Prius owner: I can't turn off my hazard flashers! Toyota Tech: you need a new ABS control module. Customer: damn stealership always trying to rip me off!! haha Wow! Great diag, PJ!
haha! Luckily on THIS prius, the ABS module was covered under an extended warranty up to 150,000 miles. But the other prius mentioned in the video had over 200,000 and a new one was expensive.
@@PineHollowAutoDiagnostics yeah. I know a couple of techs that have without creating any issues. But I’m gonna be honest, i can’t find out why that circuit is ran to that module. I don’t know if during emergency braking, it causes the hazard lights to come on? I honestly don’t know what it is there for.
Thank you for this great explanation. I have a 12 Prius in the shop now and had the same issue. Unplugged the ABS module and the lights turned off. Many thanks!
Yo this is the same thing that happens in mine as well but what did you replace to fix it was it the ABS module? Because he mentioned flasher unit as well in the video
My 2012 has suddenly developed this problem, I may forward this to my mechanic! Thank you so much for sharing this info you really thought it out very clearly.
Great video brother , very interesting , iam a Toyota tech too and this is the first time that i see this ! Thnks for sharing , in my country i would directly cut the wire going into that circuit , cuz no one here is going to get a new abs unit for a hazard light always flashing , even removing the hazard fuse and never using them again would be a better solution here .. keep up the good work bro
@@VoltageDropDiagnostics Lol im from mauritania in West Africa , i just replied to one of your videos asking about something that i found during work , where can i contact you , if we can stay in touch !
Thanks. My scanner was telling me to press the skid control button. Couldn't find it. Looking at the diagram i saw an input to the skid control from the Haz switch. I was looking to see if it was a double pole switch. You helped me find the correct diagram.
Ouch, sucks to not see that in the diagram. At least they should put some dotted lines around that connector to show its incomplete. Thanks for sharing dude, very nice find! I'm going to go look at this diagram as well (Just saw the second diagram, still going to look at the diagrams available to me)
I seen that alldata had a redrawn diagram that also didn't show the skid control circuit. But i did see that alldata had the overall diagram just like toyota SI.
I have the exact issue with my 2014 FJ Cruiser. The FJ forums say it is the turn signal relay. I replaced the turn signal relay. The hazards lights are still on with engine on and engine off. I will try the skid control ECU tomorrow. Thank you for sharing the information.
Thanks for the video. Saved me a ton of time diagnosing a 2010 that just came in my shop. I ended up just cutting and taping off the blue wire that goes into the ABS module for the hazard light input and now the car is fixed and hazards work normally. I'm not really sure under what circumstances the brake controller would need to know if the hazards are on. Its not worth thousands to repair though.
@@thetahedgecapital1008 right by the connector under the hood. I tried to leave enough on the connector to splice back if needed. But there have been no issues.
I've done that as well. Cut the light blue wire at the ABS/Skid control plug. This stopped the hazards from flashing, but I still have a parasitic draw on the system of some 8 amps. So at first it seemed like it solved the problem, but later on I found the car dead again...Having a hard time finding the parasitic load. I've pulled a lot of fuses but the load remains. ABS Main #2 fuse didn't resolve anything either.
Hi PJ, fellow MDT from NJ here! I have replaced two of these already for this same concern. Not super common but they do pop up every now and then. Excellent video explaining how the hazards and skid control ECU are integrated.
hello thank you very much for your video because it helped me to identify the fault. Please can you tell me what color is the cable that can be cut in the connector of the ABS module. Thank you
Weird I pulled ABS main fuse one and the lights flashed when I moved but when I turned the car off the flashers turned off this time what does that even mean?
Happy new year and while you’re enjoying the long weekend I can’t bring my car in so thought you might be able to give me some peace of mind, or not please be honest… Last night my check engine light came on out of the blue along with the hybrid system warning light - as I was driving I could feel the engine ever so slightly hesitate, so I immediately turned around to go home because it was very very late didn’t want to break down somewhere. Sure enough 25 yards from my parking spot the car stalled hummer engine stopped and I think there was some dinging. I am mediately turned off the car I don’t remember why, maybe it told me to? But then I started it back up and was able to at least drive to my parking spot and left it for the night. The next morning I turned it on same two lights were on, check engine and HSSW… so I turned it back off. Opened up my owners manual to see what it meant couldn’t differentiate between the thermostat and the HSW so I quickly turn the car back on to compare and the check engine light along with it we’re both gone they didn’t come back on. Does this sound like it might be erroneously alerting? I wonder because two weeks ago a red light in the middle of the dash for airbags came on, I ignored it end it too just went away the next day it may have been two days but very quickly it was gone and I completely forgot about it until last night That didn’t have the check engine light with it of course but other than that it seemed like a similar false alert? Do you know I so want that to be what it is as I’m worried about my batteries are some expensive fix but then of course the electrical system can be just as expensive I guess so any unofficial tips or advice you could give as I pull my hair out of my head for the next three days? Thank you very much
Hi, thank you for the video. May I ask if you replaced the abs actuator? to fix the issue or just replaced skid control ecu? thank you again for the helpful video.
Great video. Guess you have to have access to numerous diagrams. Would you recommend if available going to an overall diagram first and then going to a specific wiring diagram? Thanks for the heads up stay well and safe Artie. 😊
After this vehicle, I think that I am going to first look at the overall diagrams first from here on out. I probably spent 45 minutes or more researching that circuit before running into the overall diagram that had more info.
