Dodge Ram 1500 PCM problems No BUS FIXED! No Communication PCM/ECM replacement. Problem solved! PT 1
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- Опубліковано 30 чер 2024
- Dodge Ram 1500 PCM problems No BUS FIXED! No Communication PCM/ECM replacement. Problem solved! PT 1
Do you have Dodge Ram 1500 PCM problems? This video will solve your Dodge Ram 1500 PCM problems/No BUS/No communication issues!
Welcome to Cody’s Auto Diagnostics and Programming on UA-cam!
This is Part 1 of our Dodge Ram Truck with computer/PCM/ECM problems with no communication diagnostic video.
Today we look at this Dodge Ram Truck, it was brought in and upon initial diagnostics I saw “No BUS” on the dash display, which lead me to believe that there was no communication with the computer/PCM/ECM .
I tested this no communication issue on this Dodge Ram Trucks computer/PCM/ECM , completing a power and ground test.
I verified PCI BUS signal to the computer/PCM/ECM , and this Dodge Ram Truck will be needing a computer/PCM/ECM , and to be VIN programmed.
TechAuthority isn’t needed for this process, and computer/PCM/ECM programming can be handled with a scan tool.
This diagnostic process works with many vehicles, such as no bus Dodge Durango, and even for no bus on Dodge Dakota and can help test a PCM failure.
Equipment used today while making this video:
Drew Technologies CarDAQ-Plus 3 All Makes J2534 Reprogramming Tool - J2534 amzn.to/3ESxBoJ
Snap On Tools Zeus Diagnostic Scan Tool - shop.snapon.com/product/ZEUS-...
Information-System/ZEUS-Intelligent-Diagnostics-and-Information-System/EEMS342W
Snap On Tools Digital Multimeter - shop.snapon.com/product/Autom...
AESWave uScope Master Kit- www.aeswave.com/uScope-Master...
AESWave uTest Advanced Terminal Test Kit - www.aeswave.com/uTest-Advance...
Mopar TechAuthority - www.techauthority.com/
✅If the video was helpful, remember to give it a "thumbs up" and consider subscribing.✅
Who is Cody’s Auto Diagnostics & Programming LLC?
I was an automotive technician for the last 17 years and hold ASE master with A9 light duty diesel, L1 advanced drivability, and L3 hybrid certifications. I just recently took my skills and tools on the road. I am now a mobile diagnostic technician, and go to automotive repair shops to perform programming and diagnostics.
This channel is anything automotive related with tool giveaways to insight on drivability, diagnostics or programming.
Please feel free to contact me with any questions, comments, or concerns and I'll do my best to get back to you.
For Questions/comments please feel free to contact me at CodysAutoDiagnostics@gmail.com
To help support the channel www.paypal.me/codyautodiagnos...
Be sure to check out the playlists for more tool reviews and diagnostics:
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Tools reviews:
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Diagnostics:
• Diagnostics
Shop Life:
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Equipment I use, and recommend:
GoPro Hero10 - amzn.to/3O6TN2J
DJI OM 5 Smartphone Gimbal Stabilizer - amzn.to/3JDnVix
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⚠ Disclaimer⚠
Cody’s Auto Diagnostics & Programming LLC is not responsible for property damage or injury incurred because of any of the information contained in this video. Information given in this video does not guarantee the desired outcome. Any injury, damage or loss that may result from improper use of the tools, equipment, or the information contained in this video is the sole responsibility of the user and not Cody’s Auto Diagnostics & Programming LLC. This video made for entertainment purposes. - Авто та транспорт
This is my exact problem on my 02 durango. This video saved me. I was chasing diagrams, and ground wires. Now, I know where to look. Thanks for the video!
Happy the video could help!
Nicely done, struggle is real trying to film this stuff, there is so much to fight with without a camera to worry about, but it's nice to see I'm not the only one...lol.
I like your setup there, really sucks when they cram us into bays with tire racks next to our work space for sure.
