General Information: Structure

Fig 1: Controller Area Network (CAN) Structure

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 kiloohms is used for the non-dominant ECU.
  NOTE:

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

CAN-B 

• Wireless control module (WCM) < vehicles without KOS >
• KOS-ECU < vehicles with KOS >
• SRS-ECU
• Occupant classification-ECU
• A/C-ECU
• Radio and CD player or CD changer < vehicles without Mitsubishi Multi-Communication System (MMCS) >
• CAN box unit < vehicles with Mitsubishi Multi-Communication System (MMCS) >
• Hands free module < vehicles with hands-free system >
• Satellite radio tuner < vehicles with satellite radio >
• Combination meter

CAN-C 

• ASC-ECU
• TC-SST-ECU < TC-SST >
• Shift lever < TC-SST >
• S-AWC-ECU
• Steering wheel sensor
• Engine control module (ECM)

Diagnosis CAN-C 

• Data link connector