Just when I thought I understood it I saw another light on the dash the other day. OK, I have a 4x4 Titan with no BT or OR pacages. Therefore I do not have VDC (no switch either). Now, what's confusing me is that in the past if I take a corner and break a tire free or something like that I would get the flashing "SLIP" light and what always felt like a reduction in power. I was under the impression this was the ABLS and left it at that. The other day I came out of a corner in the rain and hit it hard playing around. This time I got a different light flashing at me. It was "B-LSD". The truck felt like it gained traction but did not feel like it cut the power. Sooooo I looked up there descriptions and this is what I found.

ABLS Function

Active brake limited slip is a function to improve vehicle traction. Spinning of the drive wheels is detected
by the ABS actuator and electric unit (control unit) using inputs from the wheel speed sensors. If wheel
spin occurs, the ABLS system brakes the spinning wheel which distributes the driving power to the other
drive wheel.

The B-LSD (early production) or SLIP (late production) indicator lamp turns on to inform the driver of
ABLS operation.

During ABLS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.

TCS Function

Spinning of the drive wheels is detected by the ABS actuator and electric unit (control unit) using inputs
from the wheel speed sensors. If wheel spin occurs, the drive wheel right and left brake fluid pressure
control and engine fuel cut are activated while the throttle value is restricted to reduce the engine torque
and decrease the amount of wheel spin. In addition, the throttle opening is controlled to achieve the optimum
engine torque.

Depending on road condition, the vehicle may have a sluggish feel. This is normal, because optimum traction
has the highest priority during TCS operation.

TCS may be activated during sudden vehicle acceleration, wide open throttle acceleration, sudden transmission
shifts or when the vehicle is driven on a road with a varying surface friction coefficient.

The SLIP indicator lamp flashes to inform the driver of TCS operation.

I guess what is confusing me is that I thought the TCS was only part of the VDC? So does this mean I have TCS? I have only seen the B-LSD light once and my truck is an August 04 build which I wouldn't think is an early build model?? So I'm just wondering if anybody has any thoughts or comments on this. Oh, and sorry for the long post. :)

Thanks!

I have the SAME question. I have an April 05 build, and the other day on a wet road, stopped at a red light. LIght turns green, i give it gas, and i see SLIP SLIP SLIP blinking, and the power is cut. This is EXACTLY how the VDC on my brother's G35c acts. So i'm thinking maybe i do have VDC, and just dont have an option to turn it off, because that surely isnt the ABLS kicking in.

Anyone else?

Hi qwik, this is a topic I tried to get to the bottom of a year ago over on TT but no one ever responded to me. I fully understand how all of this works with a truck equipped with VDC, but trucks without VDC has me wondering how the TCS actually functions, or even if it's there.

When TCS kicks in you'll feel a definite power reduction from the engine, is that what you feel when a slip condition occurs? If so you definitely have the TCS function but don't have the option of disabling it. At least until I read a post the other day stating if you held in your tow button for a few seconds until it starts flashing, then the claim was TCS was disabled. Can you verify this stuff for me??

Thanks,

Dale

Hi qwik, this is a topic I tried to get to the bottom of a year ago over on TT but no one ever responded to me. I fully understand how all of this works with a truck equipped with VDC, but trucks without VDC has me wondering how the TCS actually functions, or even if it's there.

When TCS kicks in you'll feel a definite power reduction from the engine, is that what you feel when a slip condition occurs? If so you definitely have the TCS function but don't have the option of disabling it. At least until I read a post the other day stating if you held in your tow button for a few seconds until it starts flashing, then the claim was TCS was disabled. Can you verify this stuff for me??

Thanks,

Dale
Dale, that's exactly how it seems to happen. When the wheel slip occurs it reduces power. If I try to do a burnout as soon as a tire starts to spin it feels like the truck cuts power. Hmm, I have never heard of the tow button thing?? When I get home tonight I will go to a parking lot and try that. I will defenitly let you know the outcome. Thanks for teh input!