Pat, my prius is a 2010. Is there a difference in the location of the ECU. Also, after you changed the Skid control ECU do you need to bleed the brakes? It would be nice to see or hear how the process works after you unplugged the ECU in the current video. Thank you for solving this nightmare.
@@VoltageDropDiagnostics Is the ECU for the 2010 the same process and located in the same location as the 2012? All you did was replace the ECU and bleed the brakes and it was fixed?
Would be cool to see a video of you programming the new module, if it's required. Did you have to bleed the brakes too or were you able to just replace the electronic portion?
No real "programming" needed. And it would need to have the brakes bled. And thats a pain. Usually takes about 30-45 minutes to bleed these systems after replacing those.
Is replacing this switch enough I have the same problem. Everything worked great in my car .I repair my car myself. Even the engine itself was replaced this year. In addition, I checked my Toyota prius 2010 battery myself today. It is in very good condition. I have a problem because the car only makes 36 miles. And recently it dropped to 30 m / g. The lights turned on by themselves and I am not able to turn them off until the battery is discharged. What should I mention, what part to get rid of this problem. Everything works great for me. Only the lights are flashing. Sorry for the language. I'm writing from Poland
What I got from this was that the skid control ecu needs to be replaced. What you said in a comment was that you replaced the flasher relay. And then bled the breaks with a scan tool. Did I get that right? Thanks so much.
Hazard Lights will just start blinking and will not shut off on FJ Cruiser. Had to unplug the Fuse. But there went the turn signals. How do I get these Diagrams for the FJ? Never done anything like this before. Thanks
Wow.. Like you said "This wire diagram is completely incomplete.!" Lol That sucks bro, They could have at least thrown some dots around that connector so you would know there's more to that connector. Wonder how this would look from another service diagram.? Hmm...I might have to look at that. Great work bud. Now every time I see a Prius with it's hazards on, I'm gonna think of you and that dang Skid ECU. 🤣🤣 Cheers Brother and thanks for sharing.
Great video , we had a Toyota auris with exact same fault . New abs ECU with actuator was needed making it very expensive. Just quick question regarding input,output signal from abs ECU ,would this make hazards warning lights flash in emergency stop ? also would it be safe to remove this wire from abs ecu ? I've not seen any bulletins (tsb)for this fault ,even though it's more common than you think .
That question is one that I dont have an answer for! You might be right about the hazards light coming on during emergency stops! Ill need to dig into one and see why.
I have Toyota perius 2012plus model then a year ago come same issue and today I got same problem when turn of car still hazard on even if turn of the car. Same problem what is solution.
Hey, my mechanic called a dealership and they seemed to say that plugging in a new skid control ecu was just the beginning. Is it as simple as plug and play or is it more complicated? Scanning or coding or resetting?
Is that because in the event of a crash the hazards come on? Also do you (or intend to) post your vids on other platforms like Odysee or Bitchute? Thanks!
No, this vehicle wasn't in an accident. At least as far as I am aware. I haven't heard about odysee or bitchute. This is the first that I am hearing about them! I will look into them.
I have a 2010 vw passat and once i had to stop real hard and noticed that the hazard lights came on automatically. It doesnt do that every time the abs activates... only during hard decceleration. So maybe it will ground the circuit if it detects hard decceleration to warn other cars
I have one question How can I connect my horn to flasher signal because when i lock door the flasher flash but no horn is connected to flasher circuit in Rav4
Happen to notice if one of the doors don’t actually lock? The horn won’t sound unless the door latches send a signal that the doors actually locked. OR there is a customizable feature that turns off the horn with door locks.
@@VoltageDropDiagnostics it is without horn sound from the factory but i want to connect horn with the hazard signal so whenever i lock it make peep sound like Altima
Q. I have a 2016 Camry 2.5l and car stalls randomly with codes p0015 p0017. I have diagnosed it on my channel. I decided to replace the timing chain tensioner and oil change. While it ran fine initially it stalled on me as I was pulling in. I heard what sounded like a timing chain rattle or valve train noise and then engine stopped. Turned ignition off and on again and it ran fine. Briefly a message (low oil pressure came on)... I revved it very hard and ended up with a p0016, p300, p0302, p0303, p0304. In your expertise is this a common occurrence? I have experienced similar issues with the 2.5l engines. Is there a TSB about it? What are the common fixes? Thanks bro
@@PineHollowAutoDiagnostics it's a salvage vehicle with less than 50k miles. I did replace the oil with toyota 00-20w. I do not have the vehicle maintenance history. I did a capture of cam and crank. When compared to a known good it was identical. But that was before the tensioner change and p0016. So I'm planning to do another capture to see whether it's still in time. The owner states that it's running fine though the CEL is on.
Darryl, did you find a fix for the turn signals speeding up when driving? Will replacing the skid control ECU work for that issue as well? Also do you know where the Skid Control ECU is located in a 2010 prius?
@@ohtro I had the same problem with the hazard lights flashing on their own and it would also flash faster when I drove it. The skid control fixed it. It’s under the cowl. I believe it’s all one assembly with the master cylinder and brake booster if I remember correctly. I also think it might have had an updated part number for another known issue. I had mine a couple years ago.
@@ohtro I don’t remember what year I had but I’m pretty sure in a 2010 it’s in the same place. You won’t be able to see it until the cowl is out of the way.
