bas/asr light clk 230 komp 1999

[bulldog44]

hi

help needed please this is my first post bas /asr light on i was told this would definitley be your brake light switch u/s so fitted new bought from maindealer before locating back into position on brake pedal pressed plunger with finger checked light dident come on excellent i thought job done but before fitting back into position i pressed brake pedal you guessed it light back on so obviously not switch but somthing else can anyone help

thanks

 

[gworilla]

This light could be on for a number of reasons. I would suggest that rather than keep replacing parts, you hook it up to the diagnostic at your independant or main dealer and see what it reads back.

 

[gworilla]

Oh and welcome to the forum, by the way!!

 

[bulldog44]

thanks gworilla

looks like a diagnostic day out then £££:-(

 

[television]

The chances are that this could be a speed signal dropping out, and the sensor ring needs cleaning

 

[Ellsy Tanners]

If you have depressed the brake pedal without the brake light switch being in place then this will certainly bring on the warning lights as the control unit will get signals from the pressure sensor and not the brake light switch at the same time. It will think this is a fault.
Try fitting it all up as it should be and trying again

 

[hmang]

If you have depressed the brake pedal without the brake light switch being in place then this will certainly bring on the warning lights as the control unit will get signals from the pressure sensor and not the brake light switch at the same time. It will think this is a fault.
Try fitting it all up as it should be and trying again

I'm with Ellsy.....don't tell the missus!

 

[television]

I'm with Ellsy.....don't tell the missus!

A fine chance if only one has one to tell

 

[bulldog44]

hi ellsy and hmang

as i said when depressed plunger on switch out of situ no light on press pedal light comes on refit switch in position press brake pedal light on does this make any sense i think im confusing myself now but i will try again as suggested

regards

 

[bulldog44]

hi tele

give us a clue where is the sensor that may neeed a clean


regards bulldog44

 

[hmang]

hi ellsy and hmang

as i said when depressed plunger on switch out of situ no light on press pedal light comes on refit switch in position press brake pedal light on does this make any sense i think im confusing myself now but i will try again as suggested

regards

did you turn ign off before refit switch and press pedal

 

[bulldog44]

hi

yes im certain i did but the light is always off initialy when ignition is turned on but immidiatley comes on as soon as pedal touched

 

[Ellsy Tanners]

Hi there,
Tele is refering to the wheel speed sensors, and the ring gear on the hubs which the sensor picks up off.

So all fitted back up correctly igition reset and light comes on still when pedal depressed?

If its not the brake light switch then it must be another sensor relating to the movement of the brake pedal, either the bas diagphram sensor or a brake pressure sensor. these are replaceable.
Only other possible fault could be the bas release switch which is built into the brake booster and that will require replacing.
Maybe worth getting a diagnostic check to pin point which is at fault.

 

[television]

Just had a look, there are 50 fault codes for the whole system, As Elsy Tanners they will have to be read out, It could be an erase fault code only

 

[wgriffiths]

bas esp

hi m8 best thing for you to do is find an indipendent in your area with a star diagnosis machine we have one but are in warrington could be anything common faults with 208 are brake lamp switch water in bas esp control unit steering angle sensor wheel speed sensor water in can data blocks in foot well all need to be looked at by a mb technician you checked the basics? fuses etc