1994 Toyota Camry ECU Repair High Idle Attempt

[@jerryspann8713]

Found a photograph of that board and that capacitor coming off ic101 is an A3

[@frankierutherford1888]

Mine explorer, audio, Tv repair, automotive mechanic extraordinaire and a pretty cool friendly guy. I appreciate all you share with us. Thanks

[@waltschannel7465]

Seriously. What DON'T you do? 😊

[@airplaneengine]

Have to add plumbing and refrigeration to that list too.

[@ixionn563]

Pretty sure he might be a landlord as well.

[@enricopolazzo33]

This is the future of auto repair.

[@KameraShy]

No ... in the future all parts will be serialized to the specific car. You won;t be able to go to ebay or the junkyard and find another ecu - or anything else - that will work. You will have to take it to the Stealership and pay thousands for a new part and have it "reprogrammed."

[@volvo09]

That's only fixable because it's 25 year old! The new stuff is microscopic. Like laptop motherboard stuff.

[@enricopolazzo33]

@@volvo09 yeah I’m not even thinking about the newer stuff. It would be a hopeless effort.

[@tschuuuls486]

@@KameraShy It's a good thing the shop software for most mid 2000 cars floats around the internet. Coding BMW and VAG parts is fairly doable for example.

[@moviemania1137]

Laugh in Japanese motorcycle.

[@fisqual]

I did a 93 V6 Camry ECU about a year ago. Instead of the idle at full bore, one of the injectors was shorted on. Car still ran but was getting less than 1mpg!! I replaced the caps, cleaned up all the juices and it's been great ever since.

[@ivanjulian2532]

How interesting. I have a 92 Lexus ES300 with the same 3VZ-FE in it. I've owned it since new and I'm super fastidious regarding my cars and motorcycles. Recently I too have experienced similar "inexplicable" fuel consumption issues, but dopey me I changed every single possible part in the engine bay, thinking I was solving the problem! Eventually I whittled the problem down to just 2 remaining possibilitiess.... it's either the air flow meter, or the ECU. And that's how I ended up replying to your comment!

[@Duhb0rg]

Where can I buy good caps

[@Anthonytheredneck]

​@@Duhb0rgdigikey, or mouser

[@phillanassa759]

I didn't know you were a CA. State emissions tech, I'm a Maryland Emissions (Certified Repair and Test) tech. Shango's more than just Tv's and Radio's, he knows his stuff. Those numbers look great. Idle speed motor counts will tell you if the computer is compensating for AC request, minimumair rate on the throttle body might be set too low. The emissions numbers look stellar.

[@shango066]

TVs and radios are a hobby. They were in the income in the 90s

[@bigliftm]

perhaps its time to show your face Dan ( shango ) yall got lots of fans.. nothing to be ashamed or affraid of .

[@LestonDr]

@@shango066 Your like the shop teacher we've always wanted! Thank you

[@scottcol23]

@@bigliftm you can see his face on his "mine explorers" channel. (also great videos) yes he also explores abandoned gold mines

[@Mister_Brown]

gotta realize you're probably looking at a California emissions car with extra emissions gear and higher cat load than the east coast cars. definitely good numbers for such an old car i wonder if it's the original cat.

[@stevexray6253]

When the new ECU arrives you can check the value of the little capacitor for future reference or maybe repair the old one for future use.

[@Choober65]

Here's a little trick to trace internal traces. Inject a 100KHz signal into the trace then use an old hard drive head hooked up to an oscilloscope to locate the trace inside the board. Crude but it works.

[@erikj.2066]

Funny for me to see a ‘94 still required to have an emissions test. The emissions program I work in gave up on the dynos in 2008, since pre OBDII cars made up such a small percentage left on the road here. Everything we test is OBDII plug in, sans heavy duty diesel, which gets an opacity test back to ‘84 model year. The state has an exemption cut point for OBDII cars at 15yrs old, as they figure the repair parts for emissions issues might be obsolete, and anyone driving a vehicle that old may have financial difficulties covering the repairs anyway.

[@moviemania1137]

He's in Commiefornia. We don't even have emissions testing in my state.

[@v12alpine]

In cali, 1999 and older gas get the sniffer and rollers regardless of OBDII status. MIL light on or more than one monitor not ready is an instant failure. 1997 and older desiels have no smog testing which is why I love my 96 RAM 12 valve cummins :).

