Question about Kenwood KDC-X890 CD Player

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HU Shuts Down - "Protect" Blinking

My headunit shuts down and blinks "protect". I reseted it and it does the same thing after a little while. Any suggestions would be appreciated!

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Re: HU Shuts Down - "Protect" Blinking

If it is only doing it over 30 then you need to turn down the bass level on the deck and make up for it with the subs sounds like its putting out too much juice. also if your car has a factory amp for your door speakers ect make sure that your factory speakers are the same ohms as the cd player which is 4ohm ,most fancier car speakers are 2 ohm. if that is the case the amp on the cd player is going in to protect mode to prevent frying your factory amp if you have one. check all your wiring from the cd player to the car and make sure it is all properly hooked up and there are no crosed wires. or wire hooked up incorrectly. also make sure the amp wiring kit is big enough gauge for the amp. make sure its not the amp that runs your subs that is cutting off the HU.

Posted on May 06, 2009

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Kenwood kdc-mp142 why does it shut down when

Have you checked your speaker wiring as it could be you have some wires crossed ie: negative feeding the positive side causing the shut down & check the Ohms if at high volume you are trying to drag to many Ohms it will also cause the built in amp to shut down to protect the system dont keep incresing the volume as the strain will do damage

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I bought a car with a KDC BT945U Audio Radio, but no manual. All it does is blink "Protect". It has a remote but pressing buttons on it doesn't change anything. Where can I get an...

The manul for the KDC-BT945U is available from Kenwood: . Click on the Manuals tab. The direct link to the English version of the manual is .

When Protect is blinking in the display, there is a short circuit in the speaker wire. Make sure that it is correctly installed and that the wire is not touching the chassis. Insulate the wire if needed. Then press the Reset button which is on the front of the main part of the unit (rotate the faceplate down) on the left side. (It's about where the source button is on the faceplate.) See page 70 of the manual for the wiring diagram and page 4 for a picture of the Reset button.

If the Protect message continues, you need to take it in to a service center.

I hope this helps.

Cindy Wells

Oct 08, 2011 | Kenwood Kdc-bt945u

1 Answer

The word "protect" is blinking and none of the

PROTECT (Blink): The speaker wire has a short-circuit or touches the chassis of the vehicle, and then the protection function is activated. Wire or insulate the speaker cable properly and press the reset button. If the "PROTECT" code does not disappear, consult your nearest service center.

Mar 26, 2011 | Kenwood KDC-MP342U Car CD Player

1 Answer

My system just stop working and its only blinking ocer

OCER indicates that the unitis in protect mode. First press the reset button (tiny pinhole button). If the unit comes back on saying OCER then most likely there is a short or a grounding problem with the speakers or speaker wiring. Disconnect all speakers and press reset again. If OCER still shows up the unit needs service. If not, connect each speaker once at a time until the unit comes back in OCER to narrow down the location of the unwanted DC signal.

Apr 02, 2010 | Kenwood KDC-MP235 CD Player

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So, I looked up the highest rated car installation business in Dallas, and had them install this unit. After installation, the unit worked GREAT, and with the new speakers, I was flabergasted(yeah, I said...

No!. If you disconnect it from power, you need the code to turn it back on. Check your manual before doing anything! that's the #2 problem reported on this site!. Chances are good that you have a bad wire at a door, or a bad speaker. Take it to the installing shop, they warranty their work. Hope this helps.

Oct 12, 2009 | Kenwood KDC-MP342U Car CD Player

2 Answers

My Kenwood KDC-MP232 entered "protect" mode, & I do't know why

This unit has an anti-theft program that is activated when a code is programed.

At this point forward, the power circuit is monitored, thus when the power is disconnected or drops below 12VDC it shuts down and the code must be entered to reactivate the unit and its functions.

Other circumstances that might trigger the anti-theft shut down are...

Bad power or ground connection to head unit.
A weak or faulty battery/alternator.
A blown fuse.
A sudden power surge, as happens when jump starting another car.

As for your personal 4 digit code, I cant help you with that but some high-end car audio dealers offer a diagnostic service that can reset a coded/locked out unit.

Good luck

Mar 23, 2009 | Kenwood KDC-MP232 CD Player

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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

Jun 23, 2008 | Kenwood KDC-MP205 CD Player

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My stereo is flashing the work "PROTECT" across the front

In a Kenwood deck, "PROTECT" usually means that one of the speaker output wires is shorted. The first thing to do is pull the deck and inspect the wiring at the back, making sure there aren't any pinched or exposed wires. If a speaker wire is pinched against the deck chassis, or bare wire is touching dash metal, it can cause your problem. If you don't see anything obvious, disconnect all speaker wires from the deck, then turn it on. If it still flashes "protect", then you have a defect in the unit. If not, then re-connect the speakers one at a time until you find the one that causes it to go into Protect mode. Usually if you don't find a pinched or shorted wire behind the radio, the problem can be found at the speaker itself. This is especially common if you've installed after-market speakers; if a speaker terminal connection has come loose and is now touching the speaker basket or mounting surface, it will shut down the deck.

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