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A speaker wire has a short-circuit, crossed, or touches the chassis of the vehicle it activates the protection mode function.
? Wire or insulate the speaker cable properly and press the reset button. If the "PROTECT" code does not disappear, consult your nearest service center.
I have attached a link for you which is for a free Kenwood KDC-MP443U instruction manual download. Nice receiver by the way! Kenwood KDC MP443U Instruction Manual
If this happened while playing music at a little higher volume, you must check the speakers for short in coils. disconnect the speakers to see if the protect condition changes, if so check the speakers and wiring. If not then you must have blown up the output IC or a power shorting within the set. You will have to remove the pcb disconnect the power to the output IC to confirm the fault. Helpful I hope. Good day
in front of your #1 preset button there is a reset button push it with a pin. if you made a pass # put it in if not page 12 show you how to make one if you want. reseting it should make it work if it dont you have a short somewhere start from scratch buy taking it out. I suggest you dont make a password till the short is gone. Mine did the same thing but because i was pulling to much power on starting my car with my amps.
i don't think it will blow the unit if swapped...both of them should have power (~positive 12volts)...in the red wire power is supposed to cut off when you turn the ignition key to off...and the yellow wire is supposed to have power constantly(memory)
You should disconnect the red wire that goes to battery. Leave disconnected for at least 8 hours so the player can reset. Most newer electroinics have these stupid protection systems that are way to touchy. I think companies just don't want us listening to loud music anymore.
This is a safety feature to avoid damage to internal components, the wiring must be shorting out to earth. Disconnect the speaker cable connector at the rear of the unit and try it, if it is ok then you have a speaker wire shorting out to ground. if it is still saying protect then disconnect the other wires one by one.
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