2003 Cadillac Escalade Logo
Posted on Oct 30, 2010

Brake failure at pedal noise in front wheels traction stalbility light comes on when you take off even when road dry .When you touch brake pedal it acts like a hydraulic brake and kicks back at you

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  • Posted on Oct 30, 2010
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You have a bad wheel speed sensor signal.probably front gm recamends that you replace wheel bearings in a set weather its front or rear for this type of problem a scan tool with the ability to see each wheels data is needed.

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ABS CHECK LIGHT DOESNT COME ON WHEN YOU TURN KEY ON

1. I would not be concerned because if there was a failure in the ABS you would definitely get an ABS warning light and the ABS and most likely the stability control/traction control systems (with added warning lights) will all switch off .

2. You can test if the ABS is operational. On a very quiet damp surface, straight, wide road( with NO other cars around), apply your brakes hard from a very low speed - up to 20 mph ONLY driving in a straight line - until the car stops. The front brakes should attempt to lock up under hard braking and if the ABS is operational you will feel it kick in and the brake pedal will pulsate as the ABS constantly allows brake pressure and then releases it to prevent the wheels from locking up on the damp road. If the ABS does not kick in be ready to release the brake pedal quickly to allow the wheels to rotate so you can steer the car safely. Without the ABS the front wheels should begin to lock up on the damp road surface due to the low level of tire grip. ONLY test this at very low speed and ONLY when driving in a straight line on a straight section of wide road with no other vehicles around.
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1answer

2005impala,has check engine light on, traction control light will come on and a grinding noise occurs when turning wheel sharply around corners.Then it stops.Happens all the time,even on dry surfaces

have code retrieved most auto stores offer this service for free ---check hub /wheel bearing grinding good possibility its shot hub has abs sensor built into it which can be part of traction control issue -c/v axle can also give grinding issue ----as well as check brakes may need brake replacement --stuck/damaged caliper - a brake pad damaged/stuck against rotor
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2answers

Anti-lock system light on

Anti-Lock Braking System (ABS)
Purpose Anti-lock brake systems (ABS) - generally also referred to as anti-lock
systems (ALS) - are designed to prevent the vehicle wheels from locking
as a result of the service brake being applied with too much force, especially
on slippery road surfaces.
The idea is to maintain cornering forces on braked wheels to ensure that
the vehicle or vehicle combination retains its driving stability and manoeuvrability
as far as physically possible. The available power transmission
or grip between tyres and carriageway should also be utilised as
far as possible to minimise the braking distance and maximise vehicle
deceleration.
Why ABS? Although today commercial vehicle brakes are designed to a very high
technical standard, braking on slippery roads often results in potentially
dangerous situations. During full or even partial braking on a slippery
road it may no longer be possible to fully transfer the braking force onto
the road due to the low coefficient of friction (friction coefficient (k)) between
the tyres and the carriageway. The braking force is excessive and
the wheels lock up. Locked wheels no longer provide any grip on the
road and are almost incapable of transferring any cornering forces
(steering and tracking forces). This often has dangerous consequences:
- The vehicle becomes unsteerable
- The vehicle breaks away in spite of countersteering, and starts to
swerve.
- The braking distance is significantly increased
- Tractor-trailer combinations or semitrailer trains may break away or
jackknife.
Load sensing valve influence On dry roads today's load sensing valves (ALB) alone are often capable
of preventing the wheels from locking if the vehicle is unladen; they also
help the driver to effectively grade the braking process on wet road surfaces,
but they are unable to prevent locking as such (no slip monitoring).
In addition, they are unable to counteract any overreactions on the
part of the driver, or any variances in frictional or adhesion coefficients
which may apply to different sides of the vehicle, or indeed to its different
axles (?-split road surfaces).
Benefits of ABS: Only the Anti-Lock Brake System (ABS)
- guarantees stable braking characteristics on all road surfaces.
- maintains steerability and generally reduces the braking distance
- prevents vehicle combinations from jackknifing
- reduces tyre wear.
Limits of ABS Although ABS is an effective safety device, it can not suspend the limits
defined by driving physics. Even a vehicle fitted with ABS will become
uncontrollable if driven too fast around a corner.
So ABS is not a licence for a maladjusted style of driving or failure to observe
the correct safety distance.
4
ABS Training Anti-Slip Regulation (ASR)
Anti-Slip Regulation (ASR)
Why ASR? Increasing the engine output (accelerating) on a slippery road surface
can easily lead to the maximum adhesion on one or all powered wheels
being exceeded causing them to spin, especially if the vehicle is unladen
or partially laden.
Spinning wheels when driving off or accelerating represent a safety risk
just like locked wheel do when braking.
Reasons - Wheels that spin transfer just as little cornering force as locked
wheels.
- They also no longer transfer any tractive power onto the road.
Consequences - Vehicles that do not move or get stuck.
- Vehicles that can no longer be steered, jackknife on uphill uphill
gradients, or swerve in corners.
Benefits of ASR ASR prevents the powered wheel from spinning and provides the following
benefits:
- Tractive power and cornering forces are maintained.
- Stable driving behaviour is ensured when moving off, accelerating
and negotiating corners on slippery roads.
- The indicator lamp (if installed) is used to warn the driver of slippery
road conditions.
- Tyre wear is reduced to a minimum, and the motor vehicle's drive
train protected
- The risk of accidents is further reduced.
ASR and ABS: ASR represents a worthwhile addition to an ABS-controlled braking system.
All that is required to turn ABS control into full ABS/ASR control is
an ECU with the additional ASR function and a few additional components
for controlling the differential brake and the engine. This why ASR
is only available in combination with ABS.
Even a differential lock for off-road use and ASR do not exclude but complement
each other.
Limits of ASR The traction capacity of an all-wheel driven commercial vehicle can not
be achieved by a motor vehicle with only one driving axle - not even with
optimal ASR.

