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"BRAKE!" Warning Light While Turning Left At Intersection

Discussion in 'Prime Main Forum (2017-2022)' started by hox, Dec 20, 2020.

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  1. pghyndman

    pghyndman Active Member

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    I've grown fond of license plate "vaults" (acrylic face and gasket seal) such as the WeatherTech units that protect the plates while being sufficiently svelte so as to not obstruct the state or veteran info:

    PlateFrame.jpg
     
    #41 pghyndman, Jan 14, 2021
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  2. Hicksite

    Hicksite Member

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    Nice, but how does the plate stay on if the frame doesn’t cover any part of it?
     
    #42 Hicksite, Jan 14, 2021
  3. Trollbait

    Trollbait It's a D&D thing

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    The screws that go through the plate's holes into the mounting bracket of the car.

    Likely abandoned because it wouldn't work in markets with differing size plates, and a possibility of blocking something if a state made a change to their plate, but still the best plate mount was on my first car; a 1986 Buick Park Avenue. For the rear, you just opened the trunk, and dropped the plate into a slot.
     
    #43 Trollbait, Jan 14, 2021
  4. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Show of hands to get back on-topic? I know I’m as guilty as anyone lol.
     
    #44 Mendel Leisk, Jan 15, 2021
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  5. jerrymildred

    jerrymildred Senior Member

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    This is really strange. Mine has tried to brake on me a few times when it didn't understand my intentions, but I just power through it. It has never overridden my right foot or forced me to shut off the car.

    It sounds like a trip down Techstream lane is in order. That is, assuming the airbag ECU retains the data this long.

    If you had gotten part way around the corner to here:
    Screen Shot 2021-01-15 at 7.16.47 AM.jpg
    I could see the signal light pole triggering a panic attack depending on the direction of your car and your wheels. But not a lockdown like you had.
     
    #45 jerrymildred, Jan 15, 2021
  6. pghyndman

    pghyndman Active Member

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    Fair enough, but I am not convinced that something integral to the car was not the cause (this includes the front detection system circuitry or anything that might impede its correct operation). From the OP:

    3. The constant collision error coming from the front right sensor. This goes off every time the car rolls to a stop. I have cleaned all the sensors with a microfiber towel, which did not fix this issue.

    It is not unreasonable to suspect a collision warning, however triggered, could have triggered the braking action,
     
    #46 pghyndman, Jan 15, 2021
  7. Trollbait

    Trollbait It's a D&D thing

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    Outside influence could trigger the event, but how would such cause the car to not exit the event except by shutting the car off?
     
    #47 Trollbait, Jan 15, 2021
  8. Tideland Prius

    Tideland Prius Moderator of the North
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    Wait, so it was ICS that triggered the warning?
     
    #48 Tideland Prius, Jan 15, 2021
  9. hox

    hox Junior Member

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    I followed the recommendation from Toyota's customer care line and left it with the dealer, for several days. I gave them as much time as they wanted to do a full diagnostic. They found nothing wrong with the car. I have no idea if they actually used Techstream, or what level of analysis they did. What I got back was a dirty car, that had 1/4 tank of gas used, a clock that was showing 4 am, and 70 additional miles on the odometer, and every setting changed including leaving the car in PWR mode. I specifically asked if there was an error code stored in the ECU and the tech stated that it would be very difficult for them to ascertain or retrieve this code if it existed.

    Given this experience, I have no confidence that this dealership would do the work necessary to figure this out or if they are sufficiently skilled to do so.

    The infotainment/NAV system rebooted again this Friday. I had just plugged in a new destination and when I put the car into reverse and back out of the garage and it restarted and lost the destination. It is so annoying. The entire NAV system seemed to be zeroed out making me choose state and city.

    Can someone tell me if there is a way the bug that causes my infotainment/NAV system to randomly reboot can also affect any of the collision system?

    The random rebooting of the Info/Nav system really reminds me of a faulty PC workstation. I build computer systems to control instruments at work and when a system starts randomly rebooting there are some usual suspects to look at. The operating system also has an error log that helps map the offending line of code or memory address.

    The tech at the dealership blamed the random reboots of the Info/NAV on Apple updating their IOS which is triggering the reboot error. I would argue that whoever wrote the operating system code (Toyota or a third party) did not do sufficient bench testing before putting this in their cars. It is buggy and needs an update, not ask customers and service techs to just grin and ignore the problem. I am sure the tech who told me " just don't pair your Iphone with the car" realized how bad that sounds.

    The issue is that the Info/Nav system reboots are random. If the dealership tech cannot get the reboot to occur, then there is a diminishing return to have a tech working on a car.

    The Toyota customer service rep, seemed to know that there was an issue with the Nav reboot with a full diagnostic being the starting point. I think to get this fixed will take a good deal of time to get someone at Toyota (corporate or dealership tech) capable of fixing this issue.


    Using Google,there seems to be similar occurrences with other Toyota Models. I will call Toyota back this week, and I will try and keep the forum up to date. It may be a few weeks though as I am in the middle of a major project with an due date in February.
     
    #49 hox, Jan 17, 2021
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  10. Elektroingenieur

    Elektroingenieur Senior Member

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    The dealer needs to retrieve the Vehicle Control History events, as I described in post #37; these will include details of both pre-collision system (PCS) and intelligent clearance sonar system (ICS) operation.

    The dealer’s technicians may not be able to interpret the readouts: they haven’t been trained for this, and the “Record Data Item Chart” in the Repair Manual doesn’t really explain many of the data items. The dealer can, however, open a case with Toyota’s Technical Assistance System (TAS), the dealer-only support line, which can escalate to the engineers in Japan, if necessary.
    I wouldn’t say it’s impossible for a malfunction in the navigation receiver assembly (also called the head unit) to cause a false activation of PCS or ICS, but it’s extremely unlikely. Toyota’s New Car Features and Repair Manual books explain that PCS and ICS are controlled by separate computers, including the driving support and clearance warning ECU assemblies, and their user interfaces appear on the combination meter. The navigation receiver assembly has no role in either system, as far as I know.
    Indeed. Dealers don’t have the information, equipment, or skills to repair a malfunctioning navigation receiver assembly, nor to fix bugs in its software. In practice, they can:
    • Install the latest software update from Toyota, for which “intermittent rebooting” is perennially one of the fixed problems. See Toyota bulletin T-SB-0031-20, “Audio Head Unit Software Update (Denso)” (PDF), April 1, 2020; there might be a later version by now. You could download the update file from securedp.toyota.com and install it yourself, but I’d let the dealer do this, so if the update fails, the navigation receiver assembly can be replaced at their or Toyota’s expense, not yours.
    • Reset the navigation receiver assembly to the default settings. You can try this, too; see “Deleting Personal Data,” page 72 in the Navigation System Owner’s Manual (PDF).
    • Replace the entire navigation receiver assembly with a refurbished one.
    • Download the log files from the navigation receiver assembly for analysis by Toyota. See T-TT-0611-20, “Multimedia Recorder (MMR) Download Instructions” (PDF), May 18, 2020. As with Vehicle Control History events, the dealer will need to open a TAS case for help interpreting the collected data.
     
    #50 Elektroingenieur, Jan 17, 2021
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