Great video, keep it coming!
PAULY'S AUTO thanks man. Every since we started doing tires we have absolutely no room in the shop lol. After doing some videos it definitely makes you appreciate the other guys putting these videos out for the rest of that much more. This one isn’t even edited which definitely even adds more time to put these out. Hats off the everyone that takes time to help other people, including yourself!
@@codysautodiagnosticsprogra8706 It really kind of sucks these days, not too many younger guys or gals choosing this as a professional career...so it seems, which is why I wonder if maybe the UA-cam world will be able to encourage younger generations to see how great it can really be to do this for a living! When we were slinging tires and changing oil times were different, now every one expects to be top scale straight out the gate! It took me years to get to where I am at, lots and lots of studying, 7 day work weeks, and low paying job for hard work day in and day out! There really are a lot of us who want to help teach and mentor the apprentice types because it makes our time and effort throughout our careers worthwhile. Plus we learn from it and learn from our experiences with those who are just starting out! We need tech's badly, there is a huge labor shortage.
You nailed it. Your experience and working 7 days sounds just like my situation. Took lots of hard work, dedication, and wanting to learn to get to where I’m at. I love this profession and we are definitely in a tech shortage especially with the vast Changes in the automotive industry. It’s not like the “good old days” lol.
@@codysautodiagnosticsprogra8706 truth, it'll be interesting to see what happens in the next 5-7 years, I'm optimistic about it, we are in high demand right now, automobiles are so complex that hell, even the manufacturers are having trouble finding answers for what they created!
Great video, again Cody!
Voltage Drop Diagnostics thanks walker 😂😂 jk bro👌
Great video Cody!
zack mcclain thanks brotha!
Hey Cody I gotta give credit where it's due definitely the best video I've seen on this issue and of course exact same vehicle and problem I'm having as well Im no mechanic but trying to learn I don't have a u scope can I check the PCI bus communication line with a test light or voltmeter if so how I'd really appreciate any help my wife's durango has been sitting dead now for over a year and she really loved that thing need to get it fixed ASAP
By the way had the motor replace and the mechanic saw the O2 sensor wires was burnt at the connector onto the wire harness and never told me till after I was told by the muffler shop that they was damaged so that might have shorted out unit took it back they rewired it but I don't think it's wired right burned out the first board then I replace it what the second board so I think the problem is it's not wired correctly and causing major problems told the mechanic shop to replace those wires or check their work I think that's why it's not running now. $700 wasted but they will get it back and fix it or give me back my money and I will go to the dealership. we need more guys like you.
Ah... I think I need more coffee to keep up with the jitters.! 😂😂😂
That pcm reminds me of my wife..
No comm.! Hahaha
Haha yeah my hand definitely wasn’t steady this morning 🤣
Nice diag Cody!
Flat Rate Master thank you Mike!
Thanks to Cody's Chanel I now have Plethera of banana jack leads. And clamps and everything works together.
That’s awesome! Bananas for the win 🤘
Great tech information! Thank you! I have an ‘02 with the same issue. Although it will start back up. Sometimes right away and sometimes after it sits. The usual run time is now 20-25 minutes. I’ll start to diagnose mine as you did.
Keep me posted buddy.
I'm having the same issue. Got a refurbished PCM vin loaded. Ran great for about 2 weeks but came back with a vengeance. Back 2 square one now. It'll stay running for about 20 to 30 mins on a warm day and if I'm Lucky maybe 45 to an HR on a cooler day. Could this be a faulty PCM as well?
I ended up having a bad pcm. Ordered a refurbished pcm and it’s been running great since.
ive got a 99 ram 318 with the same issue, it runs beautifully for 20ish minutes then just shuts off without warning and tosses the no bus code. sometimes it comes back after 10 minutes, sometimes it wont start for a couple hours.
i already replaced my fuel pump, crank sensor and a few small things, i was praying its not the PCM but the list is almost gone now
@@LoneWolf-kw3ol did it end up being the PCM?
