel (i.e. 4 wheel lockups that cause crashes).

I'm a club racer, tons of experience driving, know how to brake, have all the yaw sensor deletes, TC off on my car and I've flat spotted all 4 tires twice from the ABS freaking out and locking up. The ABS program in our cars is awful if you are really pushing it, you simply cannot push things in the brake zones. That's a problem for a track car.

Ok, been talking to the Delta ABS guys, who make a nice, newer, cheaper alternative to the Bosch ABS stuff. I told them about how the removal of OE ABS sensors cause the loss of RPM/MPH function, and I want to retain that, and this was their response below. Any of you 370Z electronic guys

Talked to a few TT/race guys a track event using this system and they really liked it.

https://www.deltaabs.com/

The Delta ABS system transmits data via can, so if you can find someone to program a can bridge of some kind to transmit wheel speed data back to the factory cluster then you can retain that functionality, but the CAN stream within the Delta ABS unit is fixed and is not configurable. The Delta ABS system is very much universal, and if you have two-wire hall effect wheel speed sensors from the factory then you can reuse those and simply install the included wiring harness and ABS module and sensors, there are no vehicle specific instructions, installation and setup is the same on virtually any vehicle.

Nope. The Nismo Z ABS module sends out additional data on the CAN bus. That got me thinking that maybe it is more track focused... BUT it has been reported here that the Nismo also has the ice mode issue... so I've hit a dead end.

I had a quick look at the 370 and new Z FSM and I don't think it would be very easy.

The new Z has ADAS (advanced driver assistance system) with AEB (automatic emergency braking). You would need to see how the ABS module works when it doesn't see the ADAS module on the 370s CAN bus. Sometimes a "fail safe" mode can really limit functionality.

I've been told (but haven't verified) the 2022+ Nissans now use 29 bit CAN bus, so all the CAN IDs may be different and items (like speedometer) may not work without some type of CAN converter.

It also uses a 60amp fused supply, where the 370 uses a 50amp fused supply.

I'm looking to get a CAN bus log on the new Z, but in the last 2 years I've only seen one, so my odds aren't good in getting one.

I've spent the last 2 hours going over their documentation, installed/reviewed their DeltaABS configuration program and looked at their CAN bus definition file (aka DBC file)

I am no motorsports ABS expert, but this looks like a really nice package, with good documentation!

With that said, I should be able to receive the Delta ABS wheel speeds from its CAN bus, convert it, and send it to the 370's CAN bus to drive the speedometer. Probably can also pass through any ABS warning lights from the DeltaABS to the factory dash.

Actually, I just wrapped up a small module that allows the DE 350Z tach and coolant gauge to work with a VHR engine. I've spent the last 3 years researching Nissan's CAN bus and have a very good idea of the messages/data that is on it.

From another project, I have a handful of automotive grade, CAN bus gateways that could be used for this.

I'll reach our to DeltaABS to ask for a CAN bus log of their ABS modules when on the track. I can use that to develop the firmware and test it on my test bench. (my desktop G37/370!)

If it works there, it should work in your 370.

DeltaABS (US office) got back to me. They don't have a CAN bus log and their race car is an hour away.

I've explained to them that I'm fine waiting days, weeks or even a few months for them to get a CAN log and send it to me. I also sent an email to the UK office. (scs-delta.co.uk)

Once I have that log, I can verify (and demonstrate on video) a working speedometer and warnings lights on the gauge cluster.

The module can be developed using their documentation (DBC file), so I don't need it, but sure would like it to verify it on my test bench where it is easy to update code for any bug fixes or feature updates.

This is above my pay grade. :rofl2:

Now we are talking! Please keep me posted.

Yes, I've already talked to some local guys using it and they have great things to say about it. A big leap over MK60 setups.

Keep me posted on how things develop. I'm finally getting hope for this issue.

The UK office forwarded my email to the US office and gave me the same answer:
"Unfortunately we don't have this information. All of the needed information is in the user manual and DBC file. "

Which is correct, the DBC file does give me everything I need... I just like to test with real data.

With a CAN log of the DeltaABS unit being driven, I can use that to make a demo video showing the factory speedometer and ABS warning lights work as expected.

Based on the information I have and what I have done in the past (controlling the gauge cluster) I'm 99% certain I can make a module that reads the DeltaABS wheel speed and send that to the gauge cluster.

I just wish I had CAN bus log file of the DeltaABS module, as that would remove all doubt!

So... the question is:
Is anyone planning on buying this ABS unit and will work with me to get the speedometer working?

Yes, I plan to buy a kit.

Also, I can reach out to some guys here who already have a kit, and see if they can give me some CAN Bus log files, so you can test before I even have one in-hand I suppose. Would that work?

I plan to buy one of their kits soon. This offseason I wanted to get the ABS ironed out, and rebuild/re-tune my LSD.

That would be ideal!
That last thing I want to have happen, is to say that I can do something, and for some reason, I can't.

A CAN log file lets me test the solution like it is on a real car.