anti-lock-system-light-vi1ay411tmzjz03ru4fkmxgj-5-0.jpg

anti-lock-system-light-vi1ay411tmzjz03ru4fkmxgj-5-2.jpg
0helpful
1answer
0helpful
1answer

ABS and service traction light came on while coming to a stop on an icy road.

This is probably normal as on ice or snow your wheels will slip and both the traction control and ABS will activate. Does your brake pedal vibrate a bit. It also means you are probably going to fast for road conditions
0helpful
1answer

When turning left,rubbing noise in front left wheel area, had brakes & brake pads checked not a problem, also when go over a bump in road the check traction system light comes on( will go off &...

Since you indicate a rubbing noise and not a grinding noise when turning left ... check that all the plastic wheel well liner pieces are in the correct place ...including any access doors (if there are any).
It is difficult to say if the noise is related to your ABS/traction lights going weird while going over a bump. Usually this type of light issue means there is a partial bad electrical connection somewhere between the sensor on the wheel and the controller. It could be at the sensor or in a line connector somewhere.
I assume your brake person verified that the sensors are OK
0helpful
1answer

Rr.ABS and the brake lights on

I have a Chrysler sebring 2004, the ABS and traction control light has come on the dashboard display plus I have now no heater. I think it is a blown fuse but not sure
1helpful
1answer

Traction light stays on as well as my abs would come on and stays on and clicking noise during braking.

Sounds like you have a problem in the front brakes or a front wheel speed sensor. A common cause for a Traction light is a faulty front ABS wheel speed sensor or harness. When the Anti lock brake computer sees a problem in the ABS syetm, it disables traction control as well.
1helpful
2answers

'98 Windstar ABS and traction control lights after getting brakes done

Prior to the brakes being replaced you more than likely had metal to metal contact which can throw metal shavings on the ABS wheel sensors. This metal shavings stick to the road grime on the wheel sensors showing the ABS computer a false reading making the ABS light come on. On Ford Windstars, the ABS light and the traction control light are on the same circuit. A simple (and cheap) fix is to pull the ABS wheel sensors and clean them with brake cleaner or throttle body cleaner. Make sure you dry them well and reinstall. On the Windstar there is one bold holding the sensors to the back of the wheels. I recommend you spray some WD40 on the bold and wait about 10 minutes before removing.
If this doesn't fix the ABS light and brakes, you can have the ABS system diagnosed at a shop for about an hour labor. (Usally about $100)
I have fixed many of these type of problems just by cleaning the ABS wheel sensors. Good luck.
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