[@CLUBNEON-m6i]

Had the same issue with my 93 Fiat Tempra, high idling and it does not idle good when the ac is on. It had two leaky capacitors on the ecu and I could fix thanks to you! I could never imagine capacitors on ecu's go this bad. As far as the idling issue, it was just a corroded ground

[@krz8888888]

You need to change all the capacitors and install a 3 wire power cord for safety

[@waltschannel7465]

Good one!!!

[@NickG123]

@That Guy, Don't be THAT GUY! ha.

[@jrs0007]

especially those wonderful chip capacitors

[@cardboardboxification]

always replace the death cap

[@godfreypoon5148]

Yeah, what a schmuck. He should have done that before he even plugged it in. And I didn't see him bring it up on a variac... Irresponsible.

[@TheGuitologist]

In situations like that with that unknown cap, I’ve always googled the chip it’s connected to and looked up typical circuits. And as soon as I type that comment you say the exact same thing.

[@GrandsonofKong]

Only in California would a 28 year old car be expected to pass emissions testing. Thank the Lord we left years ago.

[@BenHelweg]

Lot of cars in California.

[@akshonclip]

Some states actually require it for cars 1968 and newer. California is 1976 and newer. The 1976 and newer law was signed by Arnold Schwarzenegger in 2005. It used to be a 25 year rolling limitation.

[@Suddenlyits1960]

@@BenHelweg There are lots of cars everywhere now. so? The percentage of nearly 30 year old vehicles on the road is so small it is irrelevant. Jay Leno was discussing this fact in one of his videos.

[@neil4306]

My father owned a 1995 Camry LE with the 4 cylinder. It was a Japanese built Toyota. It was the best vehicle my father ever owned. I did all the maintenance on it. Nothing ever failed. He passed in 2007. I sold it in 2009. Our road salt was eating the rockers. A guy bought it. Was going to fix it. He was going to sell his 1 year old Camry. The fit and finish on the Japanese built Camry was absolute profection.

[@williefleete]

I repair a lot of these kind of ECU’s where I work, I remove all the electros, scrape back the crust until I get clean copper, flux and tin the copper and use wrapping wire to repair any open traces

[@THOMMGB]

Hi, Just to be clear, are you saying you remove and replace all the electrolytic capacitors on the board? I've got a 4X4 1991 Nissan Pathfinder V6 with manual 5 speed transmission. My control unit is still working, but I thought I'd keep my eyes open for a spare one at the wrecking yard. Do I need to find a Pathfinder that's exactly like mine or can I buy a control unit from a Pathfinder with an automatic transmission, for instance? Thanks a lot.

[@williefleete]

@@THOMMGB sorry not sure, I think the ones that are auto have an extra IC for controlling the transmission but other than that they might be similar

[@swebigmac100]

Good repair. I fixed a broken pcm for a 95 thunderbird. Lot of fried smt resistors. I think i replaced 10 of them. No visible damage. Had to measure each one. Thank god for probemasters

[@mxsteven]

I do operate an ecu repair shop but for this case normally we refurbish it and rebuilt the thread pads. FYI there is still 1 broken thread which is for ACSW or ac switch request. Pay attention to the connector it does label all the connections there.

[@sphinxios]

I had similar issuses with mitsubishi ecu's with leaky electrolytics and it leaks under the coating had similar luck as you, could repair most of them. Sometime it did leak under those green biggish cap's too so unsoldering those was sometimes needed as well. That depended on how much and where it leaked. On those ecu's it broke connection between 2 ground planes so that made all sorts of weird issues. ps If i remember it right car had to run for 5-7 minutes for some reason after battery was disconnected i cannot remember why why it had to do that.

[@rrcoster]

Yup my 94 had same issue with my 1994 mitscubshi ecu glad plug and play. Just went to junkyard got another one

[@johnnytacokleinschmidt515]

16:10 if it doesn't drop then I think that's good. Turn steering lock to lock and see if it bumps up. If it does then I'm happy thinking idle load control is good. You are the man! I love the cross-over between electronics and automotives although it can be baffling and frustrating at times. But it sure makes the modern car amazing.

[@v12alpine]

Older toyotas and lexuses use a vacuum valve on the steering box to idle up the steering by leaking air past the throttle body. Unfortunately they tend to leak fluid into the intake manifold and onto the alternator. Best to just remove them and cap off.

