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CAN Communication System





CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU

NOTICE:
* Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
* After the ignition switch is turned off, check that the key reminder warning system is not in operation.
* Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
HINT
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

1. CAN JUNCTION CONNECTOR

HINT
* The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines and the connecting side of the connector.
* E62, E63, E64 and E65 are interchangeable.

















2. TERMINALS OF CONNECTORS FOR JUNCTION CONNECTOR (CAN JUNCTION CONNECTOR)













(a) Wiring diagram for identifying CAN junction connector connectors.





3. DLC3





(a) Turn the ignition switch off.

(b) Measure the resistance according to the value(s) in the table below.









4. BRAKE ACTUATOR (SKID CONTROL ECU)





(a) Turn the ignition switch off.

(b) Disconnect the A4 skid control ECU connector.

(c) Measure the resistance according to the value(s) in the table below.









5. ECM





(a) Turn the ignition switch off.

(b) Disconnect the E78, E77 and B50 ECM connectors.

(c) Measure the resistance according to the value(s) in the table below.









6. YAW RATE SENSOR





(a) Turn the ignition switch off.

(b) Disconnect the E34 yaw rate sensor connector.

(c) Measure the resistance according to the value(s) in the table below.









7. STEERING ANGLE SENSOR





(a) Turn the ignition switch off.

(b) Disconnect the E16 steering angle sensor connector.

(c) Measure the resistance according to the value(s) in the table below.








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