Cruise Control Shutting Off

[rmtannerjr]

Rarely do I need advice as most small issues that I have had, others on this fine forum have been through and had a solution for. Having said that I now have 480,000 miles on my 2000 landcruiser and I daily drive about 100 miles a day. 4 lane highway mainly, cruise set around 62 indicated. With 34.25 Terragrapplers that puts me at around 68mph. On the 40 miles each way of highway, my cruise typically cuts off around 8-10 times and almost always during a sweeping curve or lane change. Another issue that seems unrelated is the Stability Control warning beep periodically kicks on for 5-30 seconds usually at random and goes away. You will notice I have several things wrong with my cruiser. But at the mileage I have, unless it stops getting me from point A to B safely, I live with it. The cruise and beeping has now gotten to be more than I can stand so I would appreciate any help or advice.

Possible related symptoms or things to consider:
-VSC TRAC and VSC OFF lights are lit and have been for well over a year now
-80,000 miles on Ironman Medium Lift/ Carls UCA's / 1" Front Wheel Spacers
-10-15 degrees of slack in steering and steering wheel seems well off center now maybe 15-20 degrees
-C1201 Code being thrown indicating ABS problem. ABS light is NOT on so not sure if a wheel speed sensor is the cause since when I disconnect one the ABS light does in fact come on.
-No rear bushings have ever been replaced which seems to make highway speeds a bit less stable, mainly noticed while going over the crown of the road changing lanes at speed.

Someone at the end of this thread claims his dropped at similar times but suspected the brake lights. I am unsure how that could be my problem but is worth a look I suppose.
Cruise control dropping

Thanks for any help!

Richard

 

[jrmudder92]

Did you ever find anything out? I'm having the same problem!

 

[rmtannerjr]

Sadly no I haven't, my theory is that there is a steering sensor that must need to communicate with the wheel speed sensors and since I have lots of slack in my wheel, the truck thinks I have lost traction deactivating the cruise and usually sounding the beep. Just a theory, as I came from a BMW mechanical background.

Do you have any slack in your steering wheel?

 

[OTSWolf]

Rarely do I need advice as most small issues that I have had, others on this fine forum have been through and had a solution for. Having said that I now have 480,000 miles on my 2000 landcruiser and I daily drive about 100 miles a day. 4 lane highway mainly, cruise set around 62 indicated. With 34.25 Terragrapplers that puts me at around 68mph. On the 40 miles each way of highway, my cruise typically cuts off around 8-10 times and almost always during a sweeping curve or lane change. Another issue that seems unrelated is the Stability Control warning beep periodically kicks on for 5-30 seconds usually at random and goes away. You will notice I have several things wrong with my cruiser. But at the mileage I have, unless it stops getting me from point A to B safely, I live with it. The cruise and beeping has now gotten to be more than I can stand so I would appreciate any help or advice.

Possible related symptoms or things to consider:
-VSC TRAC and VSC OFF lights are lit and have been for well over a year now
-80,000 miles on Ironman Medium Lift/ Carls UCA's / 1" Front Wheel Spacers
-10-15 degrees of slack in steering and steering wheel seems well off center now maybe 15-20 degrees
-C1201 Code being thrown indicating ABS problem. ABS light is NOT on so not sure if a wheel speed sensor is the cause since when I disconnect one the ABS light does in fact come on.
-No rear bushings have ever been replaced which seems to make highway speeds a bit less stable, mainly noticed while going over the crown of the road changing lanes at speed.

Someone at the end of this thread claims his dropped at similar times but suspected the brake lights. I am unsure how that could be my problem but is worth a look I suppose.
Cruise control dropping

Thanks for any help!

Richard

That is curious. Mine does the same thing off and on. I have ignored it for the most part given the slack in the steering wheel and the fact that the wheel bearings and the ball joints need to be taken care of. But it did get scary the other day driving on some mountain roads. The VSC actually kicked on twice while driving. I adjusted my driving and it took care of the problem, but gave me the push to move on the this.

I am not so sure that a sensor is the problem (at least in my case with no codes), but the question I have is if bad ball joints and wheel bearings are enough to cause the VSC to kick on? Any thoughts? This might give some credibility to your initial thought about bushings or maybe some other part of the suspension that could be the problem.

 

[jrmudder92]

Sadly no I haven't, my theory is that there is a steering sensor that must need to communicate with the wheel speed sensors and since I have lots of slack in my wheel, the truck thinks I have lost traction deactivating the cruise and usually sounding the beep. Just a theory, as I came from a BMW mechanical background.

Do you have any slack in your steering wheel?

Hmm okay. And yes I do. A good amount not too bad. Do you thank there's a way to disable a sensor or what not?

 

[rmtannerjr]

Well as far as I know, the vsc has to work off of wheel speed sensors. If it senses one wheel is going faster than the other the vsc intervenes and brakes the wheel that is faster. However, while the truck is in a turn the wheels naturally spin at different speeds. I assume the vsc has to know this is happening by a steering sensor. Like I said this is all pure speculation.

 

[jrmudder92]

Well as far as I know, the vsc has to work off of wheel speed sensors. If it senses one wheel is going faster than the other the vsc intervenes and brakes the wheel that is faster. However, while the truck is in a turn the wheels naturally spin at different speeds. I assume the vsc has to know this is happening by a steering sensor. Like I said this is all pure speculation.

I took mine out last night and cleaned a good bit of mud and dirt and crud. But still makes no difference.

 

[jrmudder92]

This for a straight line kinda give or take

 

[Spoosner]

Anybody ever have luck figuring this out? My 2001 LX470 started randomly dropping the cruise control (doesn't even seem to be related to changing lanes or anything, just completely random). Yesterday the Stability Control warning happened for the first time.

@rmtannerjr

 

[BamaPaul]

Searched and found this thread today thinking "wow that's exactly what mine just started doing, great someone will have a fix in the thread." I guess not. Is there a solution? I've read steering rack needs to be replaced, clock spring needs to be replaced, wheel speed sensor, wheel bearings, bad rubber in steering components...

Mine has no mods, steering is tight, jacked the wheels up and there's no top to bottom play, taken the steering wheel apart and cleaned the cruise stalk. Does anyone have an answer or a good test to check speed sensors or steering rack?