[@johnnytacokleinschmidt515]

@@v12alpine Interesting. I don't remember encountering them. I remember Toyota cooling fans run with power steering fluid..... Eeesh! Really?!! 😆

[@OldSonyMan]

I spent 16 years working in a Toyota engine 'dress up line' fitting and connecting a/c compressors and so I know absolutely nothing except how to fit and connect a/c compressors, except for after the engine is installed into the car at which point, I know zero !

[@godfreypoon5148]

That kinda sucks. I am at the opposite end of the spectrum, in research and development. If management wants it, I need to figure out how, rain hail or shine. Doesn't matter if it's electronic, electrical, mechanical or chemical. It's demanding and I don't even get paid that much.

[@TheLawrenceWade]

1985 Pontiac Fiero 2M4 SE 5-speed, GM TBFI, "Iron Duke" Tech-4 Pontiac 2.5L engine: refuses to start from the starter, push-starts reliably. Great compression, good fuel and spark on cranking, but no start. Watching the 5V rail to the throttle position sensor, I found the 5V rail dropping below 3V as the starter hit compression strokes. I took apart the ECM (behind the glove box between the two seats), found a couple of bad capacitors with my ESR meter, replaced them. Worked perfectly after that; my theory is that the ECM was resetting every time the starter hit a compression stroke and the spark timing was way off during cranking. It was trying to start.... Electrolytics in cars have a bad life... Hot car in the sun, then start up and turn on the A/C, the ECM/ECU is usually in the dashboard and gets cooled by the A/C pretty quickly, then back to baking in the hot sun in a parking lot, then to the -30C weather we get here in Ottawa winters, then up to +70C in a hot car on a summer's day.... If you're restoring a car from the 1980s or later with any sort of EFI or feedback carburetor or original stereo, capacitors, capacitors, capacitors. :) Can you imagine how many cars a year must get scrapped due to weird driveability and emissions problems related to bad capacitors? Horrible waste because of a $2 part. I forget what brand of capacitors I found in the GM TBFI ECM, but the whole thing was built with good quality stuff as it must be - you don't want the car to stall out while merging onto a freeway or making a left turn. :) This wonderful tester I built nearly 20 years ago was what I used to confirm the bad capacitors in the car: kripton2035.free.fr/Resources/poptronix%20ESR%20Capacitor%20Tester.pdf

[@quantumleap359]

Looks like it needs a hard-start cap kit! Just kidding. Great video shang, I would have just gone the cheap $24 fleabay route. Fascinating video!

[@edmclaughlin4923]

I know it's your time and skillset. This is saving someone a few hundred dollars at least! Very Cool!!

[@TY-ob7fz]

And depriving the junkyard of another car dying prematurely.

[@edmclaughlin4923]

@@mayshack I don't know. It was magic!

[@melplishka5978]

Cap is only goin to store what it’s given. A little bigger is better especially for tipple concerns. Your good bro.

[@ronaldspencer547]

Most people would see the ruined electrolytic and just order a whole new part. Trying to repair the old one requires too much work! Of course it looks like you fixed it though. I bet the ebay unit works the same.

[@westelaudio943]

There's only a limited amount out there and that replacement one might be faulty or failing as well so this is the much better option.

[@TheDc1984dc]

I was a lead diagnostic tech at Cummins. We had schematics for everything outside of the ECM. All ECMs were Motorola proprietary junk.

[@robinsattahip2376]

So much for right to repair.

[@fisqual]

Since the ECU was unplugged from a power source you have to perform an idle relearn. The relearn is really simple: Turn off all accessories, start the car cold and let it warm all the way up in park. Once warm (over 180 degrees) put it in drive with the e-brake on and let it sit in drive for 10 minutes. It will automatically adjust the idle and be able to idle up properly for the AC and such. It won't do that before the relearn is completed. If any parameters are out of spec when doing the relearn it won't work. Specifically (and commonly) if the car can't reach operating temperature after an extended amount of time (from a stuck open thermostat) it will never perform the relearn. These old OBD1 Toyotas won't set a code for under temperature but it will still prevent it from doing a proper idle learn. This can really leave folks chasing their tails that aren't intimately familiar with these things...

[@lauram5905]

Do Gen 4 Camrys have a similar risk of leakage and those ECU issues? Hoping this isn’t something that’s waiting for me in the future

[@shango066]

No idle relearn on something this old

[@KameraShy]

In the Midwest, any car manufactured in 1994 has long turned into a pile of rust. The capacitors outlast the cars.

