CADILLAC CTS KEY STUCK IN IGNITION NO COMM DIAGNOSIS & FIX

[@alexanderorozco661]

I am a mobile tech and you are what a tech should be all about. 🥋

[@roxanneabbott8424]

Eric I always enjoy learning from you, if that shop doubts you they just dont know what a blessing they have in their midst!

[@gregmccarter3243]

Damm right on that....

[@ljviper8460]

Eric is a diagnosis master! Diagnose Dan is pretty too, but Eric is the best...

[@CrazyPetez]

I don’t work on cars or motorcycles at all anymore I’m too old and I’m old school. I’m mightily impressed with the way you tenaciously track down a problem. Just like when I worked in telecom data communications. All about checking the wiring, and the components. Well done Eric👍.

[@siucbset]

2+3=5: Sometimes when you know your stuff, because of certain situation you begin to doubt yourself. 1+1=2&1+2=3&2+3=5. It gets tricky when you have a situation where you have 2.4+3.4=5or6. Sometimes your laws are known but sometimes you have an unknown. I am glad you were sure of yourself. A situation like that would make a lot of people doubt self. I am so glad you did not let the dealer throw you for a loop.

[@CharlesMartin-q5j]

Good work on the cat. My name is Charlie. I run. Keep it simple mobile auto solutions in San Antonio. Texas, I have the same exact car with the same exact problems. They already put A new PCM Thanks for awesome info may GOD BLESS You and yours

[@erniecarrasco9107]

My friend gave me his 2003 CTS 3.2 L 5 speed manual transmission because he hated it. The guy that traded it to him, when my friend got into some police evading trouble and needed to off his own ride and which was a car that he had just paid 10,000 dollars for, had a body shop so he had my Cadillac looking nice but didn't know beans about mechanics so he hated it too since it had the limp mode problem. They thought it needed a new tranny. Lol. All I did was this procedure and the procedure where you wait 20 seconds wait and turn off and on the ignition without starting the ignition 3 times and boom! I have a bad ass sports luxury sedan! It has 150,000 miles on it. I'm never gonna stop driving it! It just needed the relearn procedure to the accelerator pedal positon sensor. The check engine light code P2138.

[@cyberslacker5150]

These CTS computers go bad all the time. I've changed around a hundred. They're so small and weak. Plus they are bolted right on the hot motor. I don't know why GM engineered these cars this way except to make people like you and me money. They're putting my kids thru college. All faulty CTS ECM's make the key get stuck. Also. If they were Class 2 error codes, I would have started scoping out the Class 2 data line first. Especially at the start of the engine. However, when I saw "key-stuck-in-the-ignition" problem I knew it was the ECM. Now this is an educational video. In that regard, I love how you took your time to explain to everyone in detail. That makes for a great learning video.

[@tecnaman9097]

Top diag Eric.Never had alot of faith in reman ecm's. If any module arrived in a box that had been opened or had greasy finger marks on the box (done the rounds in the workshop) it went straight back to the dealer. Some can't be trusted to do the right thing.

[@BrentConnorIsBestConnor]

Dude you're a wizard. Also you're doing a great job making this super complicated stuff really understandable.

[@budimanjaya3614]

This is a hot shot car mechanic supposed to do on difficult kind of troubleshoot ! Trouble not only in vehicle but also on supplied ECM, means both internal and externally, Double thumb up for you Eric ! Good job man !

[@mcgama88]

Just at the moment I have a Cadillac with a customer no start. Several issues to sort out. But likely not computer at can-bus or single wire. I found your troubleshooting excellent and I learned from lessons included in post. Thank you for the instruction and the "heads up" as part delivery with prior install to electrical part. I find my customers love their GM features and patient repair with test and confirm...competence has them returning...as individual and then as gathering their friends. I find that listening to my customers as what they expect...and delivering that expectation is when....they are 100% satisfied. I find when I can briefly explain in simple terms...what the problem might be works well.....and further, coach those people to good maint schedule. They like the comfort and general reliable Gm models. M

[@stealthg35infiniti94]

Great Diagnosis! Short your long wires together, press zero on your meter if you have that feature or remember the residual resistance...Most electronic resistors are +/- 10% or more, so if it read about 110 to 130 ,I wouldn't sweat it, and on top of that test equipment also has tolerances that give a slight error...You're a good technician proving 3 bad ECMs...If anything, that shop now knows you are the "Tech to Call" when problems need to be solved!

