Civic Needs a BCM... Part 1 The Real Diagnostic Testing! 

Best diagnostics channel on youtube!

The correct sarcasm is unreal!

That was really impressive. So the customer would have ended up paying for a BCM and a fuse box and other stuff that they probably found along the trail to the fuse box. 😳

WOW holy carnage, Jake! Quick tip on avoiding cutting wires...just use a test light to ground while watching the amp clamp on the wire to determine the source of the voltage via current flow direction 😉

I don’t know about the rest of y’all but I am eagerly looking forward to Part 2 where this poor Civic gets the BCM it so richly deserves!

Honda diagnostic flowchart: Read DTC, replace corresponding module. If no results, continue replacing modules until all modules are replaced. If still no results, sell new car :-) Loved the well deserved sarcasm! Superb diagnostic and thought process, Jake! Appart from the fuse box (and the BCM, of course), there may be a problem with whatever that carbonized relay used to power when good. Nevertheless, a loose connection can scorch any material with high current flowing, even if no other parts were bad. Seems Part 2 may bring some more interesting bits of information :-)

The sarcasm is priceless haha. Great diagnosing and always nice to watch the practical way you solve the problem

Love it Jake, keep'em coming, and thank you..

Some of these flow charts are so stupid, it's baffling. Step 1: Turn key to start position, does engine start? Yes goto 2, No goto 3. Step 2: Go to step 3 Step 3: Replace Engine Assy

Your humor is awesome, thanks for sharing! What a melt down

Great diag and thought process. Wonder if a low amp clamp over those wires at the interior fuse box could’ve determine direction of current flow without cutting.

I think that "diagnosis" flow chart, was setup by one of the BCM programer, and the poor guy never thought other things could fail. Regarding the cable cut, assuming the fuse box was not burnt down, you can measure how current is flowing with your volt meter. A cable has a resistance, and if looking at the diagram you see current should flow in certain direction, there will be a voltage drop on the cable. When you turn off the car, check that same voltage, and if changes polarity, that means current is flowing in the opposite direction. This helps find this feedback issue between the two cable you cut, but without cutting them. Voltmeter needs to be in mV scale, but your does.

Waiting patiently for next video but I’m going to say it’s the AC clutch relay.🤷‍♂️ WAG… Because many times I’ve had Honda’s come in with dead batteries and a draw and it was the relay, but I’ve never seen one melted down like that.

BCM stands for fusebox ... Apparently🤣

Awesome, I guess you'll add hondas on your nissan list, great intro you should do standup

Wow! Did not expect that

Jake at 40:40 "Holy shit, I don't know what to do" when pulling the relay out is the best comment you've made in all your videos. I think I would have disconnected the battery and pushed the bloody thing outside before it burnt my workshop down 😁

I cant believe the BCM melted like that. Cant wait to see why that defogger relay was stuck on.

Amazing it didn't catch fire !

I like Honda's service info because it's so humorous-Try a VSA and then try a PCM. But recently other manufacturers are following their example. Ford for one. Edit-Rear window defogger relay (M1) per ALLDATA's box view.

At 39:20, yes, the thermal camera would find it, however, it is a very good thing you followed the circuit path because there is a big learning value that transfers to other electrical diagnostic problems, including learning how to use diagrams. Great video.

😂well this was different . That is one fried really . I wonder if it shorted out anything else those relays in that wares looked pretty toasted . Looking forward to part 2 . Thanks for sharing .Haven’t seen one that cooked that bad . 👍 Artie

A thermal camera would work well for a job like this.. Whatever is pulling over 20amps, it's going to be heating up a LOT. That would be my first move

I suspect of the 3 relays the moment i saw them. Personally i would prefer go to the fusebox y remove the 3 relays to confirm that the circuit going through pin C8 wasn't the problem and don't cut or depin the connector. Great diagnostic btw!

Good thing the "fuse" in the fise box did what it was supposed to do....oh wait, the relay did the fuses job. 😅

outstanding nicely done .

Well done 👍

When I saw 20A+ drain, my first thought was "thermal camera." That's gonna be a ton of heat somewhere. Also, no way would I start poking around in that crispy fuse box without disconnecting the battery first (and the maintainer, obvs).