Nicely done sir! Glad you checked that 5vref
Haha yeah only takes one time getting burned to check all possibilities
Cody’s Auto diagnostics you could say that again
What if there is no 5volt ref?
Very good next time use a tripod but great job straight to the point the best video i have seen so far on this thanks for posting
Thank you!
good job. thanks for the video
nice and easy done least exspensive tools too
wesley pagel Absolutely it’s not always about the price
I would’ve grounded the ads relay circuit and make it start to confirm it was the pcm but since a lot of times we know what’s up with those pcms might just shorten time haha nice vid
Hey Cody. Do you think it was safer to use an LED test light when checking powers and grounds at the PCM?
For powers and grounds I use an Incandescent light to “load” the powers abs ground. Led doesn’t draw enough amps to show if the powers and grounds are actually ok. Being the module supply or main grounds an incandescent light won’t harm anything.
Well done. This is how check out and repair should be done!
Dustin Atwood thank you bud, much appreciated!
Having this issue with my 15 durango. Whats the price range on getting this fixed. It caused the engine coolant sensor to go out. (Easy fix)
Cody just catching up on your videos. Do Honda’s come preprogrammed. I have a 99 3.0 and 07 3.5. Just wondering. Anyway good video. Thanks for sharing 👍
Arthur Fricchione hey Artie! Honda’s typically will come programmed. Will usually have to write vin and security depending on the year
Cody thanks for sharing that info. Enjoying your channel. Very informative and easy to follow. Thanks for sharing
I've got a 2015 Ram 1500 Sport I bought brand new in 2015. It's been a great truck! But, now I'm having some issues with it. This truck has a push start. Both keys has brand new batteries and the truck has a brand new battery. Sometimes when I go to the truck to get in it, my truck won't unlock. I use the pop out key to get in the truck and it won't start. The cluster panel is on and I'm not getting any messages saying "key not found" I took it to RAM and they said nothings wrong with it. But, it's happing two - three times a month. What do you suggest? 168,000 miles
98 dodge durango 5.2, i get power to pin 22 but no power to pin 2 . my 2 grounds to pcm are good (pin 31 & 32. on mine it says pin2 is Fused Ignition switch output. So, should i still be getting power to that?
Great job my friend
hassan issa thank you and thanks for watching!
Very useful information
Thank you for the effort and sharing your knowledge 😀
Your welcome. I’ll try and get more videos out soon
Had the same problem on a 2004 Dodge Durango 4.7 change it out still would not start. Sent it to a shop they said it was the fuel pump , got it back with the check engine light still on idling high next day took it and had check engine light check, o2 sensor bank 2 upstream and transmission malfunction code. Now it want start.
Dont forget to check the fuse in junk box, if u will not have the power in the green wire 12+
I have an 02 Ram 1500, 5.9L gas with a crank, but no start issue. No communication with PCM, Security light on dash stays on steady. Mismatched vin is the only thing on the display.I'll check voltages and grounds tomorrow. I watched your video and you quickly were able to conclude the pcm was faulty. Nicely done and east to follow along. I was wondering if you verified off screen that the computer plugs male and female pins were all making good connections as I didn't see you do that in the video? It's been my experience that the female pins sometimes get checked with the standard DVOM probes by pushing the probe in and opens up the socket a tiny bit. When the male pin plug gets installed, there may now be a loose or intermittent situation.
I always do a visual on this style pcm connectors, I could see they were not spread by eye. I will perform pin drag tests on pcm with mico connectors to verify proper fitment
No Bus code is usually a super simple ground issue. Just gotta find which ground.
I have a 99 Dodge Dakota that has an electical issue, the grey hardness attached to the computer is not sending a signal to the computer. I got it running a few times when I was playing around with the grey hardness that's attached to the computer. I replaced the grey hardness with another one but it's still not working. HELP! what can I do to get it to work?
