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MY KDC-MP3342U SUDDENLY STOPPED WORKING! IT JUST KEEPS FLASHING ...'PROTECT'! REPEATEDLY! HELP!

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Protect only comes on when an RCA is grounding out, speaker is blown or the speaker wires are shorting out. Check all your wiring on the head unit and see if all are insulated with tape or better and if there's an exposed wire, tape it up. Make sure that all connections are secured. Then double-check your fuses. Check all of your speakers and their wiring because going into protect mode is the units way of saying you have a problem with your speakers or wiring.

If your speakers and wiring all check out, disconnect your radio wiring harness, and then reconnect the harness. This resets your radio, and your radio should be working again.

If you need to enter the security code, try the default unlock code of 5227.

You can also try to reset your code if the default doesn't work. Try 'KCAR' or '3051'.

Posted on Jul 12, 2010

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Same problem protect keeps flashing


kenwood has an internal protection feature that stops the output of the speaker channels if there is a shorted wire or bad speaker. this happens for many reasons and is not always serious problem. you can reset the unit by pushing the reset button with the tip of a pin while the until is on. it is a very small black circle located somewhere on the front of the faceplate. it should go back to normal operation after rebooting. if the protect comes back, you need to take it to your nearst shop to have them troubleshoot your speakers and connection.

hope this helps

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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.

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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!

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Security


"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.

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