OBD II, no ignition triggered wire?

[Vortex Radar]

Yesterday I installed a Vueroid S1 4K 2CH into a rental car and this time around I used an OBD hardwire instead of the usual dashcam battery pack.

It works, but the results are inconsistent with how long it takes for the dashcam to switch to parking mode when the engine shuts off. Could be 30 sec. Could be 3-4 min.

Chatting with some fellow dashcammers (is that the term, haha) yesterday, it sounds like the OBD II connector doesn't actually have an ignition trigger pin to tell the dashcam when to switch between driving and parking mode, and so the OBD adapters are doing their best to guess when to switch dashcam recording modes. I didn't realize that and always assumed there was a pin there they could rely on.

Installation is certainly easier compared to a fuse tap install, but that explains why the results are more variable.

 

[LeeShadow]

One of my previous vehicles did not have one and I could not use my existing aftermarket "parking mode" OBD2 accessory with the Blackvue cam I had back then. I think I remember reading at the time that OBD2 standards do not require an ignition switched pin.

 

[Karagandinez]

According to the source, it is not possible to create an OBD-II cable that is compatible with all car makes and includes a wire activated by the ignition.

Übersicht mit KI
In standard OBD2 connectors, Pin 16 provides permanent positive 12-volt battery power. However, for positive voltage strictly tied to the ignition (switched power), you will typically need to check the manufacturer-specific pins, as standard OBD2 layouts do not mandate an ignition pin.Depending on your specific vehicle make, the switched ignition pin is commonly found here😛in 1: Used by many manufacturers (like VW/Audi) to provide switched ignition voltage.Pin 8: Often designated for ignition by various manufacturers.Unpopulated / Empty Pins: Several pins are left to "Manufacturer Discretion" (e.g., 1, 3, 8, 9, 11, 12, 13), where the ignition voltage might be routed.

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