Monday, April 24, 2017

Toguard Backup Camera Replacement?

A year ago, I bought a Toguard 5" Android dash cam with a backup camera. Several months ago, the backup camera died. Here's a picture of the camera that came with it (from the Amazon listing):
The camera that came with the Toguard DVR mirror

I figured I'd search Amazon for a replacement camera. I found this one and thought it was the same.
Replacement backup camera
I plugged it in and . . . nothing. Then I attached the power wires on the new camera. Still nothing. So I did a quick resistance check and saw that they were not wired the same. That kind of upset me, so I took it out on the cameras - both of them. I had to take them apart and see how each was wired. So on the long-shot that somebody's looking for a wiring diagram for both of these backup cameras, here ya go.

Toguard backup camera, disassembled
The wire from the camera to the DVR mirror is a five conductor cable, with a foil shield.

Toguard backup camera plug

When checking the old camera, I found that it wasn't the camera that failed, but the cable. There were multiple breaks in the line, but nothing obvious from the outside.


As far as I can tell, here is how the original backup camera for the Toguard DVR mirror was wired to the 2.5mm four conductor plug:

Tip: Red wire labeled DC, 5.75V power
Ring: White wire labeled DM, Video (signal ground, maybe?)
Ring: Green wire labeled DP, Video (signal high, maybe?)
Sleeve: Black wire labeled GND, Ground/reverse signal
____________________________________________________________________________

The replacement camera appears to be wired as follows:

Tip: Red wire, camera power
Ring: yellow wire, video signal
Ring: +12V power and white wire to LEDs
Sleeve: Ground wire and black wire to LED ground

Comparing the two wiring diagrams, you can see that plugging this into my DVR mirror and connecting power to the new backup camera was a bad thing. That put +12V on the video input. Keep in mind that the Android tablet only runs on +5V. I think the backup camera input is now fried.

Replacement backup camera plug
Now, look at the above picture. Can you think of any reason why it would be necessary to connect +12V to any tablet device's input? That doesn't make any sense to me.

Replacement backup camera, disassembled

Replacement backup camera, showing the image sensor on the circuit board
 Although the outside and the plugs looked very similar, these two cameras were in fact, very different.


20 comments:

  1. Thanks for the wiring diagram, really useful. Have you any idea how the Toguard camera triggers the DVR to switch to the backup camera?

    I bought the Toguard dashcam and like you am trying to connect it to a different backup cam, I'd like it to automatically switch when in reverse but there's no obvious signal change on pins 2 or 3 on my oscilloscope when the reverse trigger is pulled high. It does work when connected to the DVR though.

    ReplyDelete
    Replies
    1. Did you find out? Sorry if it is 2020 :D
      Thanks

      Delete
  2. Did you ever get a reaplacement camera to work? Looking at doing the same thing. Would it be possible to pull apart the camera and get it back together working based on your experience?

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    Replies
    1. It would have been possible if I hadn't hooked up the wrong replacement. It put 12V on the input and fried the camera input on the mirror.

      Delete
    2. I bought 2 replacement cameras (with 4pin) and none of them work. I still have another one (also 4 pin) that works with the mirror, so I'm gonna, try using your diagram, to see if i cam make them work. I will update the results.

      Delete
  3. 5 pin cammera its a usb cam i use a usb cabele to connect it its realy warck tank you

    ReplyDelete
  4. Hi

    I'm I a similar situation where I want to use a different back camera flush mount, but don't seem to work as they as sold with RCA conecconn. Anyone have manage to hack this and rwgrofir non original camera? Tnx

    ReplyDelete
  5. Hi

    I'm in a similar situation where I want to use a different back camera flush mount, but don't seem to work as they are sold with RCA connector. Anyone have manage to hack this and retrofit non original camera? Tnx

    ReplyDelete
  6. DM and DP (the white and green wires) are for the guide lines and "mirror view"(Flips images left and right). Those were the 2 loops you could snip to remove guide lines and switch view. +12v for LEDs, +5v camera, and a ground/trigger. Replace you sot23 mosfets/transistors are probably fried. Markings like "1AM" or "A2HS8" or something like that with 3 leads. Also try replacing the voltage regulators sot23-6 or sot23-5 6 leads or 5 leads.

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    Replies
    1. Dear, if DM and DP are the guide lines, wich wire is video signal? Thanks!!!

      Delete
  7. Does Topguard make a suitable flush mount camera?

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  8. I believe the 12v input is for a signal from the reverse light. The unit will then show a lower portion on the camera’s image and display a red/amber/green distance grid.

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  9. The 5 Pin camera is indeed a USB Camera.

    The 'DM' label means 'D-' or 'Data minus' and 'DP' means 'D+' or 'Data plus'

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    Replies
    1. you are absolutely right. I have conected the camera to a pc and windows shows video.

      Delete
  10. Hola, tengo un dvr mirror pero no he podido conectar otra cámara de tipo componente rca, según el diagrama de 5 pines del conector macho hembra 2 pines son cvbs+ y cvbs- pero no detecta la entrada de video, he conectado la salida componente de un dvd player LG y aún así no detecta, alguien sabe dónde conseguir una cámara compatible?

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  11. https://ae01.alicdn.com/kf/HTB1meV5BWSWBuNjSsrbq6y0mVXaf/LEEWA-15m-2-5mm-TRRS-Jack-Connector-To-4Pin-Video-Extension-Cable-For-Truck-Van-Car.jpg

    https://ae01.alicdn.com/kf/HTB1zEiEtMKTBuNkSne1q6yJoXXab/LEEWA-10PCS-20m-2-5mm-TRRS-Jack-Connector-To-5Pin-Video-Extension-Cable-For-Truck-Van.jpg_q50.jpg

    if you look at these diagrams it makes sense why Provident Engineering fried the monitor

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  12. EL MISMO PROBLEMA....SE QUE DE ELTRRS PLUG DE 2.5 MM SALE UNA SEÑAL DE 5VOLTS(TAL VEZ PARA ALIMENTAR A LA CAMARA?) ES COLOR ROJO 5VDC MIDE EN VOLTIMETRO
    TAMBIEN EL SLAAVE...TIP R R SLAVE LA CUARTA CONEXION DEL PLUG PEGADO AL PLASTICO...ESE PIN ES TIERRA
    BLANCO Y VERDE SEG Y TERCER PIN MIDEN 0.6 VOLTS( ES DONDE DEBE ENTRAR LA SEÑAL DE VIDEO ??)

    ES LO QUE MEDI....TAMBIEN ESTOY CON E MISMO PROBLEMA...CASO ENCUENTRE LA SOLUCION LO ALZARE AL POST

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  13. Can 5 pin DVR reverse backup pin socket is convert into RCA reverse camera socket? By matching wirings. just like rear recordings gain from DVR when entering reverse gear can it works as a reverse camera.

    ReplyDelete