[@iroll]

Cars in the southwest: "Papa, what's a rust?"

[@fisqual]

Honestly, not these. There aren't any clean ones by any means, but these had superior rust protection compared to other cars of the time.

[@irtbmtind89]

In Ontario the only cars still left from that era are Corollas and Civics and even those are getting rare. All the GM product from before 2010 or so seems to have spontaneously dematerialized one day because it used to be everywhere and now most of the GM stuff you see is trucks. The only inspection here is for ownership transfers so you can drive a car until it turns to dust if you want.

[@siliconinsect]

I've had five of these 3rd-gen Camrys in wagon form. There's a similar ECM for a 5S-FE sitting on my living room floor waiting this treatment.

[@jiridrozd3289]

Hey, I love your videos, Im dealing with high idle on 1994 Mercedes W124 now, made a diagnostic tool (switch and led) I get error 10 which is ThrottlePositionSensor.. Will check it during weekend, but your video reminded me to chceck caps in controll units also. Keep on doing such videos...

[@38911bytefree]

To me this chip looks like it could be a signal amp or a servo amplifier (to control a small motor / actuator). This module is mostly run by a processor which is actually the most accurate timing piece in the whole board. I would rule out the timing cap idea, ... 100nF is really tempting, but as you said, it goes to one pin and just that ... suspcious .... Hats off to fight the obsolence. Not every driver is willing to change his / her car without a good reason or they are confortable with their ride. And this things are built like tanks.

[@Seiskid]

Wow you know cars as well, an not just a pretty face. Not everyone has a dyno lying around. Is this your day job? Car of this era were the highpoint in my opinion. High tech, well built, reliable. And yet easy to understand. We've taken a nosedive with car durability in the last ten years.

[@robinsattahip2376]

More complicated usually means less reliable.

[@martinda7446]

Right to Repair - Shango should be The Face of RTR! Edit: The Hidden Face of RTR!

[@KameraShy]

The Voice.

[@martinda7446]

@@KameraShy Of course silly me.

[@martinda7446]

@@KameraShy Or the blue glove.

[@arienhaddock8392]

Fishcaps is what I used to call them, they were common in televisions too. If you had a mitsubishi tv that was built between 1989-1995 you probably had about 50-100+ of these leaking caps depending on whether the set was direct view or projection. Dealing with the open traces on multi layer boards is never fun, the feedthroughs go open. These caps are 100% failure rate by leaking electrolyte, which always destroys components nearby like coils and resistors.

[@ivanjulian2532]

Does that mean the motherboard is then also a total write off, or can it be salvaged by someone with really good skills?

[@arienhaddock8392]

@@ivanjulian2532 Can be fixed by a skilled tech most of the time. Sometimes a board is too corroded to save.

[@PapiDoesIt]

My Caravan had similar issues, but fortunately it was repaired under warranty. I had 10 miles left on the original factory warranty!

[@dorothydale4683]

never saw anyone repair an auto ecu. good video. i liked it

[@n2n8sda]

Interesting video! If your replacement ECU works fine will you be replacing those electrolytics as a precaution / future proofing or just leave as it?

[@kareno8634]

That was Fun to know! My 1978 Datsun B210 GX had air leak in Carburetor ~ Created uncontrollable Cruise Control. lol When i first got my 1984 Scirocco in 1995, i asked about this cut Wire left hanging, near firewall. Not until 2 years later, Trouble keeping idle high enough after reconnecting AC, finally found it was for the Idle-Up Valve. 8 )

[@pantherplatform]

This is great. I have a 1990 Montero that's been sitting in the back yard since the computer fried back in 2006 when I was still an amateur. At least you can see what burned on yours. Tried a different computer but still no go. Even bought another Montero. It was my high school and college beater from 20 years ago and it's 4 wheel drive so it's not going anywhere.

[@derofromdown-under2832]

A good fix... Pity about the idle being a tad low. Good idea on getting another ECU... 10/10

[@Libertyordeath38]

You are very good at what you do, everything that you do. Love the videos! Thanks.

[@vancouverman4313]

I always use a light brush soaked with Methyl Hydrate to clean areas like this. It's easy on the board and dissolves most leakage from electrolytics. It isn't conductive and evaporates quickly.

