MULTIPLEX COMMUNICATION


  1. GENERAL


    1. The Controller Area Network (CAN) is a serial data communication network for real time application. It is a multiplex communication network equipped in a vehicle, and has communication speeds of 500 kbps (HS-CAN) and 250 kbps (MS-CAN), and the ability to detect malfunctions.

    2. The HS-CAN consists of the Bus 2, Bus 3, Bus 5, V bus, Sub Bus 15 and local bus.

    3. The MS-CAN consists of the Sub Bus 1.

    4. The central gateway ECU has a gateway function and is used to transmit data between the Bus 2, Bus 3, Bus 5 and V bus.

    5. The main body ECU (multiplex network body ECU) has a gateway function and is used to transmit data between the Bus 2 and Sub Bus 1.

    6. The CAN has 2 terminating resistors which are necessary for accurate judgment of communication on the main bus.

    7. The communication wire used is a twisted-pair wire. The bus line has a high line (2.5 V to 3.5 V of voltage is applied) and a low line (1.5 V to 2.5 V of voltage is applied).

  2. SYSTEM DIAGRAM

    Figure 1. Bus 5

    A01W7FDE03

    Figure 2. Bus 3 for LHD

    A01W7TAE01

    Figure 3. Bus 3 for RHD

    A01W7KQE01

    Figure 4. V Bus

    A01W7UNE01
    *1 Central Gateway ECU
    *2 to/from Bus 5/Bus 3/Bus 2

    Figure 5. Bus 2 for LHD 1

    A01W7M3E01

    Figure 6. Bus 2 for LHD 2

    A01W7LOE01

    Figure 7. Bus 2 for RHD 1

    A01W73ZE01

    Figure 8. Bus 2 for RHD 2

    A01W7PFE01

    Figure 9. Sub Bus 15(Models with 3UR-FE Engine)

    A01W7WBE01
    *1 Transmission Control Computer Assembly
    *2 to/from Bus 2

    Figure 10. Sub Bus 1 for LHD

    A01W7HXE01

    Figure 11. Sub Bus 1 for RHD

    A01W7B7E01

    Figure 12. Local Bus 1

    A01W7PYE01

    Figure 13. Local Bus 2

    A01W7K2E01

    Figure 14. Local Bus 3

    A01W74DE01

    Figure 15. Local Bus 4

    A01W7ETE02

    Figure 16. Local Bus 5 (Models without AHS)

    A01W7YCE01
    *1 Headlight Main Computer Sub-assembly
    *2 Headlight Sub Computer Sub-assembly
    *3 to/from Bus 2

  3. LAYOUT OF MAIN COMPONENTS

    A01W7TQC02
    *A Models without Pre-crash Safety System *B Models with Pre-crash Safety System
    *C Models with Forward Recognition Camera *D Models with Blind Spot Monitor System
    *E Models with Electrical Key and TPMS Receiver Assembly -
    *1 Headlight Sub Computer Sub-assembly *2 Inner Rear View Mirror Assembly
    *3 Millimeter Wave Radar Sensor Assembly *4 Front Television Camera Assembly
    *5 ECM *6 Headlight Main Computer Sub-assembly
    *7 Outer Mirror Control ECU Assembly RH *8 Skid Control ECU
    *9 Outer Mirror Control ECU Assembly LH *10 Outer Rear View Mirror Assembly LH
    *11 Forward Recognition Camera *12 Outer Rear View Mirror Assembly RH
    *13 Parking Brake ECU Assembly *14 Suspension Control ECU
    *15 Blind Spot Monitor Sensor LH *16 Rear View Camera (Television Camera with Dynamic Guide Line Assembly)
    *17 Electrical Key and TPMS Receiver Assembly *18 Blind Spot Monitor Sensor RH
    *19 No. 2 Multiplex Network Body ECU *20 Power Back Door Unit Assembly
    A01W7X7C01
    *A Models with Pre-crash Safety System *B Models with Headup Display
    *1 Driving Support Computer Assembly *2 Meter Mirror Sub-assembly
    *3 Smart Key ECU Assembly *4 Airbag Sensor Assembly
    *5 Air Conditioning Amplifier Assembly *6 Central Gateway ECU
    *7 4 Wheel Drive Control ECU - -
    *a Refer to the Service Bulletin for the installation position of the part. - -
    A01W7N6C02
    *A Models with G-BOOK System *B Models with 3UR-FE Engine
    *1 Accessory Meter Assembly *2 Steering Sensor
    *3 Main Body ECU (Multiplex Network Body ECU) *4 DLC3
    *5 Multi-media Module Receiver Assembly *6 DCM (Telematics Transceiver)
    *7 Remote Operation Controller Assembly *8 Transmission Control Computer Assembly
    A01W793C02
    *1 Combination Meter Assembly *2 Steering Control ECU
    *3 Multiplex Tilt and Telescopic ECU *4 Front Power Seat Switch LH
    *5 Parking Assist ECU *6 Clearance Warning ECU Assembly
    *7 Power Steering ECU Assembly *8 Clock Assembly

  4. DIAGNOSIS


    1. If a malfunction occurs on the CAN communication line, the ECU that is connected to the CAN communication line stores the DTC (Diagnostic Trouble Code) in its memory.

    2. For details, refer to the Repair Manual