5AT: RE5R05A

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 independently).

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.

DTC Logic

U1000:

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. Start the engine.
2. Run engine for at least 6 consecutive seconds at idle speed.
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".
NO >> Check intermittent incident. Refer to GI-38, "Intermittent Incident". Service Information For Electrical Incident

Diagnosis Procedure

1.CHECK CAN COMMUNICATION CIRCUIT

With CONSULT-III
1. Start the engine.
2. Perform "SELF-DIAG RESULTS" mode for "TRANSMISSION".
Is "U1000 CAN COMM CIRCUIT" detected?
YES >> Go to LAN section. Refer to LAN-16, "Trouble Diagnosis Flow Chart". Diagnosis and Repair Workflow
NO >> Check intermittent incident. Refer to GI-38, "Intermittent Incident". Service Information For Electrical Incident