[@Cheepchipsable]

A lot of people don't understand there is a margin of error in instruments, though for an expensive scan tool 10% seems a bit much.

[@stealthg35infiniti94]

Most digital test equipment is very small less than 0.1 % plus/minus one least significant digit. The load resistors the car module on the other hand is probably 10%, maybe if critical 5%...

[@fredsalter1915]

Wow! 3 bad replacement PCMs in a row, plus the original bad one! Now that's some bad luck! Another outstanding video.

[@josecruz4792]

Great job Cadillac most of the times come to my shop with bad ecm diffrent issue you’re the man buddy

[@themuzzer55]

Didn't understand much about the whole video other then you are good at what you do and seem to care about what you do, if you continue to do that and charge a fair price you will be very successful in life.

[@CKBrutus]

Had this exact same problem with my Mom & Dad 05 Cadillac SRX 3.6L. He ended up going with a remanufactured ECM from Flagship One. The first one was bad but the second was good. There is a small hole on the bottom of the steering column on the right side where a small screw driver can be put in there to release the key. This is a classic GM problem. Great video.

[@stevelake3297]

Please show this video to your Shop Manager. I've been down this road, it pays to show your leadership to your managers. Nice Job.

[@boomalaki23ii45]

Awesome video. I really like the in-depth explanations with the wiring diagrams. They can be so confusing sometimes so it’s really helpful to have you walk us through them.

[@danieljeffery1136]

Yes

[@kevinogorman6282]

Great video and explanation of isolating the issue. You know your stuff. Patience and logic. Thanks for taking the time to go through your steps.

[@badboytommy187]

Just not your day ! I know how you feel , but you’re still the best mechanic , also honestly to the customer and very good review on the video footage. 👍

[@chekelley6861]

The CAN lines on GM are continuous thru the modules just like a traditional CAN network. They just go in on one set of pins and out on another, but interior to the module they are a direct connection if you check them with an ohm meter. CAN + in and CAN + out. Likewise on the negative. The weird ohm reading on the CAN network may have been because the CAN was powered up when you checked it.

[@masterjoe3000]

Excellent work bro it has to suck to keep coming back knowing its not your fault and having the feeling the shop dont believe you... Thanks for filming ur hard work!

[@faustogonzalez8397]

Eric absolutely outstanding video, one of the best as far as learning Can Bus basics and troubleshooting techniques. Love your patience and the fact you never doubted yourself ! Once again absolutely Great Work !!!

[@cindygagnon6405]

who are you? you are genius! I'm just starting to have problems with the key being stuck cause of AntiTheft after AAA installed a new battery - they did not follow the process of "home" on the battery. I was told I'd have to have the entire system re-programmed!

[@mandah2253]

What's the home thing & what was the fix?

[@HouseCallAutoRepair]

Run over by the bus! Wow! So glad you made it through that mess unscathed.

[@dougbursh9408]

You’re a beast!!!! You’re trouble shooting skills are off the charts!!

[@NorthFraserFab]

Great video. I'm looking at buying one of these that is a smoking deal because it has some similar problems to this one, this video gives me all the knowledge I need to actually fix it without just throwing money at it

[@fp8007]

Car is runing ac works customer is happy ! 🤓 👍

[@isaacdelgado7811]

very good video thanks I just had a problem like Cadillac cts 2007 the owner bought a used pcm the car started but not ruun I told him to buy a new one but don't believe it in my diagnosis. Clase 2 Is the most common problems on this cadis.... thanks again

[@davaspec]

Great video. Probably the sneaky dealership was trying to offload old stock thinking it was still good. Glad its all fixed. Good job.

[@JoseFernandez-zt5xs]

I thought I knew automotive electrical but when I listen to you I realize that I don't know much.

[@stagemanfx]

Great diagnosis it’s always tough to say it needs a pcm but you did your due diligence and it worked with confidence of your experience

[@davidgoliath982]

forgot to tell u that u did a great job. not many people would have ended up with a successful repair.

