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Thread: Renault "Tuner List" Head Unit/CD changer hacking - Controls

  1. #691
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    Quote Originally Posted by yaohui View Post
    this simulator is 11USD(include the PCB board, MINI-ISO rectangular connector, Atmega8L , Tantalum Capacitor and Welding)
    Ok, so do you think it can work on my Renault Megane Coach year 1996 with Philips DC 022 (before 2000) head unit (with analog input - no spdif) ??

    here are some pictures of the car and the HU
    http://www.giovaland.it/gallery.php?...ryalbum&aid=79

    I made a connection cable to link mini-iso with the iso10pin on my head unit so that wouldn't be a problem.

    In my hopinion, I'm pretty sure the simulator can work on my car...
    Do you think the same?
    All suggestions are invited ...

    Thanks very much for your help!

  2. #692
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    I am sorry if this is slightly off topic, but does anyone have any information on how to write on the dashboard display of a Renault Scenic (2005)?

    I have a Tuner List from 2005, and I have not disassembled anything yet, but I imagine that som kind of cable connects between the stereo and the dashboard.

    I would just love to have my own texts there... Track info of course, perhaps "Good Morning Göran" when I enter the vehicle, or (really really geeky) why not have the boot messages from my carPC (running Linux) scroll past there, when the system is coming up?

  3. #693
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    Quote Originally Posted by roseen View Post
    I am sorry if this is slightly off topic, but does anyone have any information on how to write on the dashboard display of a Renault Scenic (2005)?

    I have a Tuner List from 2005, and I have not disassembled anything yet, but I imagine that som kind of cable connects between the stereo and the dashboard.

    I would just love to have my own texts there... Track info of course, perhaps "Good Morning Göran" when I enter the vehicle, or (really really geeky) why not have the boot messages from my carPC (running Linux) scroll past there, when the system is coming up?
    As it's not really off-topic, I'm going to try to summarize what we know regarding this (which is not much).

    We're 99% sure that nothing can be done on the CDC emulator, because the CDC connection to the HU does not carry any ascii information.

    The dashboard display is not controlled directly by the head unit. Instead, it is driven by a "central control unit", which sits between the HU and the display but is also linked to the stalk controls (volume/next/prev/etc. at the right of the driving wheel).
    In cars that have a Carminat GPS option, this unit is different, and so is the display of course. The only common point is the link between the HU and the central control unit, via the yellow connector at the back of the HU.

    All we have for now regarding this connector is its pinout but it looks like a synchronous bus connection (CLK / DTA / IRQ), so it probably takes more than a serial port to connect to it.

    The protocol is probably interoperable as some head-units makes sell adapters to drive the display of Renault cars. For Pioneer, see for example the CA-D-PI 180.

    So I guess the first step would be to stick an oscilloscope on those lines in turn and see what travels there. It might be a standard transport protocol such as I2C (but well, there's also MIRQ...)

    Good luck.

  4. #694
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    Thank you, Vicne!

    Lets continue to ask newbie questions: what happens to the CD slot in the Tuner List Head Unit, if (when) you connect a CD Changer? Can you still use it?

    And where would the CDC normally be mounted? Are there already wires going there from the HU, or is that installed when someone orders a CDC?

    You say there are no ascii on the connection from the CDC to the HU, I guess that means that you can't have track title/artist name info on the dashboard, not even with the regular CDC?

    And last; looking at the hardware page doesn't explain one thing to me: When I turn off the engine and open a door, the radio will shut off. But I can still turn it on again with the power button. So the "open door event" does not actually turn off power to the HU, just tell it to shut down. Does anyone know how that is done?

    Sincerely,

    Göran

  5. #695
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    Quote Originally Posted by roseen View Post
    Lets continue to ask newbie questions: what happens to the CD slot in the Tuner List Head Unit, if (when) you connect a CD Changer? Can you still use it?
    Yes, of course, once you insert a CD in it, the HU switches to this CD, and by pressing the SRC +/- control, you can switch between AM/FM/CDC/front CD.

    In fact, adding a CDC changer (or an emulator) just adds a new source to the source list.

    And where would the CDC normally be mounted? Are there already wires going there from the HU, or is that installed when someone orders a CDC?
    Well, mine was mounted already under the driver seat (in a 2005 Scenic), but I think the place can vary according to models and other equipments.

    I don't think there is any cabling ready in cars without a CDC. I remember people on planeterenault forums discussing the best way to make the cables run under the carpets when buying a separate CDC...