We are having the same thing happening right now with a Ram 1500 2002 5.9L any suggestions
I have a 2000 dodge ram 5.2. That had the same issue but if i let it sit for a few minutes itll start up and run. Could that be a bad PCM?
Question for you sir. I have a 2005 grand cherokee 5.7. I had the transmission turbine replaced as well as the temp sensor I even out an oil cooler with a fan for the transmission. I use my Jeep then after turning it off, I want to restart it and it would stall after 10 seconds and I would get the "check gauges" and "over heat transmission". I used my computer and it shows "lost communication with ecm/pcm" I checked the wires and had some damaged I repaired them and even put heat resistant tape and protection since they are next to the exhaust. I really don't know 2hat to do at this point. Ant tips would help.
What codes are setting in the modules?
Where did you get your replacement PCM? I had a failed PCM on a 97 ram (no bus comm and wasn't even providing a good 5V rail) and the replacement unit I got seems to be faulty as well (misfiring horribly and setting injector 7,8 performance codes). There are so many aftermarket vendor "rebuilders" out there, all of them claim to fully test the units before they send them out, but after this experience I don't really trust them.
Where'd you get your pcm from bro I have to get a new pcm and wandering where too go to
Where is part 2? Hi, mine is a 1998 2500 V10 4x4. Same codes 920, 921 and 999. BUT, my truck starts everytime and runs pretty well. Dosent shut off while driving either. I'm in Florida and it's pretty hot here. No issues other that my guages not working. The dash lights work fine. Taking out the problem everyone else has with no start. Would I check the same things you did in the video?
Part 2 in up on my channel.
I have a dodge Dakota 3.9 with a no bus5. I don’t have any way to check the pci wave. No 5 volt on tsp, did all the other Test that you showed. Would it still be a pcm? And we’re would be the best place to buy one? Thank you for your channel. Tracy
Best to find a shop that can properly diagnose your issue
I dink my son ride is doing same thing...I had them replace fuel pump and crank sensor and still nothing.....just upset n crying.....a mon tryna help my son with his ride but no luck. . where do I order a PCM....
My favorite 😻
New Level Auto your talking about the Zeus huh Keith 😂😂
@@codysautodiagnosticsprogra8706 😂 ahhhh no . Jeep No comm is my specialty 😉
New Level Auto I definitely knew it had nothing to do with that expensive pos
Good afternoon Cody, I checked your awesome video and I followed your testing procedures. I have a 1998 Dodge Ram 1500 5.2. The truck all of the sudden shut down and it just cranks. It’s got fuel but no spark. My cousin started throwing parts at it and replaced the fuel pump, crank position sensor and the ignition rotor. I verified it and indeed has no spark. Has no communication in the DLC. Gauges are pegged to the left and won’t move. I checked the following:
-Verified powers to pins 2 & 22
-Verified grounds to pins 31 &32
-Checked the resistance on the ignition coil tested good
-Checked the ASD and tested good
-Verified 5 volt reference and it was good
-Wasn’t able to test pin#30 for the signal coming out (no uscope)
-I suspect a bad PCM
Any recommendations?
Does the pcm put out a 5v reference? You can check this at the throttle position sensor. Also will the scan tool communicate with the pcm?
Alf r - were you able to find the problem?
@@codysautodiagnosticsprogra8706 same truck same problem. Svan tool does not communicate. Need new pcm?
Yo so I got a 06 dodge with a p1603 code but don't have enough to take it to dealer for pcm can I set it to Vin at home and if so how?
My 2018 Dodge Charger is shifting sporadically and slipping gears and the electronic stability control is flashing, also various other electrical issues, car occasionally won’t start. I’ve swapped PCM’s already. Any other ideas of what may be going on? It’s still not starting occasionally and the first code it gave was P1614 “ECU reset/recovery” and also some “high circuit voltage” codes. I’m wondering if it may the wiring harness going from the pcm?