[@adrianking5736]

Excellent case study and diagnosis. I like it. Great job.

[@IamKurr]

Awesome diagnostic procedure man. Makes me feel better about checking and double checking everything before calling any computer. Thanks for the info

[@neverstoplearning382]

I think that happens only to the best on the industry. You are one of the best, always giving really good food for the brain. Great diagnostic process and always trusting your work. Excellent pal. Best regards.

[@QBallRacing]

you are right on track. a technitian today have to be careful when measuring can data in the dlc port... there are many cars today that it is not possible because the can wires in the dlc goes thru a "gateway".... in this case the transmission ecu has the gateway built in.

[@popovlist]

Unbelievable this issue extended too. Outstanding work !

[@jonathanshoop8554]

Great breakdown...was figuring it was my ecm. Hoped it was just a short in a lin the DIM. BUT I think when I drove it enough after I reset the ECM with the fuse pull. It stopped but came back only after 20 minutes of it going away.

[@powayimports4175]

Omg what a nightmare. Have been in similar dilemmas before. I feel your pain man. Good job sticking to it to the end.

[@badboytommy187]

Good call for the TCM 👍 . But I want to know how much you charge the shop for you dynastic coming four days for the same vehicle ?

[@zeepopular]

Great video! My ECM is failing in this same car (2.8L though) and having the same issues. Do you know where the 4th ECM (the working one) came from? I haven't ordered one because I've heard nightmare stories about what you experienced (3 bad ones) and they couldn't return them.

[@charlieleyko6355]

Great video ,well done . I had this exact vehicle same issue ,I traced it too pcm . Me and the shop that had me trace it out did not have a way at the time to program ecu no j box ,had too ship it too dealer . Yeah being a tech for a long time when you get repeat parts with issues yeah it sucks when it looks like your throughing parts at it and not knowing what your doing I’ve been there with factory parts that are junk. You obviously know what your doing and they called you keep up the great content !

[@FalconsGarage]

watched the entire video .. very informational .. ben having same issue on this car with an 06 cts .. we replaced the ECm on the shop and still same issue .. this one is driving me nuts! lol

[@Joeelectronicschematicsforauto]

You really know your electronics very well especially from wiring it is a a treat to see your videos

[@jameslyons6196]

Yep classic! I have the same exact problem with my 06' and all say ECM, others blew a lot of money before they strike the answer. thanks for the truth in the video.

[@Easy_Victor]

Where is your shop?? I need you to diagnose my V! When I turn the ignition from run to the off position, the headlamp washer nozzles pop out and spray water. Kind of annoying when I don't want things to get wet in my garage. Also, every now and then when I go to start the car it just clicks with no starter crank with a perfectly charged battery. Plus, starting to have the issue of not getting the key out/unlocked.

[@chadgardee1496]

Your diagnostic skills one of the best

[@ME-kv8ew]

You did an awesome job! That was not an easy thing to find. Great job.

[@yiannakosautomotivekeys2380]

Another great video. It would be nice to do a video on how you program the ECU Eric. Thanks for sharing your high skill knowledge. I cannot get enough out of your videos. I am hooked on them. It's like a disease!!!

[@TractorTech]

I am working on an 06 CTS 2.8. I have a no crank, key stuck in ignition, no communication with the ECM, and a U1000 in all the other modules. I have checked my powers and grounds at the ECM. On the class 2 serial data, at the ECM connector I have less than a volt. Do I most likely have a wiring issue? There is supposed to be a splice for the class 2 data 7" from the TCM, but I don't see it.

[@Mrkevi123]

I have this same exact issue

[@kaetyflag8337]

My boyfriend sent me this video, our cadi has literally every problem as the one in the video. We’re trying to get most of it done ourselves to save money and I think this video will be a HUGE help to us! I honestly wish you were in ny cause I wouldn’t have a problem that you wouldn’t get our car back to brand new. We have a code reader at home we can use for codes, obviously being in different states will codes be different to the codes you got on there? Stupid question I’m a girl and just learning 🤣

[@droneservices8993]

Eric, what is the name of that software program you are using to trace the data lines? Thanks

[@RR-bt5xv]

great diagnosis. I would have probably given up

[@timricketts.]

