Question about Kenwood KDC-MP335 CD Player

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Kenwood mpe system flashing protect

Hay i have a kenwood system in my car an havent had a problem today my sister drove it hit a pot hole as i have b4 but it never stopped playing in the past today it did an then started flashing protect an now i carnt stop this aan make it work again

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  • Anonymous Oct 30, 2008

    After playing a CD that was scratched pretty badly in my CD player, the display flashed the word, "PROTECT." Now the none of the settings work and it does not play any music or any sound what-so-ever. I've tried shutting off the car and I've tried other CD's...and it still will not work. Even the radio doesn't work. It just continues to flash "PROTECT" at me.



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"PROTECT" means that the unit's thermal protection units were activated, which in turn cut off output power to the speakers. The causes for this vary. Usually, it's a problem with the impedance load that the speakers present to the power amplifier inside the receiver. Occasionally, the circuit acts up and activates itself, or playing the unit too loudly has blown a fuse. First, check all the user servicable fuses. You'll find their location and amperage rating in the user's manual. If they're broken, replace them. Make sure that none of the bare wire from any speaker is touching any bare wire from any other speaker. If the unit still won't power up, then I'm afraid you'll have to take it into the shop for evaluation by a qualified repair technician. Best of Luck.

Posted on Sep 14, 2007


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I have a 2007 Pontiac G6, I hot a pot hole and the airbag light is on also both front seat seatbelts will not work how do I fix this problem?

You have a major problem. When you hit the pot hole a sensor for the airbag system got damaged. Need to have fixed ASAP WILL NOT BE PROTECTED IN A CRASH! Could have damage the seat belt mechanism

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My kenwood krf-v5300d overloaded? Stand by light flashes if pressed stops flashing if pressed again unit turns on but doesent pass start up and shuts off again havent managed to find a solution from bassic...

This unit is in what is called "protect" mode/ See the link below for an explanation of this. Specifically to your unit, the output components are unique to Kenwood and are not cheap. Further investigation to locate the reason for the protect mode will be necessary prior to any attempt to estimate the cost of repair. Something as simple as a missign voltage can cause this symptom.

Please feel free to update this with any other questions or concerns that you may have.



Oct 21, 2011 | Kenwood Audio Players & Recorders

2 Answers


protect mode means some speaker wires somewhere in the car are grounded out or are crossed... find the short and it will fix the problem. try testing all of the speakers one by one from the wiring harness... you'll find the problem. Good luck.

Nov 30, 2009 | Kenwood KDC-MP208 Car CD/ MP3 Player

1 Answer

Car Stereo in Protected Mode will Not Play Radio or CD

try the small reset on the lower right hand side of the player it fixed mine

Feb 03, 2009 | Kenwood KDC-MP228 CD Player

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"PROTECT" is displayed on the car stereo when turned on

This is really easy to fix. Look on the face plate for a REALLY small hole. Put the tip of a pen in the hole and it should work. This usually means the stereo isn't wired properly so if the PROTECT keeps coming on after you've re-set it, take it to a dealer. To make sure you're everything is in properly. Hope this helps...

Jan 26, 2009 | Kenwood KDC-MP228 CD Player

6 Answers

Security Code for Protect mode

Turn on the car so the radio is flashing "Protect." Look on the front / removable face of the stereo. On it you will find a small round hole - that's a reset button. Find a small paper clip, unfold the clip and stick it gently into the hole. The "Protect" will stop flashing, and Kenwood will be displayed. Unfortunately all your settings/presets will be gone, but at least the stereo is working again!

Apr 30, 2008 | Kenwood KDC-W3534A CD Player

2 Answers


"Protect" isn't for security on a Kenwood; it's caused by a problem with the speaker output. There may be a defect in the CD player, or you may have a blown speaker or a shorted speaker wire in the vehicle. Try disconnecting all the speakers and see if the unit still shows "protect" when you turn it on. If it still shows the "protect" message with no speakers connected, the unit needs to be serviced; if not, re-connect the speakers one at a time until you find out which one is causing the problem.

Aug 10, 2007 | Kenwood KDC-MP232 CD Player

2 Answers

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.

Jun 07, 2007 | Kenwood KDC-MP5032 CD Player

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