Another way of identifying what the cause or the no linking could be is by testing pin to pin check with a wiring schematic while utilizing a voltmeter to inspect every single wire. Nissan Data Scan has an adapter and display app, however the display looks about as old as the protocols they are using.
Note: Some vehicles may use K line for diagnostics of engine ECU (ECM) but still use DDL1 line for diagnostics of other control modules. The latest software release supports diagnostics of following control modules: ECM, BCM, TCM, ABS, SRS and ECMD (ECM Diesel) over the K line (DDL2). Aftermarket ECUs like Apexi Power FC or F-Con V Pro are not compatible with the software. But identifying this is very difficult as a result of the data transferred between the two controllers. The Nissan DataScan II software supports factory Nissan ECUs.
In addition, one of the computers might be the problem. Get it replaced so that you can detect the error codes and allow them to be displayed. If there is a bad fuse, you will continue receiving the error when you link the obd2 to the computer. Afterward try checking the fuses and see if they are working fine.
Step 3 With the VCM Editor open, click on the Help tab and choose to Resync Device which will update the device before you can read. The VCM Scanner can be used for logging and code clearing later. Test it with another car and see if it functions, if it doesn’t, then probably, the issue is not with the scan tool. Step 2 Connect the MPVI2 to your OBDII port and launch the VCM Editor software. First and foremost, you should inspect whether the code reader is compatible with your vehicle or not. In most cases, these issues can be rectified and amended to allow you to read the error codes.