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Kenwood kdc-mp5039u is in protect mode

Doesnt go away after pressing the reset wires shorting.

Posted by Anonymous on

  • Nadirsha Jul 12, 2019

    kenwood kdc-mp5039u doesnt go away after pressing the reset wires shorting.



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  • 2 Answers


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Posted on Jan 02, 2017


SOURCE: Kenwood kdc-mp"635"------ protect "help"

I have a kenwood kdc-mp635 and when i turn on my radio it reads protect...i recently bought it a month ago and it was all fine till a couple of days ago i was driving and it turned off and said "protect"! i reseted it and it worked for like literlly a minute then back into protect mode.. i check all my wires, amps, grouds, cdplayer wiring and cant seem to find the problem... before when i reseted it, it worked for a minute then went into it doesnt even turn on anymore all it does is reads "protect" i reseted it and still doesnt turn on after i checked all my wiring and stuck and in-need of help..i have no radioooo...!!! i dont know what else to do?????

Posted on Mar 03, 2008

  • 1 Answer

SOURCE: Protect Mode on Kenwood KDC-MP335

this is very simple to do just take your face plate off and were you see a red light blinking just get like a bobby pin or something and pit it through the hole and the radio will reset and that should fix your problem

Posted on Jan 22, 2009

  • 2 Answers

SOURCE: Kenwood KDC-X492 where is the reset button????

if you have the excelon
then its in between the aux input and usb interface

Posted on Jan 28, 2009

  • 1 Answer

SOURCE: protect mode

Press reset button (small circular button need something with a point) to the left of the 1 channel

Posted on Feb 28, 2009

  • 1 Answer

SOURCE: Protect mode Kenwood KDC MP438U in dash reciever

Anytime there is a short circuit or your battery down low enough you will recieve this signal. If you press the little "reset button" using a small pin or screwdriver your unit should reboot without the "PROTECT" signal. If seeing this "PROTECT" sign is a result of jumping your car, this will fix it. If the signal persists, then there is still a short circuit and you need to check your connection with the battery. Most likely it is touching the chasis or some othere metal.

Posted on Mar 29, 2009

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My Kenwood KDC-252U radio just started flashing protect on the screen.

Usually, when you see "Protect", the audio system has detected a short in the wiring. You'll have to check for loose or broken wires and missing insulation on wires that are touching anything else in the vehicle. Check all of the speaker leads from the wiring harness to the speakers.

If you can't find any wiring issues, press the reset button behind the faceplate. To take the faceplate off, press in on the upper left corner and then pull the left side away from the dash. Use a pen point or an unfolded paper clip to press the recessed button. It's below the CD slot a bit left of the center of the main unit.

If the "Protect" message continues, your CD-receiver requires service at a service center.

I hope this helps. You can see a picture of the location of the reset button on page 4 of the manual. You can find a copy of the manual from Kenwood support here: . The current link to the manual is .

Cindy Wells

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1 Answer

What does protect mode mean

If the radio is in protect it usually means you have a short or ground in the speakers or speaker wires. Sometimes you can reset the radio and it will go away. If all of your speakers and speaker wires check out and it remains in protect after resetting (you can reset it either by pressing the reset button if there is one {it should be a pencil tip sized depression somewhere on the face or a small hole with a switch behind it on the subpanel behind the face, or by disconnecting power to the radio.} then you more than likely have a bad output ic.


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Error message on screen will not go away

Hello bigdsketch,

The "DCER" error is caused by one of the speaker wires shorted or grounded or a shorted voice coil. Remove the speaker wiring one at a time to determine which one is causing the error, then repair or replace the defective part.

You may need to press the reset button (small recessed button to the lower right of the volume control) after the problem is corrected.

Hope this helps.

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Kenwood in dash cd player

The protection function is activated when the speaker wire has a short-circuit or touches the chassis of the vehicle. Wire or insulate the speaker cable properly and press the reset button. (The reset button is that little pinhole button below and to the right of the volume control). If you do this and the "PROTECT" code doesn't disappear, you'll have to consult a service center. Further, if you had this professionally installed, they should be obligated to fix the issue for you (hopefully).

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I have the same amp. Try leaving the batteries our for a while like more than a day. Also if you can join a wire from each battery terminal to the others for a while. That will short out the remote and 0 it. This should cure your problem. I have had to redo the remote many times. Also while the remote is out press all the buttons in as many as your can for a while.

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