[@defaultuserid1559]

I'd still be driving my 95 Corolla if a drunk driver hadn't totaled it. Even the factory interior light bulbs still worked. Toyota still makes great cars but they don't last like that generation did.

[@volvo09]

Those are nice reliable cars. The generation afterwards is reliable too. My mother actually has a 11 corolla and it's still a good car, nothing but oil changes, trans fluid changes. Still runs great at 180k miles. Only "problem" was a trans cooler line that rusted through (i simply eliminated it), and the exhaust manifold just started leaking at the head.

[@defaultuserid1559]

@@volvo09 The fuel and brake lines rusted out on mine because they were exposed to road salt but that car never ever left me stranded. Mine had 207K when it got rear-ended but it didn't burn oil and everything still worked.

[@fisqual]

@@volvo09 the generation after was explicitly terrible. The early 1ZZ corollas (98-02) have oil consumption problems. 03+ is fine though.

[@volvo09]

@@fisqual ah, didn't know that was am affected car with that issue... Had an 01 in the family and loved it. Same with a friend, they both wish they had that car still (but they took care of them). Ironically both have 11corollas now.

[@audubon5425]

Mother has a '99 1ZZFE - no oil consumption in 180k miles so far...

[@tiporari]

I get in analog circuits capacitance affects frequency or timing, but in these digital circuits I would be shocked if they used a passive component subject to value drift over time to set some critical timing. In ECU's 99% of them use CPU clock dividers for important timings. How much delay could you expect from such a small cap. With closed loop operation it wouldn't matter much as the ECU would adjust duty cycle. Maybe a stepper motor would get driven at a higher or lower frequency, but again, probably not going to hurt anything. Use a wiring diagram and trace the output pins to figure out what system that cap affected.

[@Mister_Brown]

the most likely case is the cap is an internal boost converter cap or on chip regulator for a derived voltage. people do definitely use caps for timing in ecus but never for critical things, still being off 2-3 orders of magnitude which is entirely possible with an 0805 chip capacitor might sufficiently break something

[@watershed44]

I have a 1994 Honda Accord with failing electrolytics too..I haven't started to work on it yet, however in my situation I believe the caps just dried out, and didn't leak. That makes it easier. It's also a known problem in Hondas of early 1990s -mid 1990s.

[@blitzroehre1807]

If AC pressure sense is low then idle boost solenoid does not get activated on some cars. Did the compressor kick in at all? Excellent troubleshooting!

[@richardweinberger2756]

You gotta love CARB. The guy that designed California's diesel program that outlawed older trucks got his degree from an online diploma mill. I believe he had a Vietnamese name like Tran, the info was easy to find on the web 15 years ago, I can't find it now.

[@cardboardboxification]

california doin everything it can to keep the rich , rich and the poor , poor

[@moviemania1137]

@@cardboardboxification Commies gonna commie. Just don't move to my red state, when you flee Ca.

[@mech-a-redneck9745]

Wow great vid showing your many and various skills. Huge respect for what you can do. Keep it coming.

[@One-Crazy-Cat]

Dictator governor will not approve of this. Only to be repaired by a licensed by the state at 100k cost and each repair fully “taxed” I mean approved by the air quality save the earth board. Haha. Just a joke guys don’t get any panties in a bunch. Knowledge is freedom man. Love the videos.

[@c0rpse1]

stop being scared of people who shove shit up their ass for pleasure

[@nathanlewis5682]

The big purge will involve going after people who has specialized skills and experience. The big wigs will use the skilled workers then eventually have them removed after they are no longer of use.

[@One-Crazy-Cat]

@@nathanlewis5682 I’d agree those ppl with diverse abilities (jack of all trades) are the ones that scare them most.

[@One-Crazy-Cat]

@@c0rpse1 just carrots as I understand it.

[@scratchdog2216]

I run a '98 Camry. I'll keep this in mind. Thanx.

[@RockeyDAproductions]

im slowly trying to get away from that crap on my truck. did EGR delete, did CAT delete, need to swap heads and intake so i can go carborated and swap to manul trans. that will eliminate everything the computer in my truck does and i can finally bone done with the BS it causes. like right now i need to adjust the fuel to air a little but i cant because no carb. i will make my truck as good as an old tractor over time.

[@stuntcardriver]

Isn't time for another plumbing video? I always enjoy those!

[@MrChris313]

Can you spray exterior with wd40 ,repel moisture?

