Control Unit (CAN)

U1010 CONTROL UNIT (CAN)

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

U1010:

DTC CONFIRMATION PROCEDURE

NOTE: If "DTC CONFIRMATION PROCEDURE" has been previously performed, always turn ignition switch OFF. Then wait at least 10 seconds before performing the next test.

1.CHECK DTC DETECTION

With CONSULT-III
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 "U1010 CONTROL UNIT (CAN)" detected?
YES >> Go to "Diagnosis Procedure" below.
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident". Service Information For Electrical 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 "U1010 CONTROL UNIT (CAN)" indicated?
YES >> Go to LAN section. Refer to LAN-25, "CAN System Specification Chart". CAN System Specification Chart
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident". Service Information For Electrical Incident