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Old 09-19-2019, 07:24 AM #196
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Originally Posted by pointman View Post
Old thread, but wanted to clarify that is not the case on my 19. I have something plugged it and it powers down each time with ignition.
The OBDII port is powered even when the car is off - it just most likely can't read the ECU. The ECU might not be accessible until the ignition is in the accessories on position or engine on position. Some newer cars will have ECU read mode when car is off - I don't believe the 4R is this case. What ever you are plugging in might need the ECU to be in read mode to stay on.
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Old 09-21-2019, 01:50 AM #197
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Originally Posted by SlickTRD View Post
The OBDII port is powered even when the car is off - it just most likely can't read the ECU. The ECU might not be accessible until the ignition is in the accessories on position or engine on position. Some newer cars will have ECU read mode when car is off - I don't believe the 4R is this case. What ever you are plugging in might need the ECU to be in read mode to stay on.
Interesting, thank you. One prime example is the Valentine One's ODB power port used to power their radar detectors. It works perfectly, and once the vehicle is turned off it will shut the radar off after a few seconds as well.
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