Contents
Does ignition need to be on for obd2?
Always turn the ignition on or have the car running according to the instructions in the manual. Failure to do this might corrupt the scanning software. It’s also very important that you drive around with the manual for the specific scanner model that you’re using.
Does obd2 port have constant power?
The Constant Power Cable will plug into a vehicle’s OBD-II port to provide constant power to compatible Garmin Dash Cams. This will provide power to the Garmin Dash Cam even when the vehicle is parked and turned off. See the image below for an example of what the OBD-II port looks like.
Is the OBD II active when the key is not in lock?
As far as I know the OBD II voltage is active even when the key is in lock. Can anyone confirm this? edit : It’s for a product that will be powered from the OBD II connector. Pin 16 on the ODB-II connector is specified as “Battery Power” or “Battery Positive”. There will always be 12v power between pin 4 and 16.
What to do if the OBD II scanner doesn’t communicate with?
With the Ignition on, the voltage on class 2 serial data pin should be 5V or fluctuating between 3.5V and 5.0V, If open, PCM cannot transmit data to the scan tool. Connect positive DMM lead to DLC Battery + terminal Connect negative DMM lead to battery ground terminal.
What’s the power between pin 4 and 16 on an OBD II?
Pin 16 on the ODB-II connector is specified as “Battery Power” or “Battery Positive”. There will always be 12v power between pin 4 and 16.
Can a car have power when the key is not in ignition?
However, this is only power and you won’t be able to communicate with the car. The car’s computers will not have constant power and are typically only active when the key is turned to the ON position. Some cars may power up certain CAN components or even the ECU in the ACC key position, but I’ve never seen that happen (limited experience).