CAN Communication System

NETWORKING: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU

NOTICE:
* Turn the engine switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
* Turn the engine switch off before inspecting CAN bus wires for a ground short.
* After the engine switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
* Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
* This section describes the standard CAN values for all CAN related components.

HINT
* Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
* Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

1. CAN No. 1 J/C

(a) Check the CAN No. 1 junction connector.

(1) Connection diagram





Text in Illustration





(b) Check the connection diagram of the components which are connected to the CAN No. 1 junction connector.





2. CAN No. 2 J/C

(a) Check the CAN No. 2 junction connector.

(1) Connection diagram





Text in Illustration





(b) Check the connection diagram of the components which are connected to the CAN No. 2 junction connector.





3. CAN No. 3 J/C

(a) Check the CAN No. 3 junction connector.

(1) Connection diagram





Text in Illustration





(b) Check the connection diagram of the components which are connected to the CAN No. 3 junction connector.





4. DLC3

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





Standard Resistance:





Text in Illustration





5. ECM

(a) Disconnect the ECM connector.





Text in Illustration





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

Standard Resistance:





6. SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

(a) Disconnect the brake actuator assembly connector.





Text in Illustration





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

Standard Resistance:





7. STEERING ANGLE SENSOR

(a) Disconnect the steering angle sensor connector.





Text in Illustration





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

Standard Resistance:





8. YAW RATE SENSOR

(a) Disconnect the yaw rate sensor connector.





Text in Illustration





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

Standard Resistance:





9. POWER STEERING ECU

(a) Disconnect the power steering ECU connector.





Text in Illustration





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

Standard Resistance:





10. CENTER AIRBAG SENSOR

(a) Disconnect the center airbag sensor connector.





Text in Illustration





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

Standard Resistance:





11. GATEWAY ECU

(a) Disconnect the gateway ECU connector.





Text in Illustration





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

Standard Resistance:





12. DISTANCE CONTROL ECU (w/ Dynamic Radar Cruise Control System)

(a) Disconnect the distance control ECU connector.





Text in Illustration





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

Standard Resistance:





13. SEAT BELT CONTROL ECU (w/ Pre-collision System)

(a) Disconnect the seat belt control ECU connector.





Text in Illustration





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

Standard Resistance:





14. NAVIGATION ECU (DISPLAY AND NAVIGATION MODULE DISPLAY) (w/ HDD Navigation System)





(a) Disconnect the display and navigation module display (Navigation ECU) connector.





Text in Illustration





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

Standard Resistance:





15. NAVIGATION ECU (DISPLAY AND NAVIGATION MODULE DISPLAY) (w/ DVD Navigation System)





(a) Disconnect the display and navigation module display (Navigation ECU) connector.





Text in Illustration





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

Standard Resistance: