U1000 CAN COMM CIRCUIT

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 malfunction 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 and CAN-L) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

DTC DETECTION LOGIC

1. Turn ignition switch ON.
2. Start engine and wait for at least 6 seconds.
3. Perform "SELF-DIAG RESULTS" mode for "TRANSMISSION". With GST

Follow the procedure "With CONSULT-III".
Is "U1000 CAN COMM CIRCUIT" detected?
YES >> Go to Diagnosis Procedure below.
NO >> Check intermittent incident. Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.

Diagnosis Procedure
1.CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-III

1. Turn ignition switch ON and start engine.
2. Perform "SELF-DIAG RESULTS" mode for "TRANSMISSION". Is "U1000 CAN COMM CIRCUIT" indicated?

YES >> Go to LAN System. Refer to See: Powertrain Management\Computers and Control Systems\Information Bus\Application and ID\CAN System Specification Chart.
NO >> Check intermittent incident. Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.