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What happend if the OBD2 unpluged?

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  • What happend if the OBD2 unpluged?

    Hello,
    i'm new to the forum and I'm from Germany, so excuse my bad English. I drive a Skoda Octavia MK3 RS Gen. 3 EA888 with 220 hp and want to install my new JB4 with Bluetooth. The state specifies that a technical inspection (TÜV) must be carried out every 2 years. The exhaust gas values ​​are also read out and checked via OBD2. The errors are also read out via OBD2 during the regular inspection at the specialist dealer. What happens if I unplug the OBD2 connector with JB4 installed. If the vehicle is shut down. Does it work normally like MAP0 or do you have to remove the complete JB4 before the inspection?​

  • #2
    Originally posted by Subwoofer1983 View Post
    Hello,
    i'm new to the forum and I'm from Germany, so excuse my bad English. I drive a Skoda Octavia MK3 RS Gen. 3 EA888 with 220 hp and want to install my new JB4 with Bluetooth. The state specifies that a technical inspection (TÜV) must be carried out every 2 years. The exhaust gas values ​​are also read out and checked via OBD2. The errors are also read out via OBD2 during the regular inspection at the specialist dealer. What happens if I unplug the OBD2 connector with JB4 installed. If the vehicle is shut down. Does it work normally like MAP0 or do you have to remove the complete JB4 before the inspection?​
    On this model without the OBD signal the JB4 will be dormant so you can unplug and do the inspection and then plug it back in again. Fine to drive without it in as well.
    2014 VW Golf 7 R
    2019 Porsche Cayenne Turbo
    2021 VW Golf 8 R

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    • #3
      Originally posted by George @ BMS View Post

      On this model without the OBD signal the JB4 will be dormant so you can unplug and do the inspection and then plug it back in again. Fine to drive without it in as well.
      Okay, thank you for the quick answer. So all cables can remain connected?
      Do I have to activate a specific map before I pull the OBD2 connector?
      In other forums you can read that the JB4 then runs on MAP1 by default.​

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      • #4
        Originally posted by Subwoofer1983 View Post

        Okay, thank you for the quick answer. So all cables can remain connected?
        Do I have to activate a specific map before I pull the OBD2 connector?
        In other forums you can read that the JB4 then runs on MAP1 by default.​
        The rest of the cables can remain connected
        On this model on a 60/88/5 firmware the JB4 wont do anything and remain dormant regardless of map selected.
        2014 VW Golf 7 R
        2019 Porsche Cayenne Turbo
        2021 VW Golf 8 R

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        • #5
          Perfect, it would be a problem if the specified emission values ​​are no longer achieved because Map1 is preset. Then I'll lose my license to operate.

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