I have a c class w204.

recently I encountered weird some error messages on the dash AND THE AIBAG red light stays on.

 So I got the Icarsoft i980 and I scanned it .

it showed 2 major errors :

1- power supply is too high ( I can erase it from the scanner but keeps coming back after a while)

2- there is internal fault in control unit “airbag” ( I cannot erase this error from scanner )

 

i went to bosh service center and they put it on their own scanner and they told me I have problem with voltage regulator that needs to be fixed after that we will check if airbag RED LIGHT egoes off or we need to change the airbag control unit  located next to gear stick between seats

 I was so confused by their diagnostic so I went to another service center and they put the car on scanner and they told me to ignore the voltage thing and replace the SRS airbag control unit only.

I have read in some forums that high voltage could cause the car to turn off the SRS control unit to protect it and once the high voltage issue is sorted then the SRS will be back to normal.

 

please advise 

 

regards

 

 

 

Comments

The airbag module is very senstive to voltage. Yes, the light SRS light can turn on from low or high voltage. The code in the airbag module is telling you the same.

What I would recommend is to test the alternator. If the voltage is too high, address that problem first. Also, monitor the voltage on your car while driving so you get a better idea of whats going on. You can use a cigarette voltage meter.

I would not jump and replace the airbag module yet. Once you fix the voltage issue, see if the second fault can be cleared as well. If not, you can have a shop that specilizes on programing airbag modules, reset yours. Otherwise, if you replace the module, it will cost several hundred dollars.

Let us know how it goes.

Plain text

  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <blockquote cite> <code> <ul type> <ol start type='1 A I'> <li> <dl> <dt> <dd> <h2 id='jump-*'> <h3 id> <h4 id> <h5 id> <h6 id>
  • No HTML tags allowed.
  • Lines and paragraphs break automatically.
  • Only images hosted on this site may be used in <img> tags.
The content of this field is kept private and will not be shown publicly.

Disclaimer: Youcanic has made every effort to assure the accuracy of the information on this page. Neither Youcanic nor its affiliates assume responsibility for any loss or damage due to any errors, omissions, lack of information. You agree to hold Youcanic free from any liability arising out of the use of any information contained within. All pictures and references to trademarks and car names are for reference only and do not imply an association with the manufacturer. Consult your owner's manual or authorized factory manuals when performing repair procedures. By entering this site, you agree to our Terms & Conditions and Privacy Polity.