[@sydneybiscuit]

yeah it that cap looked like it was a 0.1uf ceramic job. but awesome attempt, thanks for the content

[@matthiasmartin1975]

Could also be 4.7uF

[@RussellFlowers]

I once repaired a 91 Honda Accord module transmission control module by replacing a leaky capacitor.

[@andrewstewart8704]

Hi shango, Love the bonus car fix vids 😊

[@pglick123]

Can you use a solvent to remove the goo instead of scraping?

[@leegilbert9780]

101K... That thing is barely broken in.

[@volvo09]

Probable never even saw salt either... Thing will live forever if the owner doesn't neglect it.

[@nathanlewis5682]

Keep up maintenance and they will go 300k miles.

[@watershed44]

@shango066 Correct idle should increase a bit when AC is requested, pretty typical of Honda, Toyota, Mazda, Nissan of this era.

[@tedbell4416]

Had a 94 camry they were great cars

[@jetjazz05]

Was hoping to find a picture of the board online, maybe could see the number on top of that chip but I can't find that particular board in my snooping.

[@krz8888888]

Good cars to keep on the road

[@usernameg5]

i have a 2004 toyota corolla. i wonder if that could have bad capasitors? i have some electronic skills (very limited) i don't feel comfortable to take it open and check as long as it works

[@davidraezer5937]

Shango, those IAC valves on the Toyota cars are susceptible to getting hung up as well. Used to remove and clean fairly often. The dealer always wanted to replace them. Does LA county do the IM 240 still? We did when I worked in the Denver metro area. One of the strictest emission areas of the country. The Cat is definitely tired on the old Toyota but still doing something at least.

[@shango066]

it was new from the dealer

[@fanofoldfans9238]

While that ECM ECU is hanging out try disconnecting that cap and see what happens. If it's a timing cap for that chip clock or pulse width signal then something would be wonky. If it's a decoupler cap a different issue would probably be visible or not. A used ECM from ebay may not have the same micro code loaded (firmware). Ship it the way it is with the freeway guarantee. Guaranteed till they get to the freeway.

[@starquestman1544]

I just looked in the old ECU for my 94 tercel to see if it had a similar circuit to get a value for that capacitor but no luck, the ECU was made by Fujitsu Ten so it was totally different. If I remember correctly I think the one for the 97 5efe that I replaced it with was totally different as well. Ever since I did my engine conversion from the 94 3EE to the 97 5EFE my AC has never idled up properly, something to due with how Toyota used AC request signals I think

[@fisqual]

I had a 4A in my old Corolla that used to have a separate box that controlled the idle up for the AC. It had a little dial to adjust it.

[@starquestman1544]

@@fisqual I had to swap in the AC amplifier from a paseo from around the same year to get it to work at all since the tercel one was similar but lacking one of the control wires going to the ECU. Unfortunately they both lack any internal potentiometers to set the idle up speed like the older Toyota ac amplifiers did.

[@starquestman1544]

It works when driving but idles up and down when stopped and keeps short cycling the compressor

[@MrBIG4D]

Just rewire the solenoid for the AC idle kick. Cut the wires, ground one of them and connect the other to the positive of the AC clutch coil. Take the ECM out of the picture. I've done this on more than one occasion on imports. Common problem on some of these. Could be a wiring issue or internal to the ECM.

[@jeffscomp]

I had a 95 Camry and it ran great. They fly down the highway and are quiet.

[@Naudia93]

Lookout Scotty here comes shango

[@pradolover]

I have a 2000 Toyota Prado (5VZ-FE engine). Time to recap the ECU? Mine doesn't idle up for AC either but it does work.

[@channelsixtysix066]

Wouldn't hurt to check it.

[@KameraShy]

Did it ever idle up for AC? It that what it is supposed to to? Could there be a corroded connection or faulty valve?

[@pradolover]

@@KameraShy No, not in my ownership (2019-onwards). It does idle up to warm up at cold and idles fine with load (in drive with brake on). It also very slightly idles up for power steering demand. Should say it does have almost 390,000km (255,000mi)

[@MattExzy]

I wouldn't worry too much. Any idle problems could be anything beyond the ECU. MAP. MAF. Idle speed control motor. Slight vacuum leak. I drive an '05 Camry approaching similar miles, it always takes a few minutes driving to not 'chug' at idle in 'D' while stopped. AC also puts the rad fans to high, so that's an extra load as well for the alternator which might drag things a bit along with the compressor itself.

