[amidgeha]

Manufacturer Controlled DTC

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.

Cause:
Controller Area Network (CAN) communication harness is open or shorted
Faulty Engine Control Module (ECM)
Poor harness ground connection.

Symptoms:
Check engine light