Question about Kenwood 2005 KDC-MP5028 CD/MP3 ReceiverFree Standard Shipping

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Kdc-w4534 "Protect" is on the display and the stereo will not work. Please help

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Re: kdc-w4534

" protect " is flasing on my w534 cd player and my cd player will not work any more . any ideas

Posted on Dec 25, 2007

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Kenwwod KDC MP 543u Protect mode problem

This indicates a short in one of the speakers, or possibly the speakers are not wired correctly. Please see my tip at .
Correct wiring for 95 Corolla is as follows:

1995 Toyota Corolla Wiring harness, Kenwood wire color
Radio Constant 12V+ Wire: Blue/Yellow, yellow
Radio Switched 12V+ Wire: Gray, red
Radio Ground Wire: Brown, black
Radio Illumination Wire: Green, not used by Kenwood--please tape off
Radio Antenna Trigger Wire: Black/Red, blue
Left Front Speaker Wire (+): Pink, white
Left Front Speaker Wire (-): Purple, white/black
Right Front Speaker Wire (+): Light Green, gray
Right Front Speaker Wire (-): Blue, gray/black
Left Rear Speaker Wire (+): Black, green
Left Rear Speaker Wire (-): Yellow, green/black
Right Rear Speaker Wire (+): Red, purple
Right Rear Speaker Wire (-): White , purple/black

Dec 29, 2011 | Kenwood Car Audio Receivers

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

My w4534 keeps asking me to reenter the code . then it works ok for a while . but next time I get in the car I have to reenter the code

I contacted Kenwood who supplied me with a diagram showing how to change over the input leeds for the CDplayer and this solved the problem

Sep 29, 2009 | Kenwood KDC-W4534 CD Player

1 Answer


here is a link on how to reset your kenwood radio using a universal code from kenwood, it doesn't work everytime, but worth trying. you do need a kenwood remote though..good luck

Aug 12, 2009 | Kenwood KDC-W4534 CD Player

2 Answers

KDC-MP443U - flashes protect

I had the same Prob on my KDC 237. I hit the small reset Button on the front and it fixed it. Hope this helps.

Mar 03, 2009 | Kenwood KDC-135 CD Player

1 Answer

"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

1 Answer

How to get a display ''protect off of my car audio?

one of your speaker wires to the internal amp is shorted. turn power off and make sure they are not touching metal or each other and then hit reset again. if this doesn't help your power ic may be fried inside the stereo or a speaker is shorted.

Nov 29, 2008 | Kenwood KDC-MP435U CD Player

6 Answers

Protect mode

my stereo kenwood kdc-mp2032 is in protect mode, í lost my manual, and i don´t know how quit this mode. can yuo help me?

Jun 19, 2008 | Kenwood KDC-MP2032 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

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