Using the Hilux Radio A/V
The A/V can be used pretty easily. You can connect the kids DVD player to it, another camera, dashcam, or you can connect a smartphone mirroring device to allow complete mirroring of your phone for things like better navigation apps. This allows a passenger to have some better use of the multimedia system.
My first suggestion is to keep it simple first, test the A/V input with a DVD player, or video camera that has A/V RCA connectors to make sure you get the image and sound. The radio by default can only render a PAL or NTSC input, so your device that you connect needs to be either, but you can change from one to the other in the setup menu.
As per the Toyota Nav and Mutimedia Manual on page 61, you need a cable. The trick here is that any cable I test has the Video (Yellow) and R/H Audio (Red) flipped compared to how Toyota have it. Simply the Red connector becomes the Video and the Yellow connector becomes the R/H Audio. Cable from Jaycar https://www.jaycar.com.au/lead-a-v-plg- ... m/p/WV7345
From factory, you can only view the input whilst the park brake is on AND you are not moving. If any of these conditions aren’t met, then the A/V will drop out. The lockout can be tricked. You can choose whether you want to do this or not, so the standard “I am not responsible for anything” clause and “obey all road rules” applies, this is merely a suggestion and your own choice to try this suggestion.
The radio has a park brake input and a speed input. Telling the radio that the park brake is always on and that it never sees a speed will allow the A/V to be used anytime.
When using the A/V as an input for say a phone to use a navigation app, you can’t then listen to the car radio at the same time, if you want radio or music your passenger will need to launch a radio or music app from your phone.
Possible ramifications of this modification:
Speed – the automatic sound leveliser (ASL) function may not work and maybe navigation system degradation, especially when there is no GPS signal like when going through a tunnel, its possible that it wont keep plotting your position because it has lost its speed reference.
Park Brake – unsure, but it only seems linked to the A/V lockout.
(People put complete new head units in that surely don’t link back to every Toyota wire etc, so again it’s a matter of choice).
Radio Wiring Modification *Suggestion*
1 Remove radio. Watch this video https://youtu.be/6PcPsEG1Spc . I didn’t create the video, credit goes to https://www.youtube.com/user/CarbonCarSystems . It takes about 5 minutes to do it.
2 Locate and disconnect plug G37.
3 Pin 15 a Green wire needs to be cut far enough back from the connector to allow you to splice it to the White/Black (ground) wire at Pin 6. Tape the cut wire that is still in the harness, this doesn’t get used. This Green wire spliced to the ground now tells the radio that the park brake is always on .
4 Pin 17 a Purple wire needs to be cut, or remove the terminal from the housing. Either way tape the end(s). This is the speed input which now doesn’t reach the radio .
5 Plug G37 back in, put all the crap back together and test it out for yourself. If you're not happy, then put it back to standard.
It does not bypass the lockout for the inbuilt Toyota navigation, from what I understand the navigation system uses the GPS speed to determine whether you are moving or not. So you still need to be stopped to enter a navigation address which is the safe thing to do.
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