I HAVE RECENTLY DISCOVERED BY TALKING TO SOMEBODY THAT SUCCESSFULLY REPAIRED THEIR ECU THAT THE RESISTORS DO NOT NEED TO BE REPLACED! THE PROBLEM IS A …
HOW TO FIX RAV4 ECM ECU TRANSMISSION PROBLEM. **READ DESCRIPTION!**
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One of problem is the ground connection at the left corner near the plug. I
have had a lot of visible electro corrosion and in a result I have got bad
contact there
I found a place on ebay AUTO MODULE SOURCE they sent me one for $158.00
I installed the new one which lasted about two weeks before it started
acting up, the lady I spoke to said there could be a variable solenoid
that’s bad or something causing the computer to short out, anyone have any
experience with that?
So the scanner is telling me it’s a shift solenoid, either #1 or #2, but
maybe I should re-solder the resistors on the ECU first to see if codes
disappear? Also, does the rav4 have to be re=programmed to turn off the
service light, or does it relearn or shut off through the code scanner?
It’s my friends son’s suv, and I’d hate for them to buy a $150 solenoid
only to find out they did not need to spend the$$
Do a resistors test if ya not sure if it’s bad or not…
Well its been a month now and its working great. So for me that confirmed
it. “Bad Solder Joints.” Thanks jake moon. Well made video and it saved me
time and money. You could probably just reflow the solder for a short fix
but I replaced the solder on those resistors in the video. Can’t thank you
enough….
Fixed mine.
Hey Jake, I am having this same shifting issue with my 2003 RAV4 – Chili. I
took it to a mechanic and after checking the code he said that this was a
Solenoid issue in the Transmission. Was this the case with you too, before
you decided to take a look at the ECM?
Cheers
well sorry but there is absolutelly no usefull information in this video
excpet the catchy title Nice of you 53.000 suckers including me have been
watching your video
100/100
Hi jake, thanks for your information, I could repair my rav4, if any more
selfless people like you, our world would be better, greetings from Puerto
Rico
OK, I had serious reservations on this task. Reading the comments only
vulcanized my feelings, but decided it was well worth trying as the ECU was
coming out anyway.
The PC board looked brand new coming out of my 2003 RAV4, so there was no
oxidation – very nice manufacturing quality, I might add. But, being a Sr.
Electronic Engineering Design tech, I’ve come across some ‘impossibilities’
in my debugging career, so if there are folks who said it work….I’m down
with that.
I did not stick to the few items mentioned by Jake – heck no. If I have an
intermittent, I will reflow the solder on ALL the components, if I have to.
But, I decided to stick with the high current items involving ANY of the
resistor packages described (1210, I believe: .12″ x .10″ – BTW, for you
DIYR’s – Digi-Key Corp is your ultimate friend for finding parts of this
nature). And, I continued to reflow the devices connected to said resistors
(reflowing all these resistors, of course): all power control IC’s (a
number of 20-pin (?) IC’s), and all power drive devices (black, 3 legged
parts with tabs solder to the board).
I just shoved it back in place after reworking for a test drive – and IT
WORKED!!!
Many thanks to you Jake for posting this. Otherwise, I would have spent a
couple, or a few Franklins on this fix!
One last word to the wise: if you cannot solder, meaning, if you don’t have
the proper tools to start with (small diameter soldering tip, thin gauge
solder, ample visual magnification), and you’re not experienced with PCB
rework – do not attempt to try this!! Soldering is not rocket science, but
debugging your rework error might be.
Thank you!
Repairing circuitry must be left to a professional. Sending that computer
to a shop for repair will give you a warranty. You are a cheat trying to
figure out what method is used to fix the computer and then blasting it all
over youtube. Identifix is another cheat program – soon enough an 8 year
old will be able to diagnose a complaint.. Give it time. Eventually, the
only expertise available to actually diagnose a problem will be a Dealer
and they do not share info at all..
I hate reading the comments cuz I watched the video and it seems promising
then comments are discouraging.
check engine etc, i would recommend them if you cannot do it yourself.
quick shipping and good product.
Not necessarily. The poor shifting issue will cause accelerated wear of the
friction material on the clutch disks so if you drive it long enough it
will damage the transmission internal components. The ecm controls
electronic solenoids in the trans. The solenoids cause gear shifts by
manipulating the pressure and flow path of hydraulic trans fluid to the
clutches. Get your ecm fixed first. Then if trans slippage is still present
you may suspect the transmission.
very true. this repair video isnt so much to help you save money as it is
to assist people who enjoy the satisfaction of doing it themselves such as
i do. if you have to google “how to solder” or have to look up how to
remove the ecu from the vehicle then this is not something you should
attempt.