Jim

Cool qwik, thanks for letting me know. So it appears vehicles that are equipped with ABLS, without VDC, do in fact have the TCS function but with no way of turning it off. Well maybe not until I hear back about the Tow button trick. If that really works you need to start a new thread about it because that's quite a find and will help allow those without VDC to turn the TCS function off......COOOOL...

wow...huge find guys... it never made sense to me why they wouldnt put VDC on all the trucks they made.... and when i saw the SLIP the other day, and power dropped...

Unfortunately i'm not ready to roast my tires, so i wont try spinning my wheels with the tow mode button truck, but i will hold it down and see if it flashes, and see if and new light show up on the dash... i'll look out for the VDC off light that my brother's g35c has....


puv

wow...huge find guys... it never made sense to me why they wouldnt put VDC on all the trucks they made.... and when i saw the SLIP the other day, and power dropped...

Unfortunately i'm not ready to roast my tires, so i wont try spinning my wheels with the tow mode button truck, but i will hold it down and see if it flashes, and see if and new light show up on the dash... i'll look out for the VDC off light that my brother's g35c has....


puv

If you don't have VDC, then you won't get a VDC off light that I know of by holding in the tow button. All you should see is the light in the button start to flash. I'm still waiting for someone without VDC and has ABLS to confirm this little trick works.....

wow...huge find guys... it never made sense to me why they wouldnt put VDC on all the trucks they made.... and when i saw the SLIP the other day, and power dropped...

Unfortunately i'm not ready to roast my tires, so i wont try spinning my wheels with the tow mode button truck, but i will hold it down and see if it flashes, and see if and new light show up on the dash... i'll look out for the VDC off light that my brother's g35c has....


puv

If you don't have VDC, then you won't get a VDC off light that I know of by holding in the tow button. All you should see is the light in the button start to flash. I'm still waiting for someone without VDC and has ABLS to confirm this little trick works.....

Well, I knew it was too good to be true. I tried numerous different things but no matter how long, or in what order I held the tow mode button nothing happened. :( I tried holding before starting, while starting, after starting, I tried from off, holding it on, and from on holding it holding it off.....nothing. :( I also tried a power brake just to confirm what I was feeling and sure enough, As soon as the tires start to spin, the power is cut. Sooo the search continues to find a way to turn off teh TCS. :( :(

Oh, one other thing too. I was able to make the B-LSD light come on again too. That I can seem to make happen by taking a tight corner slow and hammering the gas. That causes the B-LSD light to come on and the truck then hooks up with no power loss. That damn TCS has got to go!!! :)

mine don't do anything like that....if I hit a turn and jump on it one tire lights up and all hell breaks loose and about a inch of rubber is left on the road.

mine don't do anything like that....if I hit a turn and jump on it one tire lights up and all hell breaks loose and about a inch of rubber is left on the road.

Hmm, it must be only the 4x4 titan's that get the TCS without the tow package. I know you don't have the ABLS on your 2wd so you probley don't have the TCS either. Sometimes I wonder what auto makers think???

mine don't do anything like that....if I hit a turn and jump on it one tire lights up and all hell breaks loose and about a inch of rubber is left on the road.

Hmm, it must be only the 4x4 titan's that get the TCS without the tow package. I know you don't have the ABLS on your 2wd so you probley don't have the TCS either. Sometimes I wonder what auto makers think???

Do wish I had a TRUE limited slip rear end with the clutch in the rear end and not the option for ABLS Limited.

mine don't do anything like that....if I hit a turn and jump on it one tire lights up and all hell breaks loose and about a inch of rubber is left on the road.

Hmm, it must be only the 4x4 titan's that get the TCS without the tow package. I know you don't have the ABLS on your 2wd so you probley don't have the TCS either. Sometimes I wonder what auto makers think???

I think your right. Like Rossi's (I'm assuming) I do not have ABLS or TCS.

Hi qwik, this is a topic I tried to get to the bottom of a year ago over on TT but no one ever responded to me. I fully understand how all of this works with a truck equipped with VDC, but trucks without VDC has me wondering how the TCS actually functions, or even if it's there.

When TCS kicks in you'll feel a definite power reduction from the engine, is that what you feel when a slip condition occurs? If so you definitely have the TCS function but don't have the option of disabling it. At least until I read a post the other day stating if you held in your tow button for a few seconds until it starts flashing, then the claim was TCS was disabled. Can you verify this stuff for me??