Did the fix stay or come back after a while? I have very similar problem with shift problem also. I knew it's electrical. It's like the car is not in park position.

[@whuzup3]

Hey is there a way I can contact you for an electrical issue with a Cadillac srx?

[@abrahamgarza4272]

I suspect the resistance reading was off due to the circuit being energized. You should de-energize the circuit to get a resistance reading. If the circuit is enegized, you can compare the voltages on high and low. If the voltages are not balanced, it's an indication of a possible short, open, etc.

[@gregjones8501]

These cars are garbage and can be difficult to diagnose but as always you nailed it bro!

[@Joeelectronicschematicsforauto]

It's refreshing to see an automotive technician use a diagram for analysis before he does anything

[@airborne8580]

I TRY TO INFORM PEOPLE OF A UNKNOWN SITUATION THAT PEOPLE ARE TOO NAIVE TO TELL YOU ABOUT IF YOU DON'T HAVE ANY PATIENCE PLEASE DO NOT BUY A USED CADILLAC AT ALL THE ELECTRONIC TECHNOLOGY SYSTEM IS A CAR OWNERS NIGHTMARE

[@aleksandarzoric9419]

„They was looking at you like you didn’t know what you was talking about“ . Well, you showed you do know what you talked about. Only problem is that they will (probably) never understand what you talked about.

[@Cheepchipsable]

Really, what's to understand? Perfectly natural they would have doubts after so many fails. You would be a fool not to. The only question in my mind is how trustworthy could a reman automotive computer ever be? They should be asking the shops that supplied the faulty parts for compensation, not the owner of the car.

[@aleksandarzoric9419]

Cheepchipsable I have to say that you right. I was just get mad about how many all kinds of no - experts use cars just as a platform to make money without any kind of care for anything. Thank to them one expert comes out like a fool that don’t know what he’s doing. It’s definitely hard to believe there’s that much of them with same mind set doing same thing.

[@sheeshalready]

Brother, I cannot imagine how stressful each time you knew it had to be the new computer, and you had to tell the shop. Off camera, you did what we all would have done, gone over and over the diagnosis because now, if you are wrong, you look unreliable, unprofessional, not the expert they are paying for. Good job...wow!

[@noeygarza64]

Wow! What a headache! Glad you got it going!

[@rafaeltorovip]

Hopefully you get an apology from the manager. Nice video. 👍

[@gilron9585]

great video! I learn a lot about car electronics :) what a nightmare with all the defective computers :)

[@mohammadzaid9799]

I always liked your video before watching it.

[@johnturner8829]

Great diag and video. Thanks for sharing. Can't believe the hassle to get a proper working part, just stupid. Always good to see you man.

[@ADVANCEDLEVELAUTO]

Thank You!

[@okaygee4132]

@@ADVANCEDLEVELAUTO Have the same issue with a 2007 CTS and the shop says it needs an ignition immobilizer module. Would you suggest replacing the ECM first and seeing if that's the real issue? The shop already replaced the ignition and battery.

[@sandyande]

What a nightmare! Well done Eric cheers sandy

[@FirstNameLastName-ev3jk]

Well done for your tenacity, Eric.

[@OzMechanics]

Hey I just worked on something exactly like that 🧐

[@Eremon1]

Great technical diagnosis. That would have tripped up many techs. Most especially once you get a replacement part that is garbage. The ECM mounted to the top of the engine just seems GM wants that car to break down. What a bad design.

[@mustaphamastouri7748]

u r such pation man. i love what you r doing. i m learning lot from you. belive it or not. the messenger is familly. thanks lot. just stay on. you information for some are priceless.

[@saahidjami3674]

Great job explaining everything, well done 🎉

[@chrsrans1]

Great video, I think that many people may have given up on this one, must have been very frustrating for you.. I enjoy all of your videos by the way , kind regards, Chris. U.K.

