Question about 1992 Volvo 940

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Srs and abs lights are on are there any common solutions to this or does someone have a diagram that i can get to start troubleshooting

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  • Anonymous Mar 17, 2009

    will a generic scanner like the parts stores have work to read the srs and abs codes



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To troubleshoot the system is difficult without reading the failure "codes" Both systems are very complex and include some non-serviceable "black boxes" . Unless you're an experienced technician, this is probably a dealer or independent Volvo specialist job to read and recommend the needed repairs.

The great temptation is to leave the lights on and continue driving but this could be dangerous. According to my Volvo dealer, the SRS (Suplimental Restraint System or airbags) fault could result in the bags going off at random. The ABS (antilock braking system) light could be anything from the antilock electronics being bad to having a failed master cylinder.

Neither of these systems are easily "shadetree mechanic" serviceable and a wiring diagram by itself probably won't get you too far. Best to have a Volvo technician at least diagnose the problem. You can then fix, patch or ignore from there.

Another advisory just in case: Complex systems like these may have multiple problems. When the tech. reads the fault code, it's the first one in sequence. You may fix the first problem, only to have another pop up, just like peeling the layers of an onion. A good, experienced technician should have an idea of these possible secondary faults, so ask him/her!

Note: I'm not a Volvo employee and base this advice on my experience with these systems on a Volvo similar to yours. I do recommend a Volvo or Independent Volvo technician because the cars are complex. Someone who works on Volvo's everyday is more likely to know their idiosyncracies than, with all due respect, a mechanic at your local PEP Boys who must work on everything. Going with a specialist may be higher initially but you'll save in the long run by avoiding expensive guesswork, not to mention time and frustration.

Good luck,

Dr of Motors

Posted on Mar 17, 2009

  • Anonymous Mar 22, 2009

    Re: Generic Trouble code scanners at Auto Parts stores: Can they read Volvo service codes?

    Ans: Maybe, worth a try although most auto parts stores are oriented towards American cars.

    Dr of Motors



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