Jake hi I live in Chile South America and I have the same problem with the
Toyota Rav4 2003. The models sold in Chile are different as those sold in
other parts. I own a electronic laboratory of computers so I imagine my
technicians can fix. But I can not find where to buy the resistences we
explain. I would like to get information please. Thanks. Please your kindly
answer to mu email gseguev@yahoo.es Thanks again Gabriel Seguev
Most problems with an ecu or instrument cluster or other circuit boards are
actually quite simple. The most common I’ve seen is broken solder
connections, bad resistors, and bad capacitors. But if it didn’t work then
maybe I missed something. I doubt it though because its much less likely
that the cause of the problem is actually two separate parts of the
circuit, since there would have to be no symptoms until both separate parts
of the circuit failed. I don’t think 50 miles is sufficient IMO
Do you know the ohms on those resistors?
On my Saturn it took about 400 miles to relearn the proper shift timing
after I replaced the pressure control solenoid; I was too lazy to put the
ecu into quick learn mode with the scanner. But believe it or not, I have
been known to be wrong from time to time so until I run into another one to
repair myself and verify it we won’t know for sure. Unless somebody just
pops the cover off of their repaired ecu and takes a look.
@mangofever233 820 is 82 Ohms, R330 is 0,33 Ohm. On my ecu there were fine,
resoldered it and almost rest of the board without luck, any other ideas?
@TheManAzz hmm…the only thing i can think of at the moment is that the
ecu needs time to relearn the proper shift timing etc. as this shifting
issue starts to occur, the ecu will increase/decrease the transmission
shift adaptive values to try and correct for it. the high resistance to the
solenoids will cause the shifts to be longer (the ecu measures the time it
takes for the trans to shift by comparing input and
This fix wont work dont waste time. You must replace the solenod drivers in
the computer! You do not have to change the resistors!
ESTIMADO AMIGO USTED POR CASUALIDAD REALIZA ESTAS REPARACIONES A ESTOS
EQUIPOS, SI ES ASI A DONDE SE LO PODRIA ENVIAR EL ECU
way is to simply drive the vehicle. on most cars it takes about 100 miles
for the transmission to relearn these values without starting the relearn
proceedure using the toyota scan tool. (as far as i know, only the toyota
scan tool has this capability) The distance required will vary quite a bit
on the type of driving. i would guess it takes about 30 times of stop,
acclerate, cruice in high gear half a mile, repeat. so, that is my
recommendation to you. i am quite positive this is the
What are the beige/tan rectangular individual chips on the board??? How can
they be tested? Is there any good websites for learning this kinda stuff??
Thanks
Im about 90% sure the 820 is .82 ohms and the r330 is .33 ohms. I found
that info while searching for replacement resistors. I think they are .5
watt, but may be 1 watt. If your good at Google searching you should be
able to find them. They are not common though; I only found one distributor
on the whole net.
You may be able to use multiple higher impedance round resistors to work
instead because they are easier to get. E.g. two ten ibm resistors in
parallel equals one 5 ohm. But there is also the issue of wattage.
To get the value of the ohms on the resistors you go as follows: you get
the first 2 digits for the value and the third digit determines the number
of zeros that you add to the value The ones on the board with the 820 are
82ohms if they were 821 they would be 820 ohms. These type of resistors are
harder to find than regular resistor (thru-hole) butt they can be replaced
with thru-hole as long as the resistance is the same.FYI they have no
polarity.
hello roger aguirre of Nicaragua I have a 2001 rav4 with faulty ecu with
the same fault, I would like to get in touch via email to see if I could
provide more information on how to repair my ecu is already the second that
I damaged the previous the U.S. for repair. Thanks I hope I can help.
Does a bad ECM mean the transmission is bad too or just the ECM?
what company did the repair? thanks in advance.
output speeds) and therefore it will apply the shift solenoid sooner or
increase the line pressure or both. if, by resoldering the resistors you
correct the high resistance issue, the adaptive values will be far from
where they should be. there are two ways to correct this. one costs
money-go to the toyota dealer and request that they perform the
“transmission adaptive relearn proceedure.” i am not telling you to do this
because they will charge you at least 40 dollars for it. the free