General Information: Structure: Notes

Fig 1: ETACS-ECU Communication Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

• A gateway function has been integrated to ETACS-ECU as the network central ECU.
• The CAN system consists of the following three networks: CAN-B (middle-speed body network), CAN-C (high-speed power train network), and the diagnosis CAN-C (diagnosis exclusive network). Each ECU is connected to one of the networks depending on its functions.
• The CAN bus line consists of two lines, CAN_L and CAN_H (CAN Low and CAN High, respectively), as well as two terminal resistors (A twisted-pair cable, highly resistant to noise, is used for the communications line).
• The CAN bus line connecting two dominant ECUs is the main bus line, and the CAN bus line connecting each ECU is the sub-bus line.
• With CAN-C, the terminal resistors are incorporated in ECU. Resistors with approximately 120 ohms is used for the dominant ECU, and that with 3.0 kΩ is used for the non-dominant ECU.
  NOTE:

  • Dominant ECU: ETACS-ECU and engine control module
  • Non-dominant ECU: ECU and sensor on CAN-C network, excluding ETACS-ECU and engine control module
• To the CAN bus line, ECU, sensor, and data link connector are connected as follows for each network.

CAN-B 

• WCM <vehicles without KOS>
• KOS-ECU <vehicles with KOS>
• OSS-ECU <vehicles with KOS>
• SRS-ECU
• Occupant classification-ECU
• A/C control panel
• Combination meter

CAN-C 

• Steering wheel sensor
• ASC-ECU
• AWD-ECU <AWD>
• Engine control module (ECM)
• Electric power steering-ECU (EPS-ECU)
• Transaxle control module (TCM) <CVT>
• FCM/LDW/AHB-ECU <vehicles with FCM>
• Gateway-ECU <vehicles with smartphone link display audio>
• Smartphone link display audio <vehicles with smartphone link display audio>