How to Test Lonsdor K518 OBD or DB25 Adapter?

When Lonsdor K518ISE/K518S can’t be connected to any supported car models, you have to test the OBD or DB25 adapter.
Is it very possible because the OBD cable, or little chance due to the device.


Lonsdor OBD-BD25 test cable test:
Step 1: Unplug the K518ISE main unit and turn it off
Step 2: Connect the DB25 cable (OBD cable) to k518ISE main unit, using a multimeter and switch to the diode stalls
Pay attention that there are 3 connectors on the OBD cable:
Connector 1: connect K518ISE OBD port;
Connector 2: connect KPROG adaptor
Connector 3: connect the vehicle OBD port


Pic 1: 3 connectors on OBD cable


Step 3: Use the red pen to touch the metal part(as shown in pic 2 in red)


Pic 2: Metal part on K518ISE OBD port


Step 4: Use the black pen to test the resistance of each pin of the vehicle connector (As shown in pic 3) , make sure that you hold the vehicle connector in the way just as the pic shows:


PIN 1 and 8 should have no resistance; PIN2,3,4,5,6,7,9,10,11,12,13,14,15,16should have resistance.
If all have no resistance, then it will be DB25 cable has problem; if the measurement is all as it is supposed to be, and the car models (those K518ISE supported models) still can’t be connected, then you will need to sent back the DB25 cable and the main unit for Lonsdor to check (if so, contact your dealer).



See also:

Lonsdor K518ISE OBD to DB25 Cable Pinout