U1000 - Invalid or Missing Data for Primary Id
- Controller Area Network (CAN) communication harness is open or shorted
- Faulty Engine Control Module (ECM)
- Poor harness ground connection.
When is the code detected?
- Engine Light ON (or Service Engine Soon Warning Light)
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.