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Old 06-26-2020, 10:29 PM #16
JRLTRD JRLTRD is offline
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Because I have never heard of "zero point" ... searching now
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Old 06-27-2020, 03:55 AM #17
4runnerDFW1 4runnerDFW1 is offline
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Quote:
Originally Posted by Mack1611 View Post
Why not try the zero point, only takes a paperclip?

They charged diagnostic fee and completed a zero point calibration and down hill assist calibration. They performed a "health check to confirm dtcs cleared."
This solved issue. Only found out about this sensor issue after the lift.

Could possibly create expensive electrical short would be a reason not to
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Old 06-27-2020, 07:34 PM #18
CRB Racing CRB Racing is offline
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I just had a similar encounter with my dealer.
So I lifted my 2020 TRDP and replaced the stock wheels and tires with 285s.

After a few months the 2 PCS warning lights would intermittently turn on and off, then one day a PSC malfunction see the dealer warning showed up on the center screen.

I made an appointment and they couldnít reset the lights and clear the codes.

The service writer told me that the tech did some kind of alignment that was way more time consuming than a normal alignment and also tried to blame the lift. The fix would be to delete/turn off the PCS system.

I kind of argued the fact that others have lifted their T4R higher than mine with no issues. Plus I have a friend with the exact vehicle, lift and tires with no issue.

I asked if they checked the sensor itself to see if it was malfunctioning and he said there was no way that they could test it. My argument was that I spent all this money in a vehicle that came with this system and now you want to delete it, but you canít tell me if the sensor is faulty. Iíd be able to swallow that I caused the issue with the lift if they were to replace the sensor with a known working sensor and still not able to get rid of the codes and fix the concern.

The writer then calls over the tech because he seems like an order taker and knows little about cars.

I explain my issues and questions with the tech and he tells me that he had to plumb bob the vehicle on the rack to make sure the vehicle was centered and true. That seemed crazy to me because they sensor is solidly mounted to the grill, but Iím assuming itís in a TSB or there is some kind of instructions and thatís why he did it that way.

The tech did admit that he couldnít test the sensor to check if it was malfunctioning, so he replaced it and was able to remove the codes and complete the repair.


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Old 06-27-2020, 11:15 PM #19
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i've got a 2.5/2 dobinsons lift with 275/70/17s on a 2020. No issues with the sensors.

When I bought the car, the salesman I talked to says the sensors are rated for a 3 inch lift. Anything beyond 3 inches overall may cause sensor malfunction.

I personally havent had any issues with the sensor.
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Old 06-28-2020, 07:38 PM #20
Mack1611 Mack1611 is offline
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Quote:
Originally Posted by 4runnerDFW1 View Post
Could possibly create expensive electrical short would be a reason not to
Cleared all my lights after my 3" lift....
Yaw Rate and Acceleration Sensor Zero Point Calibration
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Old 06-29-2020, 02:03 PM #21
4runnerDFW1 4runnerDFW1 is offline
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Not an expert.

So it worked on a 2020!?

At dealer I was told this won't work. I think they can reprogram settings with toyota techstream tablet. Anyone know? Figured in this case worth the money vs creating new issue shorting something in plug if 2020 is different.
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Old 06-30-2020, 04:10 AM #22
JRLTRD JRLTRD is offline
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I'm also waiting for the same answer if this would work on a 2020 as well. Although, seems like my problem magically fixed itself, everything is working but like a previous post, it can be intermittent
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Old 06-30-2020, 03:56 PM #23
blutarski blutarski is offline
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Quote:
Originally Posted by JRLTRD View Post
Thanks all .. looks like I'll be heading to the dealership. I don't get any beeps, I only have this light lit up except if I turn on the cruise then set the cruise is when I get the explanation mark triangle.
Sorry for the delay in replying to this thread. I had the light you show but also my center screen continuously displayed the below error, radar cruise was the most obvious disabled feature as someone else mentioned. As others stated my issue did not appear until alignment was performed. Dealer didn’t find fault in independent shops alignment or know why alignment effected calibration. That said the dealer that resolved said following the standard Toyota recalibration did not clear the error and i recall them saying that one of the techs did something to the affect of skipping or providing miss-information on one of the Calibration steps. It’s been 3 mos without issue so happy to say it’s resolved.

I left a message for the service tech to see if ok to share the dealer contact in this thread or as a PM. I’m hesitant in case Toyota has issue with the workaround and would hate for this to blow back on the dealer. I will mention that Kevin from Toytec was instrumental in helping my find a dealer that could help and suggest reaching out to your lift vendor to see if they have any local dealer contacts. I was ready to give up as 3 dealers told me nothing they can do unless i return to stock. Unfortunately it seems Toyota HQ Has tied many dealers hands with my dealer saying they used to sell new lifted trucks until last year as Toyota told them stop.

It is puzzling that it seems random that some are not having this issue but based on details shared it does seem that post lift alignment is what causes the fault to be detected.
Attached Images
Help - PCS malfunction after installation of lift & tires-08e89ace-331b-4d2e-8f35-dbe21f2aa8e2-jpeg 

Last edited by blutarski; 07-01-2020 at 01:05 PM.
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