Vehicle CAN Diagnosis

CAN communication status and error counter is displayed.
The error counter displays "OK" if any malfunction was not detected in the past and displays "0" if a malfunction is detected. It increases by 1 if the condition is normal at the next ignition switch ON cycle. The upper limit of the counter is 39.
The error counter is erased if "Reset" is pressed.

Fig 1: Identifying Vehicle CAN Diagnosis System Diagnostic Menu Screen
Courtesy of NISSAN NORTH AMERICA, INC.