U1001 INFINITI – Invalid or Missing Data for Primary Id

U1001 INFINITI Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

U1001 INFINITI Possible Causes

Harness or connectors (CAN communication line is open or shorted),ECM

U1001 INFINITI Description

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.