Question about 2003 Mercedes-Benz S-Class

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Repeated faults

My C class C200cdi has detected EPC,ABS,BAS malfunction with other faults like brake light indicator, Brake Lining jam etc. In Jan 2008 it was serviced with replacement of sender unit. But,now after 3 months same problem occured. Is it diagnosis is wrong or is there any other serious problem ?

thanks.
madhuranath/Bangalore/India
hsmnath@yahoo.co.in

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4 Suggested Answers

ilragatzzo78
  • 241 Answers

SOURCE: BAS ASR problem

ok, first you have to clear the codes.
in this type of cars you cannot clear codes with a regular obd II it has to be the factory scanner or similar. after you clear the codes drive it for a while. when light comes back on scan it again and that is going to be your true problem. if you replaced the switch but didn't clear the code the light will be still on because the computer doesn't know that you fixed the problem. so try it out and let me know if worked.

Posted on May 15, 2008

BearWeb
  • 357 Answers

SOURCE: Mercedes Benz C180 Fault Message Brake Assist.Visit Workshop BAS

Hi there

BAS is the Brake Assist System and if there is a malfunction it would only come into play in an Emergency stop while applying full pressure. BAS applies full braking force because people tend to lighten up their pressure on the pedal in these situations. I would suggest that the best thing to do is go to a Workshop or Service Center and have it checked out. Please remember to put a good rating on my profile.

Kind regards
Dustin Ellse

Posted on Jun 26, 2008

  • 6 Answers

SOURCE: BAS (Brake Assist System)

need to replace brake switch intermittent problem with them ....for lights bas, abs,asr,to go off..

Posted on Oct 11, 2008

  • 165 Answers

SOURCE: mereced m class, ets, epc, abs, bas lights all

brake swich to replace,located behind the brake pedal.

Posted on Apr 02, 2010

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2 Answers

What does EPC light mean on the dashboard


Probably 'Electronic Power Control'. Is your car a VW?
It's basically a sensor problem telling you that something is amiss. There's many sensors in the engine and also ABS. One of the sensors is indicating there's a fault on that particular system.

If the engine seems to be on reduced power it could be a throttle problem. Also check your brake light switch.

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Legend of Abbreviations. ABS Anti-lock brake system. TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module. TPMS Tire Pressure Monitor System, MIL Malfunction Indicator Lamp, CEL Check Engine Light.

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ABS Light is on dashboard


Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS, TPMS and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Anti-lock brake system. TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module. TPMS Tire Pressure Monitor System

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BAS (Brake Assist System)


need to replace brake switch intermittent problem with them ....for lights bas, abs,asr,to go off..

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Brake Assist System


The brake light switch is the most common problem. Cheap & easy to replace as a first point. If this doesn't fix it you will need to get the fault codes read from the ABS system. Hope this helps & good luck !

Sep 23, 2008 | 1991 Buick Regal

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I have a 2003 GMC Savana Van. The brake light came on and the brake alarm rings continously but will stop if I hit a bump (and then start again if I hit another one). I'm thinking a loose wire but several...


If someone took the time to look at the electrical schematic you will see several grounds in the circuit My first place I would go would be to check all the Grounds and Connections for the Brake Fluid level control, Brake Warning Indicator
The Instrument Panel Cluster (IPC) illuminates the brake warning indicator when one or more of the following occurs:
  • The body control module (BCM) detects that the park brake is engaged. The IPC receives a class 2 message from the BCM requesting illumination.
  • The electronic brake control module (EBCM) detects a low brake fluid condition. The IPC receives a class 2 message from the EBCM requesting illumination.
  • The electronic brake control module (EBCM) detects a closed brake pressure differential switch. The IPC receives a class 2 message from the EBCM requesting illumination.
  • The EBCM detects an ABS malfunction which disables dynamic rear proportioning (DRP) . The IPC receives a class 2 message from the EBCM requesting illumination.
  • The IPC detects a closed power brake booster alarm switch and closed power brake booster fluid flow alarm switch. The IPC illuminates the brake warning indicator and sends a class 2 message to the radio requesting the brake warning alarm.
  • The IPC performs the bulb check at the start of each ignition cycle. The brake warning indicator illuminates for approximately 3 seconds before turning OFF.
  • The IPC detects a loss of class 2 communications with the BCM or with the EBCM.
Driver Information Indicators and Messages
The following indicators are used to inform the driver of several different factors.

Brake Warning Indicator
The Instrument Panel Cluster (IPC) illuminates the brake warning indicator when the following occurs.
  • The Body Control Module (BCM) detects that the park brake is engaged. The IPC receives a serial data message from the BCM requesting illumination. The brake warning indicator flashes at a rate of approximately twice per second when the park brake is engaged.
  • The EBCM detects a low brake fluid condition or base brake pressure differential and sends a serial data message to the IPC requesting illumination.
  • The IPC performs the bulb check.
  • The EBCM detects an ABS-disabling malfunction which also disables Dynamic Rear Proportioning (DRP) and sends a serial data message to the IPC requesting illumination.

Here is a description of how the system works But i would check my Grounds and connections
www.aceautomotive1.com
Contact me if you need any more information Ill be glad to help

Aug 01, 2008 | GMC Savana Cars & Trucks

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