I wouldn't put it past them to have the code short the BCM internally when it is set. Much like Voyager did when the antenna didn't receive a signal that wasn't sent. Fry the antenna lead and use back up.

lol funniest video yet! Love it. Honda’s diagnostics always use to end with install good known “part” and retest. I would probably say it is the a/c relay if I had to take a “swag” (scientific wild ass guess) seen a lot fail causing draws and or just not functional.

Grasias

Holy shit, I wasn't expecting that, total melt down....I wonder what caused it.

also codes for seat heater circuit, drawing 20 amps

You can tell these people building these things and writing service information have never worked in the field. They don’t even think about the possibility of a burnt up relay or fuse box back feeding a circuit.

well I already cut one wire let's go ahead and cut another one! that's the spirit!

If it had a better battery in it you would have been able to find the problem from the blistered paint on the hood.

Honda flow charts are garbage. They hardly tell what sets the code or theory of operation

im gonna guess green crusties at 18.41 with bulb check. lets see

No way you didn't know the fuse box was melted before you cut them wires 😂

Mr Jake . Can you please explain to me why the first test (194) didn’t lead with 14 something volts? 14 volts is plenty to light it right?

This is to streamline the process so a fresh out of school tech can get the job done and the customer on their way hoping that at least 80% of the time it is the BCM. Every single manufacturer has these kinds of flow charts and it boggles my mind they want techs to follow these to a tee. This is a bunch of engineers that come up with this crap because they think they are better than everyone else. They will put together the most simple and condescending chart they can to not only make fun of new techs fresh out of college, but to insult their intelligence. Then to make matters worse, the service manager(which normally don't know sh*t) makes everyone follow the engineering flow chart that was created by biased and unhelpful people. A friend of mine took his charger to the dealer because he had gasoline puddles under his car. The service manager called him up and had him stop into the dealership just to tell him he had 2 fuel pumps in his tank. The guy seemed completely clueless and was telling my friend this like it was the first time he ever seen something like this. My buddy was like "yeah, the driveshaft goes through the middle and the gas tank has a hump in it. The service manager said that it was not the case and that both fuel pumps were part of one unit when they were two separate units on either side of the hump.

Another big problem that I saw is the car was off so the generator was not working and still 14.13 that is crazy . I don’t think is normal. Do you? If so why ?

Omg someone that actually used truspeed motor. Can you tell me if its worth the 600-700 a year subscription on the autel? I didn't want to commit till I was actually was able to get a review or a few opnions about it. Right now I share Alldata with another shop and its been my favorite SI for the last 10 years, compared to Prodemand.

Why not go after that huge battery draw first? Just wondering what made you go down the bcm code road

Does vehicle have a nice bulge? YES Replace BCM

Is the diagnostic procedure a marketing technic to sell parts? Or are the engineers writing the diagnostic procedures that stupid? Is there a third explanation?

If I was you, I would put a BCM in it and if that didn't work, assume it's defective and put another one

I agree with honda. Put a bcm in it. Lol

wow i thought i had it bad earlier in the week with a 400 ma draw 🤣🤣🤣🤣 but 24 amp yep they were in trouble . mind you again i was screwed on the drawing . lucky for me i watch this channel “never trust your drawing “ it did not show me the full circuit to many wires in one of the plugs i tracked it down to federal car spider and oh what’s this a what i call billy bob button (emergency roof realise button) apparently a requirement in your neck of the woods ie the states . mind you the gap between the roof compartment and the roof cover that would have to be one skinny kid to get trapped in there 🤪🤪 but the button was the culprit unplugged draw went away . i guess what i am saying is thank you 🙏 lucky i had seen you do many a draw and i don’t see them all that often in the plant . oh and they did swap the bcm before they called me 🤣🤣🤣🤣🤣

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Don't edit anything Jake your only telling the truth thanks great video

Retract the claws! Holy SMOKES! Newer fuse boxes are such a disaster....

36:56 All time asking my self is it easier to watch with thermal camera and then looking reverse? Because that amount of amps will show gloving something.