Thanks,

Dale

Grrrr got my hopes up for nothing. Thank you very much....no really...thanks. :crying:

Is there a fuse for the TCS / VDC system?

There is a relay for the vdc in the relay box under the hood(small cover box). If you don't have vdc then you won't have the relay you'll just have the plug-in harness for it. Also, if you don't have vdc then your abs fuse will be a 30amp fuse. If you have vdc then your abs will be a 40amp fuse.

There is a relay for the vdc in the relay box under the hood(small cover box). If you don't have vdc then you won't have the relay you'll just have the plug-in harness for it. Also, if you don't have vdc then your abs fuse will be a 30amp fuse. If you have vdc then your abs will be a 40amp fuse.

Well here's one fpr ya. :D I just went out and checkked my truck. I don't have VDC so I don't have the relay, however I do have the 40 amp ABS fuse. Hmmmmmmm

i tried holding the tow button as well to no avail.

I can say this much, i have an 05 with big tow and offroad, and i definately have that TCS feature, cause i've felt the power drop off, and seen the SLIP blink. I havent tried pegging the pedal around a corner yet, to see if the other light comes on, but i'm sure it will

i too would like to find a way to disable tcs on demand.

There is a relay for the vdc in the relay box under the hood(small cover box). If you don't have vdc then you won't have the relay you'll just have the plug-in harness for it. Also, if you don't have vdc then your abs fuse will be a 30amp fuse. If you have vdc then your abs will be a 40amp fuse.

Well here's one fpr ya. :D I just went out and checkked my truck. I don't have VDC so I don't have the relay, however I do have the 40 amp ABS fuse. Hmmmmmmm


well hmmmm maybe because you have a 4x4?
Are the fuses next to it 30amp fuses or 40?

There is a relay for the vdc in the relay box under the hood(small cover box). If you don't have vdc then you won't have the relay you'll just have the plug-in harness for it. Also, if you don't have vdc then your abs fuse will be a 30amp fuse. If you have vdc then your abs will be a 40amp fuse.

Well here's one fpr ya. :D I just went out and checkked my truck. I don't have VDC so I don't have the relay, however I do have the 40 amp ABS fuse. Hmmmmmmm


well hmmmm maybe because you have a 4x4?
Are the fuses next to it 30amp fuses or 40?
Very strange, it must have something to do with the 4x4 models I guess. And yes, the fuses next to it are 30 amp.

i tried holding the tow button as well to no avail.

I can say this much, i have an 05 with big tow and offroad, and i definately have that TCS feature, cause i've felt the power drop off, and seen the SLIP blink. I havent tried pegging the pedal around a corner yet, to see if the other light comes on, but i'm sure it will

i too would like to find a way to disable tcs on demand.

That is probably just the ABLS. The slip light comes on when it's working. It may seem to reduce power just because the brakes are grabbing. Oh, by the way, Canteen is actually the fastest color, but not many people know, because of it's camoflage properties. :dance2:

i tried holding the tow button as well to no avail.

I can say this much, i have an 05 with big tow and offroad, and i definately have that TCS feature, cause i've felt the power drop off, and seen the SLIP blink. I havent tried pegging the pedal around a corner yet, to see if the other light comes on, but i'm sure it will

i too would like to find a way to disable tcs on demand.

That is probably just the ABLS. The slip light comes on when it's working. It may seem to reduce power just because the brakes are grabbing. Oh, by the way, Canteen is actually the fastest color, but not many people know, because of it's camoflage properties. :dance2:
It's not though, cuz when the ABLS kicks in I get a B-LSD light that flashes and the power is not cut. I think that 4x4's have the TCS & ABLS, but not VDC.

i tried holding the tow button as well to no avail.

I can say this much, i have an 05 with big tow and offroad, and i definately have that TCS feature, cause i've felt the power drop off, and seen the SLIP blink. I havent tried pegging the pedal around a corner yet, to see if the other light comes on, but i'm sure it will

i too would like to find a way to disable tcs on demand.