Hm that’s going to be hard to say without actually looking at the car. Have you checked the alternator voltage output and also the AC ripple? Ripple can cause lots of drivability issues with pcm and sensors.
Cody’s Auto Diagnostics have not. Just got the car towed. The common reoccurring code is the ECU lost communication with the TCM and camshaft position sensor needs service. It all started after I got new struts and control arms. I’m wondering if the shop may have possibly damaged any wiring associated with the TCM. I’ve heard the CAN bus may be responsible too
Nice job here with proper diag. I run around programming ecus for shops. (Yes many are so bad that they pay us to write the vin on Chrysler). Usually the guys replace the pcm even when it's just a wiring issue. You are a proper mechanic. There's a ridiculous amount of mechanics, all immigrants, that i have to run behind and fix because they have no clue what they are doing
Thank you buddy, I try to be the best I can and definitely don’t like shotgunning parts at anything
Facing a wiring issue for my o2 sensors for my 2000 Durango. Are you still located in Tucson? Which shop?
Yes I’m still in Tucson. I’m at borst automotive on golf links
P0505 code on a 2000 Dodge Durango 5.9L 4x4. Test for power at IAC. replaced and clean throttle body with new gaskets. Clear code and turn ignition switch back on, code come back right away. Can you help…
I have a 2001 Dodge Dakota I’m having the same issues but sometimes it will start but then after driving it dies. But all the same symptoms as you showed in the video. The strange part is that sometimes it’ll run sometimes it won’t but then it does. Any suggestions?
Check all powers/grounds/5v and pci circuits when symptom is acting up, is the best thing I can say
so what is ccd vs pci xmit and receive?
I’ve had a unlocked pcm and Diablo tuner in my 2017 ram slt for a few months. Did a parameter change one night and. Ow says no ECU detected. Put the key in and everything lights up, stereo comes on, etc. turn the key to start and nothing. No fuel pump, no ignition, nothing. You can hear the relay click when you turn the key. Dealers have no idea, Diablo has no idea and the performance shops have no idea.
Cody I have a 98 dodge 12 valve that starts and runs perfect ..it charges 13.8volts and I have 2 problems first none of the gauges work and I did the cluster reset and they all work during test the odometer flashes and has the 920 921 999 codes come up and the other code when I put a code reader on it is p1492 batt temp sensor voltage to high any help would be appreciated thanks!!
Hmm interesting. I’ll have to look up a diagram and see if I notice anything
Hi, mine is a 1998 2500 V10 4x4. Same codes 920, 921 and 999. BUT, my truck starts everytime and runs pretty well. Dosent shut off while driving either. I'm in Florida and it's pretty hot here. No issues other that my guages not working. The dash lights work fine. Taking out the problem everyone else has with no start. Would I check the same things you did in the video?
Is this same as no-hub?🤔
I've replaced the PCM twice and still having the same issue. It will run now but it is giving all the same codes and no bus signal. What would be your next suggested place to look. Keep in mind I've already changed the speed sensor and the ignition sensor.
I would want to look at a wiring diagram and see what other modules are on the network with the bus. There could be another module bringing the network down. Also have you verified good powers and grounds?
@@codysautodiagnosticsprogra8706 Yes. That was one of the first things I checked. I traced the wiring back to the fuse box to see if there were any connections that were bad, faulty, or missing. Still couldn't find anything. Took it to a dodge dealership and they are saying that they can't communicate with the computer. I'm almost thinking I've had two bad computers. The first one I got on-line from a refurbished place. And the second one I got from OReillys. I don't really want to pay the dealership but I'm kinda running out of options.
@@christopherezzell1993 ever figure it out? Crank sensor is another sensor to look at. The one you have to acess by taking off wheel and fender well.
👍👍
Mine did that after putting on the parking brake there's a wire harness behind it push foot against it and then try it works on mine
Will a bad ecm cause my odometer/speedometer to completely disable?
