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Unable to recalibrate steering angle sensor

Discussion in 'Gen 3 Prius Technical Discussion' started by douglasjre, Oct 31, 2024.

  1. douglasjre

    douglasjre Senior Member

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    After replacing a broken steering angle sensor, I still get code c1445 which tells me that I failed to do the calibration procedure. I've done it with the paperclip method terminals 4 to 13. Many times I've cleared codes as well. What else should I try? What am I doing wrong? You know this is not the code ahead before when the steering angle sensor was broken. That was c1231 which is gone now. First time I've bought a Chinese part in a long time and I'm already regretting it. Defied my own rules and I guess I haven't learned my lesson PXL_20241031_173129685.jpg

     
    #1 douglasjre, Oct 31, 2024
    Last edited: Oct 31, 2024
  2. Tombukt2

    Tombukt2 Senior Member

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    I used my AP200 to do a bunch of stuff to the steering on a car recently steering angle and whatever else there is in that menu didn't have any problems doing it everything worked and held I haven't tried it with tec stream But obviously I know it does it or I might have done it on a generation too a while back.
     
  3. Brian1954

    Brian1954 Senior Member

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    Using a paperclip between pin 4 and pin 13 of the OBD2 connector is used for retrieving the two digit blink codes. It is not for calibration of the steering angle sensor.
    Blink (a/k/a Flash) Codes – How to. | PriusChat
     
  4. ChapmanF

    ChapmanF Senior Member

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    A jumper between pin 4 (chassis ground) and pin 13 ("TC") is most often used to blink out the trouble codes, as described in the link above. There are also a few non-scantool procedures for doing some thing or other that involve jumpering TC (and usually also doing something else). The repair manual describes those little dances, usually under headings like "when not using the Techstream".

    This C1445 code is probably worth looking up in the repair manual (which I don't have handy at the moment) for the details of what "vehicle driven with steering angle sensor not initialized" really means. There seems to be some goofy information floating about, including a YouTube video where somebody thinks he 'reset' the steering angle sensor by jumpering TC, and that might be where people are getting the idea that's even a thing.

    As far as I know, there is no manual calibration procedure for a steering angle sensor. If you view its reading on a scan tool when the car's just been turned on, it shows some bogus reading like -1300°. The reading updates to realistic as soon as you've driven straight for a bit, which the ECU can tell by the zero yaw sensor reading and the wheel speeds being equal. (So, this relies in part on the yaw sensor and there is a manual calibration for that, but it doesn't sound like anyone has disturbed the yaw sensor.)

    While I don't have easy access to the repair manual right now, this looks like probably the right C1445 details here.

    The language there about "calibration cannot be obtained" does not suggest to me that there's any manual calibration step you've forgotten to do, and more that the car's normal automatic calibration hasn't worked out for some reason, such as the angle sensor not working right, or reporting a value that is off by more than the auto calibration process expects.

    If there's been a recent change to the alignment or steering wheel centering, that repair manual excerpt does seem to suggest that relearning the yaw sensor zero point might help. There is a "when not using the Techstream" procedure for that, which involves jumpering a different ("TS") terminal.

    Edit: Ummm ... also ... the image you attached shows a C1345 code, not C1445, and C1345 isn't about the steering angle at all. If that's the code you've got, it's about wanting to learn the linear solenoid offset.
     
    #4 ChapmanF, Oct 31, 2024
    Last edited: Oct 31, 2024
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  5. douglasjre

    douglasjre Senior Member

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    Notice the code I got coming out is c1345 and the YouTube video is c1445
     
  6. ASRDogman

    ASRDogman Senior Member

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    I have the Xtools D8. I can read the codes and can set the steering angle.
    I've never done it but have seen it as I was looking through the menus.
    I will be in the Bithlo area Saturday until around noon if you want to give it a try..


     
  7. douglasjre

    douglasjre Senior Member

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    I think I found the problem. The numbering across the top row is one to eight from the top left to the top right and then the numbering of the bottom row starts again from bottom left to bottom right? Is that? So? Pin 4 is right above pin 12?
     
  8. douglasjre

    douglasjre Senior Member

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    Calibration sequence requires that you connect pins 4 and 13? I was connecting four and 12. Anybody done this procedure before? Anybody done it using text stream?
     
  9. Brian1954

    Brian1954 Senior Member

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    What exactly are you trying to calibrate?

    Where did you find information that connecting pin 4 and 13 will do this calibration? Can you post a link?
     
  10. Tombukt2

    Tombukt2 Senior Member

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    Yes I've done it with the Toyota software I can go turn on the CF19 toughbook and bring up the menu pretty quickly I do believe It has to do something with the steering angle sensor not the linear valve offset that's when you change the brakes or the brake actuator The thing on the firewall with all the brake lines linear valve offset The steering angle business that I'm talking about has to do with it if you change the power steering module in the car and something to do with something called an EMP or EMPB or something like that I'll have to look in the menu again but I brought up that menu and clicked next and it told me I had to be on level ground facing straight ahead so on and so forth and then push next and wait for something to flash or something along those lines and it did all that and that was that. Reason I was checking this is because I'm getting ready to change the electronic assist module in a mid 07 loaded car that I got for real cheap a few months ago and I wanted to see what I was going to have to do when I got it all back together.
     
  11. ChapmanF

    ChapmanF Senior Member

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    So is the YouTube video one you made or one you found online? And are you saying your car is giving both codes, or just C1345, or just C1445? They're different codes about different things.
     
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  12. douglasjre

    douglasjre Senior Member

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    Using techstream shows c1445 has the snowflake next to it, c1345 and c1451 also exist now. So now I have a total of three codes. I tried putting a Chinese steering angle sensor into the car. What a mistake this is. I'm going to order a used steering angle sensor and a used clock spring wire. Used as better than chinese. I knew better and I did this to myself anyway. Shame on me. I know better than to buy Chinese crap and I did it anyway
     
  13. douglasjre

    douglasjre Senior Member

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    YouTube videos I found online. I think you're right there's no way you could reprogram a steering angle sensor by making contact between 4 and 12 at least four times. I'm not familiar with this one. I do know about making contact between a couple of the pens so that you can get the transmission up the temp and the trans light will turn on but that's unrelated to this. I don't seem to be able to get the linear valve calibrated
     
  14. ChapmanF

    ChapmanF Senior Member

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    Once you have a C1451 (whatever you did to cause that to come up, maybe stumbled into an ECB Invalid Mode request), you can't do much else until you've dealt with that.
     
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  15. Tombukt2

    Tombukt2 Senior Member

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    Good Lord you have to go through all that I just leave the remote 15 ft away from the car some kind of nonsense I guess the cars asleep while I'm doing the brakes and doesn't try to push pull or do anything. Just like doing the brakes on the manual Corolla.