Please Help Prius 2004 MFD Very Slow

Sorry, I should have specified that this IS from the 2004 Prius manual. (my manual in the US).

I have a 2004 Prius, my original MFD worked, but the screen was heat damaged and the top coating had bubbled up off of the screen making it very dark--everything still functioned (the bubbling was on the screen not the touchscreen on top) and I don't remember it taking 3-5 minutes to "start". I replaced my original MFD with one from a 2004 with navigation, that gave me a clear screen, but came with extra buttons I could not use. Again, I don't remember it taking more than 20-30 seconds to "start". I later found a 2006 in a pick-n-pull, got the high-res MFD and backup camera from it, re-wired my MFD plug for the 2006 MFD. Again, I don't recall any difference in "boot up" speed between the 2004 MFD and the 2006 MFD, but I can't say for sure (I re-wired the MFD plug, so I can't just throw the 2004 back in to check--BUT, I think that it takes about the same time to "start" as the 2006, 20-30 sec max.)

There is a VERY REMOTE possibility that a fuse is partially burnt or has a lot of oxidation causing the problem, but there are so many other computer-based components on the same fuses that would also have problems, that possibility is near zero.
There could be electrical "noise" on the communication line between the ECU and the MFD (this is why I asked about the radio--it is on the same communication line, as is the climate control). If you are not having problems with the radio or climate control, then this is also not a likely cause of the problem.
That leaves the most likely cause as the MFD, as @JC91006 said (or possibly the MFD's plug and wire).
My next step would be to open the dash, unplug the MFD, inspect the wires and the plug, looking for dirt, rubbed off insulation, stretched wires or rodent damage. If everything looked OK, I would plug it in and unplug it several times (or get some electrical contact cleaner) to knock any oxidation/dust/dirt off of the connector and pins and try it out. Remember, that it will work better for a day, then degrade again.
While you have everything apart, get the part number off of your MFD.

I agree. Get a used one from a pick-n-pull junkyard if you can, or order one from eBay. Any MFD from any 2004-2005 will work (doesn't matter if it has the nav buttons), for 2006-2009 you would need a basic Prius without backup camera or Bluetooth (those use the same low resolution MFD as 2004-2005--navigation, camera or Bluetooth introduces the high resolution MFD in 2006 and later, that will only work if you rewire the plug).
The 2004 MFD part numbers (my original with bad screen and the plug-in replacement from the nav model) are:
86110-47080, 86110-47081 and 86110-47070 (w/nav buttons) (picture of my original damaged and replacement 2004)
Toyota updated the models, so you might see the numbers:
86110-47081-C0 and 86110-47071 (I think there was a recall or TSB on the original models years ago, these are the new, improved model numbers.)
EDIT: I wrote this before @Ray Moore chimed in--the bad solder joint is the problem I was thinking of here--reflow the solder on yours, or get a replacement.

 

I once reflowed the solder on a washing machine computer board that had a crack. I used 28x magnification to find that one and it was bigger than this one and at the edge of my skills to get it resoldered. It lasted less than a year and then I did it again and then replaced the machine. No technician would have soldered on a 200$ board. Too much risk and no reward for them.

On the Prius MFD I would be unable. I tried to find someone to do it back then and the cost was pretty high with no guarantees but then Toyota stepped up and took care of it. It helped to have a service manager that likes us going to bat for us.

 

@PriusProudOwner , you have the EXACT problem from that TSB, (I researched it last year, but forgot about it-- @Ray Moore has the correct answer!), all of the other suggestions are more like a 1% chance of being the problem, the bad solder joint is 99%.

 

There is a US-based repair service available for your MFD. Steve at www.autobeyours.com will fix it at a reasonable cost. Contact him. He is a reliable supplier of used Gen2 Prius parts as well as being more Prius knowledgeable than most Toyota technicians.

JeffD

 

The fuse is exactly the same, however the female connector inside the fuse box is slightly different, you should only use the correct LP Mini fuse. The "standard" mini that you have would be OK in an emergency, but I would not use it long-term. The cover may not fit over the taller mini, and, over time, the mini is more likely to get loose.

Unless you see a lot of oxidation, or a partial burn-thru inside the fuse (you can check with an Ohm-meter to see if there is any resistance) this is not the problem.

 

If you are handy with a screwdriver and careful about static electricity, I could pull the good circuit board from my original 2004 Prius (with the bad screen) and send it to you for the price of the shipping (mail from the US). All functions worked, the screen had partially melted in the Miami heat, where I got the Prius.
If you want the 2004 w/navigation buttons that I used for three months after I rescued it from the junkyard, I'd sell that for what I paid ($30 US) plus the cost of the shipping. (All regular functions work, if you press the Map or Dest buttons, it just shows a "no navigation" error, but was otherwise plug-n-play in my base 2004.)
BUT, both are original parts (not the updated design) and may develop the same problem in the future.
Edited to rescind offer.

 

Here is a link to the Technical Service Bulletin from Toyota that describes your problem: TSB EL002-05 (replacement was only free if you were still under the regular warranty) it describes your exact problem.
Here is a link to the topic in Prius Chat: TSB EL002-05 Multi-Display Functions are Inoperative
It will not hurt to change out fuses, but it won't solve your problem. Repair or replace the MFD.

 

see post #11.

 

That is an add-on for the radio to allow an ipod/smart phone to plug directly into the Toyota radio. (This is why I asked about your radio early on).

 

hope so!