U0140
U0140 CAN COMM CircuitDescription
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.
On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.
U0140:
Diagnosis Procedure
Go to [LAN System: Basic Inspection]. Information Needed For Trouble Diagnosis
DTC Confirmation Procedure
1. Turn ignition switch ON and wait at least 3 seconds.
2. Check DTC.
3. If DTC is detected, go to [U0140 CAN COMM Circuit].