Anybody seen this error while on track?

[Lordhowe]

Was at the track this weekend with an ambient temp right around 95 (heat index in the triple digits) and during my 2nd and 3rd runs, the car went into limp mode after throwing the following two errors:

1. Rear axel lock reduced
2. Cont. driving possible: chassis stablization

The error would go away after a quick restart but will go into limp mode very quickly. I tried to cool the car in between session with fans and that seemed to work.
Has anyone seen these error? If so, are they heat related issues or is there something else worth bringing back to the dealership for? If it's over heating, any good aftermarket options? (I have seen the rear diff baffle that Verus Engineering make, not sure if anyone has tried that or not).

Thanks

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[nibble]

while none of my student nor I had that issue, I saw one other student had chassis code. It was a modified supra and it would go into limp mode. As you said, it will clear after restarting the car but complaint from student and instructor was every time when they were going over turn 1 on NJMP lightning, that message will pop up and car will go into limp mode and made it un-drivable on the track.

turn 1 is a right hander turn going over a crest about 50 ~ 60 mph for DE1 students.

 

[DarkZupra]

1. Rear axel lock reduced

The supra has an electronic locking rear differential - electronically controlled clutches engage, disengage and slip in order to act like a 'smart' LSD. Those clutches and the fluid they are in can overheat and cause that error.

 

[Rocksandblues]

Was at the track this weekend with an ambient temp right around 95 (heat index in the triple digits) and during my 2nd and 3rd runs, the car went into limp mode after throwing the following two errors:

1. Rear axel lock reduced
2. Cont. driving possible: chassis stablization

The error would go away after a quick restart but will go into limp mode very quickly. I tried to cool the car in between session with fans and that seemed to work.
Has anyone seen these error? If so, are they heat related issues or is there something else worth bringing back to the dealership for? If it's over heating, any good aftermarket options? (I have seen the rear diff baffle that Verus Engineering make, not sure if anyone has tried that or not).

Thanks

What track?

You are driving too far over your car's ability to keep the rear end pointing in the correct direction. That error means it is really really working hard to keep you out of trouble and it will over heat.

Pm me if I can help

 

[Lordhowe]

while none of my student nor I had that issue, I saw one other student had chassis code. It was a modified supra and it would go into limp mode. As you said, it will clear after restarting the car but complaint from student and instructor was every time when they were going over turn 1 on NJMP lightning, that message will pop up and car will go into limp mode and made it un-drivable on the track.

turn 1 is a right hander turn going over a crest about 50 ~ 60 mph for DE1 students.

I know that happens alot with cars that has lowered suspension and it has to do with the difference in ride height between the front/rear. That, fortunately, isn't my problem so I'm leaning towards the fact that the rear diff just got too hot and it went into limp.

Has anyone used any after market parts that help cool the rear diff?

Also, it's really fun guessing when the car will go into limp mode while on VIR - is it going to happen in the middle of the back straight so others can rear-end me going triple digits? or is it going to happen in the middle of the climbing esses... Great confidence booster I tell ya.

Thanks

 

[XtremeMaC]

Has anyone used any after market parts that help cool the rear diff?

Maybe give this little "fix" a try:
https://www.verus-engineering.com/s...oling-plate-mk5-toyota-supra-1416?category=17

 

[Lordhowe]

Ordered - let see how it does.

 

[Escapist]

It's sad how the MKV is advertised as a track car yet can't handle track driving without something overheating or a light coming on.

 

[Rocksandblues]

It's sad how the MKV is advertised as a track car yet can't handle track driving without something overheating or a light coming on.

Lot of us supra track rats haven’t had much of any trouble.

I don’t believe that is true.

 

[Lordhowe]

Lot of us supra track rats haven’t had much of any trouble.

I don’t believe that is true.

I wonder how many folks are running sub 2:09 at VIR on a stock supra (except front sway bar + camber plates) in 98 degrees heat. The more I think about this, the more I think it's due to the crazy ambient temp.

 

[nibble]

just for reference.

https://www.supramkv.com/threads/best-track-times-registry.1926/

 

[Lordhowe]

Update and new limp mode -

Added the Verus Engineering rear diff plate and haven't seen anymore rear axel errors although the ambient temp is in the 70's, not in the mid-90's.

Over the weekend, while on Thunderbolt (NJMP), the car went into limp on one session and the error i received was: "Drivetrain: "
The error went away after a quick restart and never came back.

Any idea what this means?

 

[Sereph102889]

Update and new limp mode -

Added the Verus Engineering rear diff plate and haven't seen anymore rear axel errors although the ambient temp is in the 70's, not in the mid-90's.

Over the weekend, while on Thunderbolt (NJMP), the car went into limp on one session and the error i received was: "Drivetrain: "
The error went away after a quick restart and never came back.

Any idea what this means?

Are you driving sport manual or sport auto? Is the car tuned or is it on the stock tune file? Are you keeping VSC Traction control on, 1-Click off, or Hold-Off completely? Lots of variables could be causing this. Do you have any ways to track the temps you're seeing for oil, coolant, transmission etc etc?

I've only really seen people complain about this issue when the transmission isn't happy with the torque vectoring via tuning, or if the car spends to much time at or near redline. I myself have had this issue on an OTS Ethanol blend tune, anytime the car would reach limiter, or damn near 7k RPM's, it would go into limp mode and display this exact error. This has since been fixed with a revised tune, but when this was occuring, I used my tuner scan tool and it gave me a readout something like "Not enough fueling for performance level". Are you by chance running the car damn near empty when this is occuring? If so, it could be an issue with the fuel pump potentially having to work to hard to scavenge fuel.

How hard would you say you're pushing the car? Are you driving it 10/10's at it's limit, or 10/10's at your limit? I know several guys on here track their Supra and I haven't seen any of them complain about issues like this.

 

[Rocksandblues]

Only happened once in 30 track days or more. Happened when I was trying to keep up with an actual race car that is on a different planet. I was abusing the car and sliding all over the place.

 

[Lordhowe]

Are you driving sport manual or sport auto? Is the car tuned or is it on the stock tune file? Are you keeping VSC Traction control on, 1-Click off, or Hold-Off completely? Lots of variables could be causing this. Do you have any ways to track the temps you're seeing for oil, coolant, transmission etc etc?

I've only really seen people complain about this issue when the transmission isn't happy with the torque vectoring via tuning, or if the car spends to much time at or near redline. I myself have had this issue on an OTS Ethanol blend tune, anytime the car would reach limiter, or damn near 7k RPM's, it would go into limp mode and display this exact error. This has since been fixed with a revised tune, but when this was occuring, I used my tuner scan tool and it gave me a readout something like "Not enough fueling for performance level". Are you by chance running the car damn near empty when this is occuring? If so, it could be an issue with the fuel pump potentially having to work to hard to scavenge fuel.

How hard would you say you're pushing the car? Are you driving it 10/10's at it's limit, or 10/10's at your limit? I know several guys on here track their Supra and I haven't seen any of them complain about issues like this.

The car is stock aside from Camber plates and Brake pads. Running on Sport and letting the trans shifting automatically. Gas had 2 bars left and I was driving the car pretty hard.

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