200 series, Pre-Collision System Malfunction issue & symtoms (2 Viewers)

[J 2 hundo]

Hi everyone! Long time lurker, first time post. If there’s an existing thread dealing with these particular circumstances, pls do notify me, appreciated.
So… long gasp.
-2020 Heritage edition
•ome suspension, low profile front bumper, gaggle of other goodies *none block the radar or sensors*.

-‘pre-collision malfunction, visit dealer’ notification. Traction control, triangle exclamation, and pre-collision icons appear in dash.
-This likes to occur when…
• Anti-lock brakes kick in more aggressively(usually if I forget to turn it off when off road).
• Crawl Control operates the brake system more aggressively.
• Turn Assist function operates.
• when smarty cruise control senses vehicle ahead and operates brakes automatically.

This problem combined with the above described operations that induce it aren’t too common in my various searches for answers. Please help!

 

[bloc]

Did you do or the dealer a zero-point calibration after the lift?

 

[J 2 hundo]

Did you do or the dealer a zero-point calibration after the lift?

No, not yet. Have had trouble getting a dealer to even agree to recalibrate due to modified suspension. I’ve had my suspicions that’s definitely at least part of the issue tho. Low overpasses will cause the truck to alert me as if there was about to be a crash.

 

[bloc]

No, not yet. Have had trouble getting a dealer to even agree to recalibrate due to modified suspension. I’ve had my suspicions that’s definitely at least part of the issue tho. Low overpasses will cause the truck to alert me as if there was about to be a crash.

That’s a good point, with your camera system I’m not sure how much impact a zero-point cal will have. But it’s worth looking into whether it can even be done independently.. that part of the process at least is pretty easy with Techstream.

 

[OregonLC]

I know my windshield glass guy can recalibrate late model vehicles, so if the dealer is being a stinker then maybe call a glass shop.

 

[J 2 hundo]

That’s a good point, with your camera system I’m not sure how much impact a zero-point cal will have. But it’s worth looking into whether it can even be done independently.. that part of the process at least is pretty easy with Techstream.

Agreed. I’m thinking calibration is for sure part of the success puzzle, but I have a strong hunch that there’s a problem within the ABS that’s provoking the issue. Crawl control used in snow & mud, as well as turn assist always set off the malfunction as they usually end up utilizing the ABS aggressively. Starting to sound like this could be a pretty deep rabbit hole.

 

[J 2 hundo]

I know my windshield glass guy can recalibrate late model vehicles, so if the dealer is being a stinker then maybe call a glass shop.

That’s a good idea. I’ve been really picky lately regarding who handles even the slightest of issues. Hell, just trying to find a shop who can do an alignment competently is a challenge. I’ll ask around amongst the glass shops and find out who seems to know what they’re doing. Appreciate the advise. Thanks much!

 

[Blackford Oakes]

That’s a good point, with your camera system I’m not sure how much impact a zero-point cal will have.

Hey @bloc. Can you expand on this? I have Bilstein 5160/6112 installed by PO on a 2013 (with front cam, obviously) and, while I have no error message, I definitely experience sensitive pre-collision functions when I need to engage the brake abruptly - truck brakes itself hard after taking my foot off the brake pedal and the seatbelts tighten. I have been trying to get the nerve to do a paperclip zero point calibration. Do you think a ZPC would solve my problem?

 

[bloc]

Hey @bloc. Can you expand on this? I have Bilstein 5160/6112 installed by PO on a 2013 (with front cam, obviously) and, while I have no error message, I definitely experience sensitive pre-collision functions when I need to engage the brake abruptly - truck brakes itself hard after taking my foot off the brake pedal and the seatbelts tighten. I have been trying to get the nerve to do a paperclip zero point calibration. Do you think a ZPC would solve my problem?

I was referring to the pre collision camera system in the windshield on 2016+ 200s. Whole different ball of wax than the front grille camera on earlier rigs like yours and mine. But yes I do think ZPC should help your vehicle, anything that changes the front/rear ride height relationship compared to stock applies.

 

[Blackford Oakes]

I was referring to the pre collision camera system in the windshield on 2016+ 200s. Whole different ball of wax than the front grille camera on earlier rigs like yours and mine. But yes I do think ZPC should help your vehicle, anything that changes the front/rear ride height relationship compared to stock applies.

Shoot, didn't bother to check his model year.

Thanks, as always, B.