    You say there are no ascii on the connection from the CDC to the HU, I guess that means that you can't have track title/artist name info on the dashboard, not even with the regular CDC?
    Exactly. Even if you buy a stock CDC with mp3 functionality such as the CHM 604, the display is limited to "track number" going from 1 to 99...
    The documentation states that textual information is sent, but many people have tried on Tuner List HUs without success...

    And last; looking at the hardware page doesn't explain one thing to me: When I turn off the engine and open a door, the radio will shut off. But I can still turn it on again with the power button. So the "open door event" does not actually turn off power to the HU, just tell it to shut down. Does anyone know how that is done?
    Mmmh, a bit off topic but good question... first, a few things are clear :
    - the 12V (pin 4 of the power connector) is constant and always powered. If you unplug it, you take the risk that the HU asks for the secret code when you power it again
    - on Renault cars with a hands-free card, opening the door when the engine is OFF is the same as turning the key from "accessory" ("contact" in french) to off position with a standard key (lights go off, cigare-lighter sockets are powered off, etc).

    So I'm not 100% sure of my answer, but I'd say when you open the door, the +ACC (pin 7 of the power connector) goes from 12V to 0V, and that's just a signal that triggers the radio off. However, if you press the power button of the radio, it just starts again. No big deal...


    Vicne

  6. #696
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    avoid power off after 10 minutes

    When I turn off the engine of my car, the radio power itself down in 10 minutes to avoid battery discharging ...

    The problem is that the +12Vsw signal remains high(to 12V) only for 10minutes and then it goes down to 0V

    I think there would be 2 solutions to avoid this:

    1. Short circuit +12Vsw with +12Vpermanent ... but I don't know if this can damage my car

    2. Cut off the +12Vsw cable and split the +12Vpermanent cable to link it with both 12sw and 12permanent pins on the radio power connector. I think this should be the best solution but, in this case, I don't know if the halving of the current can damage my radio.

    What do you think??

    Thanks very much,
    Giovanni.

  7. #697
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    Quote Originally Posted by s4uzer View Post
    When I turn off the engine of my car, the radio power itself down in 10 minutes to avoid battery discharging ...

    The problem is that the +12Vsw signal remains high(to 12V) only for 10minutes and then it goes down to 0V
    True. I forgot that detail. After a certain time, everything is powered down except the bare minimum (12v permanent to the radio, door buttons, etc).
    I guess what you call +12Vsw is pin 5 (+12V Aerial), right ?

    I think there would be 2 solutions to avoid this:

    1. Short circuit +12Vsw with +12Vpermanent ... but I don't know if this can damage my car

    2. Cut off the +12Vsw cable and split the +12Vpermanent cable to link it with both 12sw and 12permanent pins on the radio power connector. I think this should be the best solution but, in this case, I don't know if the halving of the current can damage my radio.

    What do you think??
    The shortcut at the HU level clearly is a bad idea, because via this shortcut, all the lights and such would still be powered by the 12v permanent of the radio, which is probably not suited for such a load (it most probably is fused differently)

    The second solution looks cleaner to me because *only* the radio would still be powered after the timeout, while all the rest would shut down. However, you should verify first that the 12v permanent is sized to power the HU (check the fuse rating).

    There's absolutely no "halving of the current" involved : the voltage would be the same on both pins and each one would draw the current it needs, which simply means the 12v permanent must support the sum of these 2 currents. That's what I mean above.

    Nevertheless, in my opinion, the security timeout is there for a reason and I wouldn't bypass it without a real need... Take care that if you drawn your battery on modern vehicules, you'll be in big trouble...

    Just my 2 cents ;-)

  8. #698
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    Quote Originally Posted by Vicne View Post
    I guess what you call +12Vsw is pin 5 (+12V Aerial), right ?
    Yes, i meant +12V Aerial

    Quote Originally Posted by Vicne View Post
    The shortcut at the HU level clearly is a bad idea, because via this shortcut, all the lights and such would still be powered by the 12v permanent of the radio, which is probably not suited for such a load (it most probably is fused differently)
    Than I will try this solution, thanks very much

  9. #699
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    Quote Originally Posted by s4uzer View Post
    Quote Originally Posted by vicne
    The shortcut at the HU level clearly is a bad idea
    Than I will try this solution, thanks very much
    Err... I guess you mean you will try the *other* solution, right ? :-)

  10. #700
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    Quote Originally Posted by Vicne View Post
    Err... I guess you mean you will try the *other* solution, right ? :-)
    ooopppsssss ... sorry, i guess that :-)

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