How to solve if Lonsdor K518ISE can’t be connected to anysupported car models

Is it very possible because the OBD cable, or little chance due to the device.
OBD test cable testing method:
Step 1: Unplug the K518ISE main unit and turn it off
Step 2: Connect the 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

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:

Pic 3: 16 pins on the vehicle OBD connector
PIN 1 and 8 should have no resistance; PIN2,3,4,5,6,7,9,10,11,12,13,14,15,16
should have resistance.
If all have no resistance, then it will be obd cable has problem; if the
measurement is all as it supposed to be, and the car models(those K518ISE supported models) still can’t be connected, then you will need to send back the DB25 cable and the main unit for service to check. .

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