I changed the ABS rear speed sensor, still nothing.
Everything worked then the truck sit for six months and when I went to turn on the engine the whole instrument cluster went dead.
No sir, it sounds like you now have another issue.
@@codysautodiagnosticsprogra8706 after doing more research.. Like finding a needle in a haystack.
Apparently 02 dodge and certain models get corrosion underneath the smart fuse box. We'll see round 4 🤞
Hey Cody I have a ram 1500 and I am not getting the 5volt ref is that a bad pcm?or should I look at a sensor
It could be either pcm or a 5v sensor is shorted which is causing pcm not to communicate. First Disconnect of 5 V sensors and re-check For your 5v reference. If still don’t have reference then needs new pcm
Yea disconnected maf,cam,crank,tps,and it goes up like 4 v that is is there another sensor I could be missing
Bonjour from New Caledonia (NC), little French island near Australia and New Zealand.
(Please, do not take care of mistake)
Perhaps, you will be able to help me
Friend of me have a problem on a dodge ram 2500 from 2004 (not sure about year), bring to a few garage but still have the problem.
A lot of problem before, but now.
The truck crank and start, good idle, good acceleration but we have "no bus" message on the dashboard and no indication about temp.water, no rpm/mn, no fuel jauge etc...
My friend send the dashboard in America for a control and idem for the PCM witch cost him a lot of money (the PCM still no good, 3 cylinders no good), its good with the second PCM.
here, a garage took him 1200 USD to sent it to USA, repair and go back to NC, (the garage left the bill reparation in USA, it was only 250 USD).
So, my friend have controled the continuity of the can bus (J1850, one wire) and all the can wires are ok.
The other can low is the ground.
Next week, we will try to find the problem.
I'm a electrician, so i know what a voltage, current, resistance, frequency.... got multimeters, diag tools (delphi ds 150e (no good for this car) but also mini thinkcar pro and an Autel mk808z witch is good for this truck
But i do not have scopemeter to control the can bus signal.
I have to buy one, but at this time, do you think you could help us.
What should i control ?
What about the TPIM module ?
How generate the canbus, the PCM ?
Thankyou for helping us.
Merci beaucoup 😊
Hey cody! I am having a weird stalling issue on my 06 chrysler 300c 5.7. The car only stalls after a cold start and it does it after the car has been running for a few seconds (usually stalls if I accelerate too). My mechanic is not sure what the issue is and is about to charge me crazy amounts of money to guess and check. It is only spitting a lost communication code too (lightning bolt tbc, check oil, check engine light). Any help would be a life saver for this broke college student!
Leo Leo what’s the communication code and what module is the code stored in?
@@codysautodiagnosticsprogra8706
Code U0101 for Lost Communication with TCM. I don't have the car currently but I can tell you exactly what it is tomorrow!
Happen to look at any data while vehicle stalls
@@codysautodiagnosticsprogra8706
So I diagnosed it as a bad ignition coil. I checked the data and the other ones seemed to work fine but one was showing some odd drops (checking the data) instead of misfiring. Replaced it and it seems to run better now
Leo Leo thanks for the update buddy, I’ve see coils cause lots of issues in a vehicle, more then just misfires at times
I'm having a similar issue with a 99 Ram 5.9l. we tested the old pcm found it wasn't communicating and replaced. The refurbished one still does the same thing. I can't find a new computer from Dodge. It runs for about 20 minutes and then no bus returns.
The crank and ignition were replaced recently and the truck was hit on the left side months ago. Ever since it's been acting up. Can't seem to find any broken wires.
Any ideas where to go from here?
You will need to find a used or reman module, have it programmed to the vehicle.
The truck was in an accident so it ended up being a ground. The original computer worked after it was fixed.
