U1000 CAN COMM CIRCUIT

Description
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicles are equipped with many electronic control units, 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.
CAN Communication Signal Chart. Refer to See: Powertrain Management\Computers and Control Systems\Information Bus\Application and ID\CAN Communication Signal Chart.

DTC Logic

DTC DETECTION LOGIC

1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check "Self Diagnostic Result". Is "CAN COMM CIRCUIT" displayed?

YES >> Refer to See: Powertrain Management\Computers and Control Systems\Information Bus\Description and Operation\CAN Communication System\CAN Communication Control Circuit.
NO >> Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.