 

[bloc]

Shoot, didn't bother to check his model year.

Thanks, as always, B.

Any time.

 

[linuxgod]

Zero Point Calibration is easy, you just need a paper clip and a few minutes. If ABS kicks in too often this can help.

After installing a lift you also might need to physically adjust the radar sensor behind the grill. I found after my BP51 lift was installed I’d routinely get PCS errors coming and going while towing. I suspected my front had less rake than before without the trailer, so the nose was closer to level and causing the sensor to point too high when towing. There are 2 screws you can turn to level it and aim it L/R if it’s off. Mine seems better now. Yours may be pointing too high or too low if you get PCS errors.

 

[Blackford Oakes]

Zero Point Calibration is easy, you just need a paper clip and a few minutes. If ABS kicks in too often this can help.

After installing a lift you also might need to physically adjust the radar sensor behind the grill. I found after my BP51 lift was installed I’d routinely get PCS errors coming and going while towing. I suspected my front had less rake than before without the trailer, so the nose was closer to level and causing the sensor to point too high when towing. There are 2 screws you can turn to level it and aim it L/R if it’s off. Mine seems better now. Yours may be pointing too high or too low if you get PCS errors.

LG, I appreciate your thoughts. I haven't experienced any PCS problems that a wipe down of the sensor didn't resolve, but had not thought to adjust it down for the lift.

RE: ZPC - In my mind I was thinking to bend a fork shape with the proper spacing out of the paperclip and use some electrical tape to secure it to something?

 

[linuxgod]

LG, I appreciate your thoughts. I haven't experienced any PCS problems that a wipe down of the sensor didn't resolve, but had not thought to adjust it down for the lift.

RE: ZPC - In my mind I was thinking to bend a fork shape with the proper spacing out of the paperclip and use some electrical tape to secure it to something?

Last time I did it I found a bent paper clip worked fine and stayed in place by itself. YMMV of course

 

[J 2 hundo]

Zero Point Calibration is easy, you just need a paper clip and a few minutes. If ABS kicks in too often this can help.

After installing a lift you also might need to physically adjust the radar sensor behind the grill. I found after my BP51 lift was installed I’d routinely get PCS errors coming and going while towing. I suspected my front had less rake than before without the trailer, so the nose was closer to level and causing the sensor to point too high when towing. There are 2 screws you can turn to level it and aim it L/R if it’s off. Mine seems better now. Yours may be pointing too high or too low if you get PCS errors.

Would you kindly share a few details regarding the paper clip method? I am 100% going to investigate this and poke around to see if a little adjustment on my own corrects things. Cause once traction control and/or crawl control or turn assist kicks the malfunction, that’s it! No more crawl control & terrain select. and even disconnecting the batteries for a while won’t delete the malfunction message. Dealer had to clear it last go around. Ugh, Goofy, tweaky tech!

 

[linuxgod]

Zero Point Calibration

It's not talked about on this site, but it's a thing in almost all Toyota/Lexus models - zero point calibration. I have not researched this topic enough to understand it fully, but it's generally recommended after any sort of suspension, alignment, steering rack work, that a zero point...

forum.ih8mud.com

 

[J 2 hundo]

Zero Point Calibration

It's not talked about on this site, but it's a thing in almost all Toyota/Lexus models - zero point calibration. I have not researched this topic enough to understand it fully, but it's generally recommended after any sort of suspension, alignment, steering rack work, that a zero point...

forum.ih8mud.com

Lots to unpack here. But there’s bound to be some info within that’ll be promising. ‘bout to get my Sherlock Holmes on!

 

[linuxgod]

Lots to unpack here. But there’s bound to be some info within that’ll be promising. ‘bout to get my Sherlock Holmes on!

It's pretty simple.

1. Reset the existing setting: Turn engine to on (but don't start), insert a paper clip between pins 4 and 12 as shown and just remove and re-insert it from one of the pins 4 times in a row. You'll get a flashing light on your dashboard meaning the ZPC cleared. Make sure the steering wheel is straight. Turn the engine off

2. Turn engine on and wait about 5 seconds. The traction control light will flash, meaning ZPC has recalibrated. Turn the vehicle off and remove the paper clip.

If you mess it up or you don't get the flashing lights you expect, just repeat the above.

 

[Omsok]

There is also a recalibration youcan do via software.

I did it once, but need to find the details again.