Traction control light comes on when wheels are not skidding
Traction control light comes on intermittently even when the rear wheels are not slipping.
The traction control system can be turned off when this happens and this stops the system from coming on.
This is in a 2003 Mercury Marauder.
What could be the problem ?
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Re: Traction control light comes on when wheels are not...
The major difference in the tire size is enough to cause the traction control to activate the car sees a speed difference between the front and rear tires and thinks it is slipping it will continue until you replace the other two tires
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What it looks like:
The traction control warning light typically takes the form of the acronym "TC." Sometimes this light is a small illuminated picture of a car losing control
What it looks like:
The traction control warning light typically takes the form of the acronym "TC." Sometimes this light is a small illuminated picture of a car losing control.
How this system works:
Traction control uses wheel speed sensors to detect when one or more of the car's wheels lose grip and traction. When the system registers a loss of traction in one or more of the wheels, a computer will limit power to the wheels that are still in solid contact with the road to prevent a skid.
Common reasons for this to happen:
ABS is malfunctioning: Traction control and ABS (anti-lock braking system) often share the same control module and internal self-diagnostics system. As a result, sometimes an issue in the ABS can trigger the traction control light. If this is the case, then both the ABS and Traction Control lights will be on.
Broken wheel speed sensors: Wheel speed sensors are usually in the wheel bearing assembly, and determine the rate at which each wheel is moving. The sensors relay that information to the traction control module, which determines whether or not power needs to be shifted. Wheel speed sensors can get dirty or damaged and stop working, which prohibits the traction control module from knowing when to enable the system.Traction control module is faulty: The traction control module - which, again, is often shared with the ABS - can malfunction and break altogether, causing the system to stop working.
What to expect:
A top-rated mobile mechanic will come to your home or office to determine the source and cause of the traction control issue, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.
How important is this service?
It's important to have the traction control issue investigated as soon as possible, as adverse driving conditions can arise at any time. While your car is unlikely to incur further damage from a faulty traction control system, it won't be safe to drive in rain, snow, sleet, or other inclement weather, or even possibly through pools of water on the road. Furthermore, the issue that is causing the traction control light to illuminate could also be impacting the ABS.
The parts-store gave you the wrong part. If you still have it, take the old part with you to the parts store. Just match it with the new one before you pay for it.
As for the traction-control matter, the difference has little to do with the master cylinder. In traction control, a computer and wheel-mounted sensors keep the wheels from skidding by turning the hydrolic pressure on and off to the individual wheels according to which one is or is not skidding.
One or more of the sensors in the wheels that are responsible for these functions is faulty. It is sending a signal that is mucking up the calculations that control the brakes and engine for traction control and anti skid. All of them need to be checked!
There is a malfunction in you antilock brake/traction control system. When the TRAC light is on, the computer is trying to tell you either 1. That the traction control is active and is controlling your brakes, engine and transmission to stop a wheel skid, or 2. There is is a malfunction in your traction control system.
In the first case above, the TRAC light will only be on for a few seconds until the conditions causing your wheels to slip no longer exist. If the light is staying on even though there is no way your wheels are slipping or skidding, then this is a malfunction. You must scan both your Powertrain Control Module (PCM) and your Antilock Brake System (ABS) module to properly diagnose a problem with this system.
It is very common for all of these lights to come on all at the same time. They are all related to your Antilock Brake and Traction control system. ABS = Antilock Brake System, TRAC OFF = the traction control system is disabled - either because there is a malfunction in the ABS system or you have turned off the traction control button. VSC = Vehicle Skid Control. - (which uses the ABS and the Traction Control to function.)
The most common cause of these lights coming on is one or more defective wheel speed sensors. Although there are many other possible causes as well. Your ABS and Traction Control system must be scanned for fault codes to diagnose the problem. If you had damage to your wheels/axles during your "fender bender" this may have something to do with it. Otherwise it may just be coincidence that part of these systems failed right after your accident.
A good way of testing the traction control is to stop on a slippery road and then take off fast as to spin the wheels there when wheels start to spin the traction should activate and stop the spinning wheels you may hear it kick inand a light on the dash will say trac active or trac on, as far as sliding when stopping this is where the abs would come in,abs anti skid brake system, this system when you are braking would release the sliding or skidding wheel and you would felt it in the brake pedal, good luck, hope this helps.
Per your description, it sounds as though there may be a wheel speed sensor problem or a tire that is low on air pressure.
The traction control system on your vehicle relies on four wheel speeds to determine if the vehicle is in a skid or not. If the traction control system sees one of the wheel speeds lower or higher than the rest, it thinks your in a spin or skid and will reduce power to compensate and straighten the vehicle.
So, first thing to do is check all four tires and make sure they are at the same inflation rate some where between 28 and 32 lbs.
Next, disconnect the negative battery cable for 5 minutes, this will clear the module and let you start fresh.
Try that first before any parts are replaced.
Good luck and let me know.
that is what it is desgined to do - reduce acceleration and apply the brakes intermittently when the wheels spin. You have a switch you cn push to disable it. You need to disable each time you start car. See owner manual.
06-10: Traction Control
1996 Contour, Mystique Workshop Manual
DESCRIPTION AND OPERATION
Traction Control System
The optional traction control system is designed to control wheel spin when accelerating on slippery or loose surfaces. Traction control system is available only with anti-lock brakes.
The traction control system includes the following components:
Hydraulic control unit.
Throttle control actuator (9N825).
Traction control switch.
Traction control warning indicator.
Front brake anti-lock sensor (2C204).
Rear brake anti-lock sensor (2C190).
The traction control system operates as follows:
System functions by transferring torque from the spinning wheel to the wheel with the most traction.
This is achieved by applying the brake at the spinning wheel through the hydraulic control unit or reducing the throttle opening.
Traction control braking and throttle control occur at vehicle speeds up to 50 km/h (30 mph).
At vehicle speeds above 50 km/h (30 mph), only throttle limiting control is used.
If speed control is operating when traction control system engages the traction control system will disengage speed control through the use of a speed control relay. This action is the same as applying the brake pedal with speed control engaged.
Traction Control Switch
The traction control switch is located on the instrument panel, left of the steering column.