[@pradolover]

@@MattExzy No worries thanks mate this is a longitudinal engine with a hydraulic fan clutch so that would explain it. Cheers!

[@LestonDr]

You've just saved me a headach. We have a 1994 Camry with a cruise control that just started acting-up. Light comes on, then when you go to set the speed, the light flashes twice and shut off... for the day. I wonder if it is hinting for a bad cap? Will take your advise an look into it.... Thank you again.

[@LestonDr]

finely quit, the same capacitor 47uF 63v, no start. I have a parts list if you'd like it... thank you.

[@SolderBrothers]

Would to do me some more ECU repairs, very nice fix.

[@ivanchostefanovski2351]

J have toyota camry1992 2.2 Don't work D drive --- 2---' and L..On backup there is no brake lights there is no reverse lights ..On the dashboard where j put the transmition in D drive there is no light D drive on the dashboard rest od lights work (P R N Mised 2 L)When j put the transmition from P to R reverse the car kline and shake and motor start to work on 1300 to 1400 .In reverse ride great and powerful. Where is that ECU To check or the car have some other problem.Did j have to change neutral safety switch or ECU any advice

[@stephenpeterson7479]

I'm a bit envious you work with a dyno. I explored that when Sun first came out with them but the money was not there.

[@connorm955]

that's my favorite generation Camry. The sedan version is more common, only seen one that was a 2 door

[@donsurlylyte]

those years camrys are just great cars

[@waltschannel7465]

Love it! The only question I had at the end was if the ECUs are $24 and free shipping, wouldn't they likely also have issues? The car you were working on is 1994, but it only has 101,000 mi. according to the odo. Any other 1994 Camry is likely to have a lot more.

[@fisqual]

I buy a lot of used car parts and I do my best to find ebay auctions from the most suitable location for the parts. I buy alternators, power steering pumps, fenders from the south or west (TX or California). I buy AC compressors and electronic components from a cool dry climate (Oregon or Washington). And I buy interior parts from as far north as possible since they'll have the least sun / heat exposure. ...So an ECU from Washington would probably have at least a few more years before the caps leak.

[@erikj.2066]

Possibly, but presumably that cap spent its life baking in a hot car in So. Cal. If he gets an ECU from a more temperate part of the country, there may be less of a chance it’s caps have barfed all over the board. Even if the next one does have issues, it may become a blueprint, and parts donor to make one good working ECU.

[@robertp7209]

Is it possible the computer has to relearn the engine, since the power was disconnected? When it relearns, it figures proper idle speed. It takes so many hrs running at different speeds.

[@nathanlewis5682]

I thought you only needed a few minutes of idle run for the ecu to relearn it.

[@robertp7209]

@@nathanlewis5682 perhaps, can only relate to what a mechanic told me for my Mazda when he hooked up to the computer to do the state inspection, said there was no data in the system, I replied I just disconnected the battery to clean the terminals, (actually there was a check engine light up for a trans problem and I knew the car wouldn’t pass - that’s why). He said to drive it around different speeds for so long then bring it back. Thinking about it again, when I first restarted the car after reconnecting the battery, the engine idle was very low but it did come back up it did take a while though maybe it was minutes like 5 or so don’t recall.

[@jvst20051]

Shangoo66 hiw do i get hold of you i got a ecu that belive needs atention my car left mi stranded the other day.i put and extra ecu on and car fires up but with my old ecu it just turns on for 1second thn dies like its not firing the injectors can you repai it

[@jimw7ry]

So what was the result with the eBay replacement shango066 ?

[@pantherplatform]

I had to replace a couple surface mount bits on the board in the lighting control module in my 03 Grand Marquis which have been recalled for failing and loss of headlights. Not sure I used the right ones, the old ones blew off when I desoldered them. They've been working for three years already so must have done something right

[@Suddenlyits1960]

@GrandsonofKong, Agreed! In any rational state a 28 year old vehicle WOULD be smog exempt.but the bi-annual smog checks and penalties are another big cash grab for the state. Originally there was rolling exemption in which any vehicle that was 30 years old automatically became smog exempt, but the governator signed A.B. 2683 into law ending the rolling exemption,and requiring 1976 and later vehicles to require smog testing for life. Why people havent lobbied since to change this is beyond me,especially since many 1980's cars are considered "classics" now. Imagine having to take a 1976 vehicle in every other year and pray it will pass just so you can get your tags renewed. its all part of our brave new world. "Ending is better than mending" We should all be in perpetual debt driving brand new,state approved,electric cars.