I have a 2001 Dodge Ram 1500 5.9L two wheel drive. My battery gauge keeps dropping to zero after driving the truck just for a few minutes the alternator and the battery are tested and came back good. I don't know what the problem could be I also clean and best all connections to make them better so I don't know what it could be can you help me before I send the truck to the junkyard
This could be a cluster issue.does the voltage drop below charging system voltage?
I have took the alternator off and went had it tested and I've also done the same thing with the battery. I clean all the connections for the wires that do all the charging I am thinking it might be the ecm. I was just hoping that you might have a better idea so I ain't got to spend so much on buying the ECM
I have a 04 durango that will not crank. Replaced the starter and ECM and battery.Just clicks once when I try to start it. I think it’s the skim module. Any suggestions?
Are there any codes in any of the modules? I can’t remember if a skim module would prevent it from cranking and should be a crank start and then stall. You could have a voltage drop on the battery cables which is causing the issue
@@codysautodiagnosticsprogra8706 no sir no codes whatsoever. Battery cable voltage is good to go. They let broke off in the ignition about a year ago. I tapped on the skim module and got it to crank once. It like it’s not telling the starter to start
Sounds like my 2k Dodge Dakota intermittent "no buss" issue. Is there a fix?
Tyrone Walker in this case it was the pcm that was bad.
What if I have all the same issues but it does start?
I got a 2000 Dodge ram 1500 V6 5-speed truck, this past Friday I just finished up my V8 engine swap on it...I put a 360 in it out of a four-wheel drive truck automatic... on those it's pretty much plug and play except for the plug that goes to the automatic transmission.... now it's left dangling and it's giving me a no bus on the odometer... which is expected... my question is... I can't find a five-speed PCM is there anyone out there that can reprogram reflash or whatever, my automatic PCM and remove the automatic transmission control software out of it?... Or if they had a emulator that plugged into the automatic transmission plug would be fine too but finding such a thing probably isn't happening.... probably would have to build one....
Hey need some help with my 05, it won’t turn over but the little box that goes around the D for drive and the R for reverse etc... is not around them. Everything lights up when I turn key but nothing happens at all no noise. Car worked fine just took down dash to install a remote start, seen I needed another plug and put dash back up and now nothing, any help from anyone is appreciated
Check all fuses and make sure all connectors are plugged in.
Hi .. im auto electrician I have 2009 dodge Durango... which have gas pedel not working I replaced new pedel but still same condition... any idea which IC I chang to solving this issue?
I would be checking voltages at the pedal first for app 1&2 first
@@codysautodiagnosticsprogra8706 I checked by Another Ecm then car Accelerater work perfectly... mean there is no problem in wiring or something else... now I have one more ECM same modle but manual transmission... So I wanna now just which micro chip IC need to replace for manual transmission ECM to The car own ECM ..
Cody I have a 07 dodge ram 1500 4.7L. I have fuel spark and crank but won't start
Have you checked if you have injector control?
Are you in California? I'd love to have a shop to help for issues like this that actually does a good job
Sorry buddy unfortunately I’m not in California, I’m in Tucson Arizona
I have a 1999 Dodge Ram van 2500 I just changed the pcm and it’s still showing NO BU5 lights are turning on and it doesn’t read mph, temperatures, oil and gas shows airbag light on check engine light on
You have a bus issue that needs to be diagnosed
I have this issue I'm not getting 12v to pin 2 dose this mean its my ignition
What year make and model? I’ll have to check the wiring diagram
Can i buy a used PCM? If yes would i need to get it reprogrammed?
Some places sell them plug and play if you give info like vin and model
What is sending the signal to communicate to the PCM? Do you have a PayPal or accept Amazon gift cards, to walk through diagnostics for crank, no start with no communication on a 04 Dodge 2500? Thanks.
Each module produces a bias voltage and when the module is communicating the module brings that bias voltage to ground.
I think I am having the same issue in my 2015 Chrysler 300. Hoping not to take it to the dealership
Have you checked codes in the vehicle?
👍
I got same exact diag on an 02 Dakota. I put new pcm in and still no comm. can’t write vin without comm. but the truck runs now and doesn’t say no bus.