[@lupedelacruz4152]

You're the man amigo good job and thank you for sharing

[@LessThanHandy]

Persistence has its rewards. Great job on the Caddy.✌️

[@SalmanKhan-no4oz]

Love from Pakistan, You doing really great job. I watch all your videos 👌

[@jgeorges3061]

ERIC, AWESOME and always enjoyable to watch and see how ur thought process fixed this care thanks for sharing.cheeeeeeers

[@sinegra30]

I Have not seen the entire video yet but U1000 codes are always related to a Bad ECM/PCM or a ECM/PCM power feed wire... Thanks for sharing!

[@karelmunnikde6822]

Nice vid! You got skills! Maybe i'm mistaking but i once had a car, and i meassured the 60 ohm resistance for diag puspose, but also extreme high res. My mistake was that i meassured when there still was communication on tje bus. After let it fall to sleep.... resistance check was posible from obd. Love your vids, greets from the Netherlands

[@kanjorsx4969]

It’s wins like this that always bring customers back especially when they doubt you hardcore in the beginning and in the end you end up being correct awesome vid man keep the good work going!

[@benjaminruiz6931]

Like always great Job with good details , Just one question ? was the problem the Termination resistor set 114 ohms

[@LisaBeasley-zy2dr]

Loved your video & learned many things. Just trying to make sure I’m understanding the exact part you replaced because of the many different references to try you & others. You replaced the “Engine Control Module” is that Correct

[@rogerrivera4012]

Hi Erick! Great video. What kind of scanner are you using in this video? Looks like an Autel, If so what model is it. I enjoy watching your videos man.

[@beantowngelo]

my dad is also a mechanic and he speaks very highly of you, very knowledgeable man you are !

[@ADVANCEDLEVELAUTO]

Thank you

[@booogil]

just watching this video is tiring , how about you the one who is doing it....superrrrr great video

[@bossmanfox3507]

Great video. Nice explanation of the problems and the steps to the solution. But it would have been great to see how the programming is done

[@carlbrandon8040]

needs ECM.. boom ...under 1 minute into video....look forward to watching more of your videos. i like how you worked out where the terminating resistors were. deductive reasoning...they are doing something inside the pcm to share info and there is names to those electronic gizmos. i learned a little about gates the other day.there is also a little guy in there that says "it will be funny if i don't let them have the key"

[@marcuscheko2226]

have a basic knowledge of electronics , i understood everything in detail as to the way you followed the scamatic , good job , ....but where did you find the scamatice for your troubled car ? been searching for one myself , its for 2000 pontiac firebird 3.8 v-6 ....thank you

[@chrismechanic2000]

great vid and brilliant detective skills there, shame about the dodgy ecm's making you look bad/second guessing yourself.

[@williebutts7061]

Greetings Eric, do you have a shop you know of in the Orlando fla area that can do the same things you just did in this video. The dealer here won't tell you that they have no clue as to the problem. Twice they changed out the EMC and the Traction Control module (both Used) and still the same results. charged me several hours work, and for the modules, but didn't fix the problem

[@austenj4539]

Massive list of fault codes would guide me to a computer/module component problem. What kind of heat shield material could you install to protect an engine mounted computer? I watched 'DiagnoseDan' deal with a Mercedes computer on the engine that failed to allow the crank when the engine got hot.

[@angusalamezie6193]

The genius that I know

[@williamferebee4141]

How do you find the turn signal module on that their 2012 Cadillac CTS

[@samrugtiv3839]

Well done my friend,Don't let them shit on you charge him good. Sam

[@Cheepchipsable]

So you wouldn't doubt a diagnosis with 4 failures in a row? They should be asking the shops that supplied the faulty parts for compensation, not the owner of the car. Just bad luck all round.

[@jimferguson7503]

"Unbelievable." Three dud ECMs and finally one that worked. The suppliers need to be charged for the additional labour costs!!

[@ADVANCEDLEVELAUTO]

It was very frustrating. Thanks for watching!

[@veronicagray3486]

QUESTION IF YOU REPLACE A BAD ALTERNATOR ON 2007 CTS 2.8 DO YOU ALSO NEED TO REPLACE THE ECM COMPUTER

[@happylittlemountains3724]

Wish i had you looking at my caddy

[@magogon70]

Awesome work, thanks for explaining all the stuff with the 4 computers. Its almost incredible.