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Well, I'm here almost a year later, and I've been battling the same error code from last summer: the SRS light was on, it gave the same error code (5 flashes), and I could not reset it.
To resolve the issue last summer, Dave helped me narrow things down. I cleaned up the connections with some CRC cleaner, and everything was great. And in my infinite wisdom (and perhaps stupidity), I added Bundy Penetrox to the orange connectors thinking it would prevent any further issues with connectors. Everything was great until mid-June when the light and code returned.
Here's what I did to find a cause:
- tested the resistance at all the orange connections back to the crash sensor. Greenbook says it should be 200 ohms. I was getting about 201 to 202, and I figured that was within my range of precision.
- Inserted a 2-ohm resistor in place of the airbag (there is a Volvo tool that can be found for about $40USD online but this was a cheaper option) - code would not erase.
- Unplugged the clock spring at the steering wheel, inserted a spare, and connected the airbag - code would not erase.
- Unplugged the orange connection near the transmission tunnel, inserted the spare clock spring, and connected the airbag - the SRS light reset itself! (I did not know it could do that) Now we're getting somewhere. Since I knew I had connectivity from the clock spring back to the crash sensor and reasonable resistance, maybe that Penetrox goop I used was adding just enough extra resistance to throw the testing off.
- Cleaned all the orange connections with CRC electrical connector cleaner to remove the Penetrox, and connected the airbag - the SRS light has remained off.
I'll put some miles on over the next few weeks. And I'm wondering if the Penetrox is not good for gold-plated connectors. Now that I read the bottle more closely, it says for AL/AL and AL/CU connections (aluminum and copper). Gold is not specified.
Anyway, I hope these insights add to the community of knowledge. Feel free to pile on.
Thanks.
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