What are your thoughts?
So vehicle starts and runs but still no communication with scan tool?
I’m using a Triton D8 scan tool. Comm on everything else.
The fact it starts and runs tells me there is a break in the network wires to the scanner. If it truly was a no communication with pcm then obviously it wouldn’t run.
And on my comment from 6 months ago...the truck that I'm having the no bus problem with....it still runs and drives....!!!!...
If I changed ignition switch 2 New keys old one no Chip ignition may not be communicating with pcu. Thanks
I’m not following what your asking. Changing a transponder key to none transponder does NOT cause a no communication with pcm, this will create a no start since immobilizer module is not seeing a transponder chip. Now if you replaced a non chip key ignition switch with a chip one that will not create a no start since there is no module looking for immobilizer information
@@codysautodiagnosticsprogra8706 It started with changed alternator new ignition switch coil pack and battery. Now no bus no comm, does a ignition need programming or is it my pcu cause it cranks goodbye just won't turn its frustrating dealing with it 2 mths.Thanks for your reply.
@@codysautodiagnosticsprogra8706 Now could it be a sensor like BCM or ECU, Fuse maybe, I hooked up a different pcm to look and the no bus light went off but still no start. I'll recheck all fuses and lines I guess. Something I can't see is stopping it turning over, don't have funds to tke it to a shop or tow it.
No BUS only appears on my 1998 Chrysler cirrus after driving it after a certain amount of time
And a I guess “symptom” that my car does is that the gages turn completely off and then that “no bus” appears it’s irritating
The code that my friends scanner read was p1698
Idk who to see or what to do to fix the car seems like the mechanic my grandfather took it to was a quack because LITERALLY NOTHING CHANGED . They only bandage the stuff that came FROM this issue
The brakes AND Despite knowing the diagnosis they unplugged repluged but to not avail
and I replaced the TCM
WTFFFF DO I EVEN DO
Need to use a labscope to see what module is bringing down the bus
if the crank sensor isn't sending signal can cause the issue too
No crank signal would not cause a no communication event with the pcm. A bad crank sensor would cause no rpm signal while monitoring pcm data pids. A shorted 5v reference at the crank sensor can cause the pcm to lose communication but the 5v ref was checked in this video.
Will you always get no bus if it was a pcm issue
No not always. You could have another module taking out the network or could have broken wires somewhere as well
How was you so sure that pcm is faulty if it had 5V reference
ivan drago because I wasn’t able to communicate with the pcm. I verified communication lines, powers, and grounds, plus 5v ref. If you have all of these and can’t communicate, then module is bad.
@@codysautodiagnosticsprogra8706 Thak you
2006 dodge ram security light flashes and doesn't communicate with the scanner when light isn't flashing it will communicate
Sounds like you have a communication issue
@@codysautodiagnosticsprogra8706 I do somewhere haven't hound it yet
Camera work needs some help!
I’ve tried the factory pcm and still the same thing
I have a 2002 dodge durango and it is doing the no bus
Follow the test in the video. Check powers and grounds at pcm, check lin bus signal and see what modules you can communicate with using a scan tool
What if there is no 5 volt ref?
Then you need to disconnect all 5v sensors and make sure a sensor is not shorted to ground, this will cause the computer to become a no communication.
What settings for voltmeter
It’s on auto ranging
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From Nick Ayivor from London England UK 🇬🇧 ⏰️ 20:08pm Good Evening
My 2001 truck works fine but no bus comes off and on all the time.
My Dodge Ram pops up with p1697. If anyone knows please help!!!!!!
Common problem with ob2 dodges
man , I thought I shake.
You probably do shake. My issue was the camera. Thanks for your comment 😵💫
Was that tps you unhooked
Yes it was.
I'd like to have a pound, too!
Damn shaking bad my friend maybe go see a doctor
No se ingleeeeess :-(