[@lukestone1699]

I just repaired a Toyota ECU. 4 caps had leaked everywhere and had to replace 10 traces. 2 chip caps but they had markings.

[@dann2ptf]

Surface mount monolythic cap next to the jissing electrolytic...My company I worked for used to make them by the ton, except we laser marked the actual value in pf on them

[@CATech1138]

is the ECU getting a compressor on signal?

[@zaprodk]

Put a scope on the mystery cap and see if it's a waveworm (timing) or a DC-voltage. If DC it's for decoupling an internal voltage reference.

[@andymouse]

Did you find out the value of the cap ?...cheers.

[@andic6676]

Can you use something to neutralise that corrosion?

[@ecaparts]

Where’s the flyback and horizontal output tube??

[@nathanlewis5682]

Don't forget the decades of Southern Californian dust, dead insects, rodent piss, and cigarette smoke.

[@zakklee2556]

In a tube television.

[@carslover3509]

Great vid I don't know you have expement with cars

[@tylerdejohn4414]

Do you really need to smog test a 94 in 21? Here in north carolina cars are exempt after 20 years!

[@joshjones3227]

That chip is in the same package as motor driver IC's you see in 90's era Japanese electronics that always fail. The cap is probably just a bypass for some internal reference voltage.

[@MrChris313]

Recapping icu?

[@TurboTel68]

Looked like the lambda was fairly happy. Do these have the immobiliser info in them like the modern ones? Most of the ecu’s we see are water ingress related to being located in the engine bay but the latest ones are triple layer pcb so repairing them is pretty hopeless, we just try and find a better donor one and clone it now

[@shango066]

Naw 94 is super basic. I look at the new late teens on up and they look like they're designed to last about 10 years. Either the manufacturers don't want the cars to last more than 10 years or they know that the majority of humans aren't going to be around in 10 years or gasoline will be gone in 10 years something like that

[@oledcrt]

@@shango066 I bet in 10 years we'll still have gasoline, but we'll have legislated natural gas and electricity shortages. We'll all be running our homes on gasoline generators and people with electric cars will be screwed.

[@billmyke746]

Many will be gone in 10 years, unfortunately.

[@TurboTel68]

@@shango066ah OK, bit like the early stuff we started seeing in the mid 90's here in the UK, super easy to bypass the immo back then, the more advanced stuff seem to come in with canbus. I'm with you on that one, I think it's the same all round with this 10 year EOL, cars, appliances even houses to an extent. We are at a stage here that we don't even repair engines on a lot of cars now, certainly on Ford with the small EcoBoost power unit, just buy another crate engine for less than a rebuild, not sure if it's the same practice in the US? Thanks for keeping it real, always enjoy your perspective on things in the commentary

[@melplishka5978]

It’s a common fault that the idle up grnd from pcm driver usually burns out. Take the ground from the ac compressor side.

[@johndonaldson3619]

I drive a '93 Toyota Celica (20 years now) with one of these under my seat!!

[@jcsandberg2]

Can’t you just manually adjust the idle up?

[@rogertyler3237]

Yah Like You Said That Cap Leaked Shorting The Tracers Together You'r Better Off To Get A New one Instead Of Trying To Fix The Old one.

[@rogertyler3237]

The Way That Capacitor Leaked & Shorted The Tracers Together It Might'ive Damaged All The Circuits.

[@acefeeley9007]

Does anyone know if he mentioned how many miles are on the Camry? If he did, I missed it. Just curious as I have one.

[@christopher88719]

I am seeing more and more ECUs failing in 90's cars. If someone were to create an exact clone of the ECU using all new parts would that require a C.A.R.B. E.O. to be legal and pass smog in CA?

[@shango066]

It's okay, Vehicles aren't designed to and shouldn't last forever. Transportation needs to evolve with Society.

[@christopher88719]

I sure hope CA can hurry up and make these good running paid off cars obsolete so people can rush out and buy a brand new Nissan and have the CVT fail. LoL!

[@zakklee2556]

@@shango066 1990 toyota 3.0 L V6 , no engine check light when ignition key is set to on position. ECU communication problem?