Lucas LK-7900 Dash camera Want to know More about the LK750 OBDII system

[Peter Wilson]

Found this
https://www.ebay.co.uk/itm/301225727631
Its the LK-7900 OBD connector, just wondered how it works and if it will work on a Vauxhall Frontera, same angine and running system as the american pickups 3.2 V6 Same engine as the Isuzu Trooper.

Also interested in how it connects, eg into the power socket of the LK7900 or is it into an additional port. Cheers.

Peter

 

[Peter Wilson]

or thinking about this


https://www.ebay.co.uk/itm/191155017369

 

[Peter Wilson]

Just for your Information the Can bus system on my frontera is this type
SAE J1850 PWM

http://www.onboarddiagnostics.com/page03.htm
its a Can Bus system that tells me when a bulb has gone or even if my foot is not on the brake stopping me from making the car move.

 

[Chode]

I'd like to know, if this dash cam + OBD setup is compatible with Mercedes models (and which ones too) - don't see any mentioned on Lukas website ...

 

[kamkar]

No and thats the stupid thing with the lukas Dashcams and the way they connect to the OBD port, as you have proberly notised not all functions Work on all the cars listed on the lukas site.

So there isent anything other than buy it and try / pray for full coverage on all functions. ( witch is stupid in my eyes )

It should be made so you had to teach your new dashcam to undestand the signals in the OBD port, so the first time you boot your new dashcam you had to go thru a list of Things so that the dashcam could listen on all the signals on the OBD port and then figure out what corrospond to what feature.

 

[jokiin]

problem is that the ODB port is a standard connection but it's not the same protocol on all cars, would be very hard to support all vehicles I think

 

[Peter Wilson]

Your right and wrong, Not all OBD ports are wired the same way the 12 volt and earth are standard, but some cars use 3 data lines and some only use one and different ecus use different datarates and protocols especially in the older OBDII cars. OBD was ment to make communication with cars universal so any reader could read any car across the world, but VW have there own type vauxhall have theres and the same car with a different size engine may use a different connector for the same ecu controling the engine or gearbox.

 

[Chode]

Got a reply from Qrontech, not a good news, for me that is:

I, perhaps rather cheekily, suggested they implement a somewhat different strategy (unlikely as it might be):

 

[reverend]

I don't think it's quite as easy as that - RossTech for example had to reverse engineer the system VAG Group use in their cars (Audi, Bentley, Bugatti, Lamborghini, Porsche, SEAT, Škoda and Volkswagen) when they produced VAGCOM / VCDS. Ironically it's now more powerful than the system the dealer use, and it frustrates them when I take my car in and know exactly what is wrong and needs fixing. In their own words I get more insight from the ECUs than they do 🙂

I had an import Toyota Aristo a few years ago - sold as the Lexus GS in the UK and that spoke a totally different protocol - can't remember if it was VOBD or JOBD off the top of my head but it was hard work tracking something down which would work on that as it was JDM and in the end I had to buy a Blitz RVIT device which spoke that protocol to the cars ECU.

They're probably buying something like the ELM chip in these cameras which speaks certain variants of the protocol and they get the data that way - otherwise R&D would be ridiculously expensive to talk to other cars and the camera prices would shoot up.

I wish it was that simple though as it's a great function when it's available!

 

[EngineTech.]

I own the Сhevrolet Сruze, date of manufacture - 2013 year.

DVR Lukas LK-7900ARA is working properly with LK-750-OBD + LK-510-SMGPS. Screenshot attached.

 

[Chode]

I wish it was that simple though as it's a great function when it's available!

I had a suspicion, it can't be as simple as that.
It certainly is a great feature, perhaps more manufacturers will follow this trend, with more options ... 🙄

 

[Dave Draper]

I don't think it's quite as easy as that - RossTech for example had to reverse engineer the system VAG Group use in their cars (Audi, Bentley, Bugatti, Lamborghini, Porsche, SEAT, Škoda and Volkswagen) when they produced VAGCOM / VCDS. Ironically it's now more powerful than the system the dealer use, and it frustrates them when I take my car in and know exactly what is wrong and needs fixing. In their own words I get more insight from the ECUs than they do 🙂

I had an import Toyota Aristo a few years ago - sold as the Lexus GS in the UK and that spoke a totally different protocol - can't remember if it was VOBD or JOBD off the top of my head but it was hard work tracking something down which would work on that as it was JDM and in the end I had to buy a Blitz RVIT device which spoke that protocol to the cars ECU.

They're probably buying something like the ELM chip in these cameras which speaks certain variants of the protocol and they get the data that way - otherwise R&D would be ridiculously expensive to talk to other cars and the camera prices would shoot up.

I wish it was that simple though as it's a great function when it's available!

I have a Lukas dash cam but thinking of moving to the wife's car and replace with a mini 0803. I have a 2011 Jeep Grand Cherokee and like Mercedes and a few others, nobody seems to be able to get jeep specific code as the viscously protect their OBD II, so you must switch to Dodge or Chrysler, and then you only get engine codes. If you know of any OBD II readers remote or otherwise, I would live to know. The Jeep a Gran Cherokee is mostly parts from the M series Mercedes in the drivetrain, with the exception of the FIAT designed Pentastar engine. This makes working on the simplest things horrible and my wife's Honda CRV will come up on almost all OBD II readers. Anyhow thanks for the post as it has made me wonder if any OBD II stuff is out there for the Jeep SUVs. The long time members at Jeepgarage.net complain about the Jeep secrecy quite often and it's quite frustrating. I had a front left wheel sensor go bad on a long road trip and the OBD II reader was saying the engine was fine, but when read at the Orlando Jeep dealer their gear pulled up multiple problems with the sensor and an HVAC bearing system. Luckily I'm not foolish enough to own a Jeep without an additional service contract as it's paid for itself twice already. It the price you pay to be part of the Jeep cult as opposed to the very similar Dodge counterpart. For 2014+ owners much of the Mercedes parts have been changed over which actually makes the parts less expensive. I just didn't like the front end of the 2014 so I went with a 2011 model that had recently been turned in at 36K.