That is probably just the ABLS. The slip light comes on when it's working. It may seem to reduce power just because the brakes are grabbing. Oh, by the way, Canteen is actually the fastest color, but not many people know, because of it's camoflage properties. :dance2:
It's not though, cuz when the ABLS kicks in I get a B-LSD light that flashes and the power is not cut. I think that 4x4's have the TCS & ABLS, but not VDC.
Hi,
I have never seen my ABLS lite come on, it's always SLIP.
On my Borla Video post, I had "VDC OFF" activated, and when you hear the peel out stop and then start, it was the brake activating, not the power being cut. If the VDC was on, the power would have been cut so drastically that the burnout would not have resumed.
My 2c., VMMV
T Rex

That's what I'm saying though, if I try to do a burnout as soon as a tire starts to spin it cuts power and that's the end of the attempted burnout. :(

I too have the same problem, however, I don't have any lights popping up! What I get is a decrease in power/braking (not sure which one) when im just about to start spinning the tires. I have a '05 LE with ABLS, Big Tow but no VDC

Here's the link I was talking about concerning the tow mode button trick. http://www.clubtitan.org/posts4190-15.html It was jtrich that brought it up but it apparently doesn't work. Oh well, perhaps someone will stumble on another way to disable the TCS system on non-vdc equipped trucks....

Hmmmm... I have NEVER seen the B-LSD light blinking. All I got is the SLIP light blinking. The funny thing is that when my truck was brand-new, it would burn tires at takeoff, but now... it doesn't. It never really bothered me because I don't do it too often, and I always thought that somehow the computer just adapted the power output to my driving style.
Maybe the TCS somehow learns what your optimum traction is.
I guess I learn something new everyday... And then forget one every other...

Hmmmm... I have NEVER seen the B-LSD light blinking. All I got is the SLIP light blinking. The funny thing is that when my truck was brand-new, it would burn tires at takeoff, but now... it doesn't. It never really bothered me because I don't do it too often, and I always thought that somehow the computer just adapted the power output to my driving style.
Maybe the TCS somehow learns what your optimum traction is.
I guess I learn something new everyday... And then forget one every other...
They reason you never have seen the B-LSD light is because you probley don't have it. According to the service manual (see the manual quotes in my first post) only earlier build Titans have that light. All others I assume use the SLIP light for both ABLS and TCS functions. :)

Hmmmm... I have NEVER seen the B-LSD light blinking. All I got is the SLIP light blinking. The funny thing is that when my truck was brand-new, it would burn tires at takeoff, but now... it doesn't. It never really bothered me because I don't do it too often, and I always thought that somehow the computer just adapted the power output to my driving style.
Maybe the TCS somehow learns what your optimum traction is.
I guess I learn something new everyday... And then forget one every other...
They reason you never have seen the B-LSD light is because you probley don't have it. According to the service manual (see the manual quotes in my first post) only earlier build Titans have that light. All others I assume use the SLIP light for both ABLS and TCS functions. :)

Mine was built November 03, and I don't see that light. (not that it isn't on the dash).
T Rex

Hmmmm... I have NEVER seen the B-LSD light blinking. All I got is the SLIP light blinking. The funny thing is that when my truck was brand-new, it would burn tires at takeoff, but now... it doesn't. It never really bothered me because I don't do it too often, and I always thought that somehow the computer just adapted the power output to my driving style.
Maybe the TCS somehow learns what your optimum traction is.
I guess I learn something new everyday... And then forget one every other...
They reason you never have seen the B-LSD light is because you probley don't have it. According to the service manual (see the manual quotes in my first post) only earlier build Titans have that light. All others I assume use the SLIP light for both ABLS and TCS functions. :)

Mine was built November 03, and I don't see that light. (not that it isn't on the dash).
T Rex
That is strange. I've had my truck since September and I just saw the light for the first time a few days ago. Most of the time I see the SLIP light and get the power cut. :)

Hopefully we can find a solution to disable the abls function. I have a 05 cc titan le 4x2 with big tow, no vdc. I tried the tow button trick, doesn't work for my truck. Is there anyway to install the vdc system and button on a non vdc equiped truck?