Question about 2004 Toyota Corolla
CD/Radio has intermittent fault: sound, CD and radio illumination fail after about 10 secs after ignition (digital display still working, still responds to controls). Any ideas?
I've now fixed two of these units and they both had identical problem and solution.
The problem was an intermitant fault, that after a random time, would result in a noticable snap and a failure of the sound system both radio and cd player.
Solution:- In both cases this is diy fixable with just some screwdrivers and a soldering iron.
First remove unit; this is done by unsnapping the two trims that house the face air vents this then exposes the fixing screws 2 at the rear 2 at the front, remove screws then theclimate control facia ,this allows the unit to come out far enough to unplug all connections both to the hazards ect and the radio unit.
Once out, remove the radio lid and the facia housing the controls, this just snaps out of retainers that you systematically release with a screwdriver. remove side supports marked L & R then this exposes a number of screws to remove including a small side panel that allows you to unplug the cd interface. Note ; it is not necassary to remove the cd player from facia plate. remove two screws exposed by removing control panel then remove ribbon from socket that supports lcd screen. This should then allow you to gently ease the radio unit clear of the facia plate and cd. Once clear remove all screws retaining back plate and pcb and lift pcb clear of case. Now viwed from the top and front you will see a heat sink that supports 4 big transisters , re-solder all legs of these transisters (3 legs each) this has cured the problem twice for me now. Assembly is reverse of reassembly plug in and check out those sounds,
Posted on Mar 10, 2012
You have to change main connector cable backside of radio
Posted on Dec 03, 2011
My radio does exactly the same. I it 'pops' as power/sound is lost to the backlight. Have you managed to solve the problem? I have seen posts on the internet describing the same issue - so i guess it is a common problem - but have not yet seen an answer. I have taken the radio out to look for the obvious loose wire but after fiddling about for a bit concluded a poor connection was not the issue and was some kind of internal radio fault beyond a simple DIY fix???
Posted on Mar 11, 2010
The problem i have is the following, on the screan there's a message that sais i have to put in a working navigation disc, now it's stuck on that screan, i cannot use audio (no more radio) or info or anything else. the disc reade hasn't worked for a few years now but this never gave problems using other functions.
Posted on May 13, 2016
I discovered that the ballasts for the fog lamps (part of sport package) we're putting noise on the 12v. No ballests, no problem.
Posted on Sep 06, 2015
Tried the solution Kevan Williams suggested, helped for a few starts then same problem occurred. Replaced these four transistors and this seems to do the trick. At least for a few days now without any issues!
Posted on May 01, 2015
I have solution! You need to change one chip wich is voltage regulator! I ordrered some more chips for my self and now nave few extra. For more information and instructions reach me by e-mail: email@example.com
Posted on Apr 27, 2015
I got this problem too!!! some one help us please!!!
Posted on Jun 30, 2010
Same problem with my radio.
Posted on Apr 23, 2010
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Posted on Jan 02, 2017
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