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Old 05-26-2003, 04:51 AM
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Join Date: Mar 2002
Posts: 59
Question SRS Light stays on

This just started happening today. The SRS light will stay on for a few minutes and then eventually goes off. Any ideas? Car drives normally whether the light is one or off.

1995 C36 AMG
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Old 05-26-2003, 09:23 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
When the light stays on for two minutes then goes off it is warning of a non safety related failure. The arirbags will still work but could use a different strategy.

The most common problem here is the selt belt buckles. The crash profile for airbag deployment is changed based on whether or not the seatbelt is on. so, the controller wishes to know. The two positions engaged or disengaged looks to the controller as two different resistances. it is not open or closed. if it could accept open as an answer then a disconnected (broken wire) buckle would be an acceptable sensor response. To avoid this and provide diagnostics the resistance of an open buckle is 400ohms if I remember correctly.

If the controller sees anything but closed circuit or 400ohms it sets the light. AS a result the airbag is probably deployed in the strategy for a seat belt not connected.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 05-27-2003, 11:56 AM
Registered User
Join Date: Mar 2002
Posts: 59
Is there anyway to test this without having the diagnostic computer? Would cleaning the buckles help?

1995 C36 AMG
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