Mazda CX‌-30 Forum banner

41 - 50 of 50 Posts

·
Registered
Joined
·
20 Posts
Thanks the first one looks like what I need for 12v Escort radar. Can you confirm that the it's ODB2 port that is "switched"... goes on and off with the engine or is it the adapter that accomplishes this? The description says "Perfect for installing Dash Cams, Radar detectors or any other permanent 12v Accessory" that is throwing me off. Thanks again.
Yes - the power to the ODB2 port is available only when the engine is running.
 

·
Registered
2020 Cx-30 Select Package
Joined
·
31 Posts
Discussion Starter #42 (Edited)
I ended up buying a Valentine One with the OBD2 power adapter. Thanks for the tip! It was time for me to upgrade anyway, and since Valentine just came out with their Gen2 detector I was able to get a deal on a used but up to date first generation model.

From what I've gathered, primarily looking at the descriptions of the two Amazon adapters, I think the OBD2 port actually is always powered on. The first 12v adapter says so in the description, and the second dashcam adapter has a physical switch you can toggle from "always on" to "acc mode".
 

·
Registered
Joined
·
20 Posts
I ended up buying a Valentine One with the OBD2 power adapter. Thanks for the tip! It was time for me to upgrade anyway, and since Valentine just came out with their Gen2 detector I was able to get a deal on a used but up to date first generation model.

From what I've gathered, primarily looking at the descriptions of the two Amazon adapters, I think the OBD2 port actually is always powered on. The first 12v adapter says so in the description, and the second dashcam adapter has a physical switch you can toggle from "always on" to "acc mode".
hmm... I have used the V1's ODB2 port adapter in 5-6 cars. Only when I start the car does the ODB2 port power up the V1. When I shut the engine off, the V1 looses power. If I turn on ACC mode, the ODB2 port has no power, so the V1 does not turn on.
 

·
Registered
2020 Cx-30 Select Package
Joined
·
31 Posts
Discussion Starter #44
...when I start the car does the ODB2 port power up the V1. When I shut the engine off, the V1 looses power...
I got my V1 installed and that is exactly how mine is working, so I am set. Thanks again for posting.

What I'm guessing (without a shred of evidence!) is that it's the Valentine adapter that is recognizing if the car is running or not and powering the detector on and off. After all, it can read the car's speed from the OBD2 port.

Again, I'm good, but someone who wants their cam or detector to turn off with the vehicle might want to make sure the adapter they buy works that way also. Here's where the port is for anyone who is going give it a try:

379
 

·
Registered
Mazda CX-30 GT
Joined
·
12 Posts
Checked today with multi-meter - different pins on ODB have different voltages when ON (not AAC though), and they come on when turn the engine ON, later some loose power when you lock the car and come back on not on unlock but when you start the engine again.
Also checked all fuses and figured out that they all are always on even after you lock the car and 2 minutes have passed, so unfortunately no fuses turn off even after 2 minutes.
I can confirm though that USB ports go off after 2 minutes when you lock the car but 12v socket stays hot forever.
 

·
Registered
Joined
·
20 Posts
Checked today with multi-meter - different pins on ODB have different voltages when ON (not AAC though), and they come on when turn the engine ON, later some loose power when you lock the car and come back on not on unlock but when you start the engine again.
Also checked all fuses and figured out that they all are always on even after you lock the car and 2 minutes have passed, so unfortunately no fuses turn off even after 2 minutes.
I can confirm though that USB ports go off after 2 minutes when you lock the car but 12v socket stays hot forever.
The ODB2 port is the best/easiest power option (with an adapter) unless you have a dashcam that you want to use when the engine is off - then you have to use a fuse. I use the ODB2 port for my radar detector.
 

·
Registered
Mazda CX-30 GT
Joined
·
12 Posts
Agree, I would be satisfied if it turns on and off with engine, so ordered this OBD2 adapter (UPDATE: do not buy this, it damaged my GPS and did not power up camera) in Canada and will try it tomorrow, not sure which pins it will use though. As I said earlier, I tested my OBD2 and different pins are powered on differently and with different voltages, I hope the adapter will match my port. For now I just plug it into USB temporarily.
 

·
Registered
Mazda CX-30 GT
Joined
·
12 Posts
Agree, I would be satisfied if it turns on and off with engine, so ordered this OBD2 adapter (UPDATE: do not buy this, it damaged my GPS and did not power up camera) in Canada and will try it tomorrow, not sure which pins it will use though. As I said earlier, I tested my OBD2 and different pins are powered on differently and with different voltages, I hope the adapter will match my port. For now I just plug it into USB temporarily.
Addition to my previous post guys. Be careful with those OBD2 things, the one I bought says its output is 5v 2A which seems ok for usb, but it did not power up my dashcam and what is worse after plugging it in to GPS module of Viofo a129 it looks like I have no mode working GPS :(

I am afraid to try mode OBD-ish things not to damage the car by accident, so will pass the usb power cable below driver's seat and inside the middle glovebox and power from native usb port which will turn off after ~2min when I lock the car for sure and not drain my battery. What is more if i want it to stay ON for some reason i can plug it to cigarette port next to it.

An important note: when you put your wires, keep in mind that in CX-30 the airbags are all along the A pillar and roof, so you need to be careful not to cross the airbag over with the cable!!! Pass the cable along the A pillar between the windshield, so you are sure its behind the airbag to the bottom of A pillar where airbag ends (it ends by the vents on pillar), then make it though the floor.
 

·
Registered
Mazda CX-30 GT
Joined
·
12 Posts
What I'm guessing (without a shred of evidence!) is that it's the Valentine adapter that is recognizing if the car is running or not and powering the detector on and off.
Based on description of those OBD adapters I would guess that they have timer and voltage meters (both can fail and i've read cases), though there are pins on OBD that are deactivated on power off, they are 8v on cx-30 and the one that is 12v is always on. So its hard to say, but I personally am off this unknown-producer devices for the reasons you've read in my previous posts, just afraid to experiment :)
 

·
Registered
2020 Cx-30 Select Package
Joined
·
31 Posts
Discussion Starter #50
It looks like the adapter you bought was designed for diagnostic tools maybe it sent a crazy message to your cam. The other Amazon adapters linked earlier in the thread seem specific to power radar/dashcam devices... hopefully their makers know what they are doing and connecting to the right obd pins to provide safe power but I too would be wary.

I am comfortable with the Valentine adapter based on their reputation. Not sure if it is tapping into the right pins or has some internal logic but it's working as advertised.

Sorry about your bad luck. Thanks for the warning... and good advice re: A pillar/ Airbags.
 
41 - 50 of 50 Posts
Top