Question about Clarion CZ500 Car CD USB MP3 Player

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My Clarion CZ500 came up with an error that said "MCU UPG", drained my battery over the weekend, and now it won't turn on. How do I fix it?

While driving around in my car all of the sudden the display on my Clarion CZ500 said, "MCU UPG", and then stopped working. This display message stayed on even after turning off the car. Over the weekend it completely drained my battery at which point the display turned off. I charged my battery back up again but the unit has never turned back on since. How do I get it to turn back on? If I can turn it on then maybe I can follow the instructions here: http://www.fixya.com/support/t7406502-mcu_ulg_error_code_cz500_clarion_radio P.S. I bought the unit new from an online retailer, so I can't return it to an 'authorized Clarion retailer' under warrenty.

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Just had this issue on my CZ500 today. Clarion said my only option was sending it in for service.

I had it professionally installed, it's worked perfect ever since, and this error message pops up all of a sudden killing my stereo.

Posted on Sep 22, 2015

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Call Clarion 800-GO CLARION That's what Im doing right now!! GL

Posted on Oct 12, 2012

  • myson45
    myson45 Oct 12, 2012

    Call Clarion 800-GO CLARION That's what Im doing right now!! GL

  • myson45
    myson45 Oct 12, 2012

    Also I called a local dealer in my area and he said that I have to bring him the deck and he has to send it off to California pay them 200$ + 10 shipping fee, then I ll get me deck back, what a bunch of b/s! Clarion had to know about this problem.

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1 Answer

Where do I find the MCU on my Kenmore h2plus washer?


  • 1 Check for any error codes in the Estimated Time Remaining display. The code "F20" indicates a water inlet problem. Press the Stop button twice to end the cycle and check that the faucets are turned on fully. Take a look at the inlet hoses. Close the valves and unscrew them. Look for any clogging on the screen and clear it.

  • 2 "F21" indicates a draining problem. Again, press the Stop button twice and take a look at the drain hose. Make sure it's not kinked, frozen or clogged.
  • 3 "SD" on the display indicates the machine has gone into its Suds Routine. The Suds Routine removes excess suds so that the garments rinse properly. It's not a problem, but can be an indication you've used a non-high-efficiency powder. Just let the SD routine complete and the draining will continue.

  • 4 Make sure the washer is level if it gets noisy or vibrates too much. Use the leveling feet to adjust the level. They screw and unscrew for adjustment. Make sure the shipping bolts were removed from the back of the machine if the machine gets too noisy. See the "Removing Transport System" section in the instruction manual.
  • 5 Check that you are using HE detergent if you spot leaks. Check that the fill hoses are tight and that the drain hose is secured to the drain pipe. Check that the drain isn't clogged.
  • 6 Make sure the load is balanced if the washer won't drain or spin--or if water remains in the washer. Redistribute the load.
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    Jan 09, 2011 | Clarion CZ500 Car CD USB MP3 Player

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    I was driving and my cz500 clarion in dash threw some code and stopped working, i tried resetting it and now it wont turn on, what should i do?


    What was the code? was it something like mcu ulg? the same thing happened to my stereo. i have the same one. I called the people who installed it but they said they have no clue about what i am talking about.

    Dec 18, 2010 | Clarion CZ500 Car CD USB MP3 Player

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    Clarion came up with code not to sure exactly but had two sets of three letters, such as "MCG U.." something like that and then did not turn off. finally got the cords out of the back and now does not turn...


    I had the same problem and the dealer that sold it to me said to check the fuses. That happened to mine when the temperature hit minus 40. Have you fixed the radio?

    Sep 20, 2010 | Clarion CZ500 Car CD USB MP3 Player

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