Schclung noise... (1 Viewer)

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Coccobill

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Feb 27, 2017
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Land cruiser 2018 18k miles. Started to make this noise. It happens every time I turn the engine off and on after few yards of driving. It does it only once until you turn the engine off and back on... sounds like a "schlunk". Coming from the central consolle possibly engine bay. Driving me nuts... Hope anyone has any idea
Thank you so much

 
Coccobill said:
Land cruiser 2018 18k miles. Started to make this noise. It happens every time I turn the engine off and on after few yards of driving. It does it only once until you turn the engine off and back on... sounds like a "schlunk". Coming from the central consolle possibly engine bay. Driving me nuts... Hope anyone has any idea
Thank you so much

Click to expand...

No one wants to try a guess? I obviously went to the dealer and their rule is very simple: "no flashing light on the dashboard, the noise is normal every car makes it... "
Oh well....
 
This sounds normal to me. I believe it is the brake booster pressurizing the system.
 
Last edited:
The buzzing brake booster is normal.

OP this sounds like an electrical relay. Is it coming from under the hood or interior near footwells somewhere?

If you can identify it, it may just indicate some circuit is switching on or it could be bad relay.

Isolate the noise and that would be first clue. I dont think its necessarily a huge issue but a relay clicking. I know dealer is hopeless so i feel your pain on that one. Hopefully a simple misbehaving component. Cheap and easy.

Thats my best guess. I know “gremlins” are a pain, do report back.
 
AnyMal said:
The buzzing brake booster is normal.

OP this sounds like an electrical relay. Is it coming from under the hood or interior near footwells somewhere?

If you can identify it, it may just indicate some circuit is switching on or it could be bad relay.

Isolate the noise and that would be first clue. I dont think its necessarily a huge issue but a relay clicking. I know dealer is hopeless so i feel your pain on that one. Hopefully a simple misbehaving component. Cheap and easy.

Thats my best guess. I know “gremlins” are a pain, do report back.
Click to expand...
Thank you for your support. I will continue my testing and try to find the source. So far what i know is that it does it if the car is put in motion, if I stay idle no noise. It happens faster if I accelerate. It happens in 4 hi or 4 lo and in reverse as well. After turning on the car, I can stop the car (operate the brakes) and start again with no appreciating difference in behavior if within the initial 15 yards. Switched off air conditioning without any difference.
If I only knew the sequence the car goes through when first put in motion, it would be a lot easier...
I will report back, this is driving me nut.
Thanks
 
Coccobill said:
Thank you for your support. I will continue my testing and try to find the source. So far what i know is that it does it if the car is put in motion, if I stay idle no noise. It happens faster if I accelerate. It happens in 4 hi or 4 lo and in reverse as well. After turning on the car, I can stop the car (operate the brakes) and start again with no appreciating difference in behavior if within the initial 15 yards. Switched off air conditioning without any difference.
If I only knew the sequence the car goes through when first put in motion, it would be a lot easier...
I will report back, this is driving me nut.
Thanks
Click to expand...
OK, it seems it comes from engine bay, only if I accelerate. If I coast w/o accelerating it does not do it...
 
I’m pretty sure it’s not this, given the youth of your truck, but it’s worth checking because of your description of when the noise occurs. And it is an odd noise.

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We've been through quite a few in the Canguro Racing 200 Series, to the point we eventually went to hard mounts for the engine and transmission mount. BUT, how many other failed engine mounts have you experienced or seen?
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They may have forgotten to grease your driveshaft? Another WAG but things happen.

That wouldn’t necessarily come from the engine bay though.

Thats what i would try next if its happening on acceleration/ decel.
 
AnyMal said:
They may have forgotten to grease your driveshaft? Another WAG but things happen.

That wouldn’t necessarily come from the engine bay though.

Thats what i would try next if its happening on acceleration/ decel.
Click to expand...
Here is the latest, I was told it could be either Abs or power brake motor. What is a power brake motor?
Thanks
 
Coccobill said:
Here is the latest, I was told it could be either Abs or power brake motor. What is a power brake motor?
Thanks
Click to expand...
Others on here will be able to go into more detail, but basically the power brake booster is an accumulator that is pressurized by a motor. It’s up by the brake fluid reservoir, so you should be able to isolate the noise to that location if it’s the booster.

It may be the ABS doing a self-check, but that would happen only when driving and first starting out. And you indicated the noise has just started happening, so it’s something new.
 
Sandroad said:
Others on here will be able to go into more detail, but basically the power brake booster is an accumulator that is pressurized by a motor. It’s up by the brake fluid reservoir, so you should be able to isolate the noise to that location if it’s the booster.

It may be the ABS doing a self-check, but that would happen only when driving and first starting out. And you indicated the noise has just started happening, so it’s something new.
Click to expand...
Could it be this? T-TT-0538-19 Toyota Technical Service Bulletin - https://www.tsbsearch.com/Toyota/T-TT-0538-19
 
IMHO the ABS click is much louder than what is in your video.
Its a known clunker and if you use CRAWL you will immediately see what that sounds like. And its totally normal.

Im far from an expert, but that sounds exactly like a relay to me.
 
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