CAN Communication System

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU

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
(a) CAN J/C connectors.
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.





Wiring color





Wiring color









(b) The terminals of the CAN J/C connectors.










(c) Measure the resistance.
Standard resistance:






(d) Wiring diagram for identifying CAN J/C connectors.









2. DLC3
(a) Turn the ignition switch OFF.
(b) Measure the resistance.










3. SKID CONTROL ECU
(a) Turn the ignition switch OFF.
(b) Disconnect the A4 skid control ECU connector.
(c) Measure the resistance.










4. ECM
(a) Turn the ignition switch OFF.
(b) Disconnect the B1, E46 and E47 ECM connectors.
(c) Measure the resistance.










5. YAW RATE SENSOR
(a) Turn the ignition switch OFF.
(b) Disconnect the E34 yaw rate sensor connector.
(c) Measure the resistance.










6. STEERING ANGLE SENSOR
(a) Turn the ignition switch OFF.
(b) Disconnect the E16 steering angle sensor connector.
(c) Measure the resistance.