Instrument cluster shut down...




Today it was raining buckets. I drove about half a mile and suddenly all the lights in the dash cluster went out and all of the needles (tach, speedo, fuel and oil pressure) dropped to zero. The mileage indicator came (stayed) on (it had been on on the trip computer). The engine kept running and it drove like nothing was happening. I'm not sure what the gear indicator did. After 20 or 30 seconds, it flickered a couple of times then came back. The trip computer (miles, mileage, mph and time) reset as did the same display that is supposed to be only manually reset. This repeated two more times, minus the flickering, on a 1 mile trip. On the return trip I had my phone ready to record it, and nothing went wrong.
Should I worry? Should I try to scan it for codes?
TIA,
John




My initial thought was "something electrical got loose", but if a power off on cycle happened, it maybe more likely it's related to the ECU.
Certainly might be beneficial to run a scan 👍




Checked for codes. There was something like C15000 - lost communication with instrument cluster. Several others related to steering column functions, specifically turn signals and gear selector module. Can't figure out how to view the log from the scanner
.I once said I never wanted to deal with a car with ignition points again, but I'm rethinking that...




I would hope they are hard-wired , but who knows these days.




My guess is some circuit lost power and affected the cluster and steering column. Why, and whether or not it had anything to do with the monsoon, I'd like to know.
Certainly it's hard-wired. The word "communications" does not imply, in any way, the technology used for the communications. Could be copper wires, light pulses, Radio Frequency, a cable on pulleys, varying hydraulic pressure, waved flags etc. etc.
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The temperature when it happened was above 50 degrees F. (6 hours later it was closer to 15 degrees...)
The battery was replaced in January of this year with an Odyssey battery and I have a volt meter in the cigar lighter socket. Everything seems normal. I didn't think to look at the voltmeter when this was happening.




I would check the SAM for corrosion.




We had our last sub-freezing night last night, but it's up to 72°f here in Magnolia TX. 👍Anyway, back last Fri or Sat, I made a trip to the grocery in about 34° outdoor temp (prob 1pm or so), and had no issues (2014 GLK350).








I found this quote in an article:
"They are usually super reliable and make your car more reliable…unless they get wet."
... found here
https://atlanticmotorcar.com/casestu...ing-sam-happy/




When I started working on cars the most complex piece of electronics was the AM radio. When I stopped doing it professionally, oxygen sensors were the new, state of the art thing and 1200 bps (baud) was a high speed data link.
Last edited by John CC; Dec 28, 2022 at 02:28 PM.
We had our last sub-freezing night last night, but it's up to 72°f here in Magnolia TX. 👍Anyway, back last Fri or Sat, I made a trip to the grocery in about 34° outdoor temp (prob 1pm or so), and had no issues (2014 GLK350).









