CAN COMMUNICATION SYSTEM, Diagnostic DTC:U1002

DTC Code DTC Name
U1002 Lost Communication with Gateway Module (MS Bus)

DESCRIPTION

  • The main body ECU (multiplex network body ECU) stores this DTC when no signals can be received from the ECUs that have been memorized as those connected to the MS bus.

  • When the main body ECU (multiplex network body ECU) receives a response signal from the ECUs connected to the MS bus, the main body ECU (multiplex network body ECU) recognizes and memorizes that the ECU is connected to the MS bus. Based on this memorized data, the main body ECU (multiplex network body ECU) monitors for malfunctions in the ECUs connected to the MS bus when communicating with those ECUs. If the main body ECU (multiplex network body ECU) cannot receive response signals from the ECUs that have been memorized as those connected to the MS bus, the main body ECU (multiplex network body ECU) determines that a malfunction exists.

  • If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (one side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U1002

Lost Communication with Gateway Module (MS Bus)

Lost communication with the gateway module (MS bus).

  • MS bus circuit

  • Main body ECU (multiplex network body ECU) main wire or connector

  • Front power seat switch LH branch wire or connector

  • Multiplex tilt and telescopic ECU branch wire or connector

  • Driving support switch control ECU branch wire or connector

  • Outer mirror control ECU assembly LH branch wire or connector

  • Outer mirror control ECU assembly RH branch wire or connector

  • Main body ECU (multiplex network body ECU)

  • Front power seat switch LH

  • Multiplex tilt and telescopic ECU

  • Driving monitor switch control ECU

  • Outer mirror control ECU assembly LH

  • Outer mirror control ECU assembly RH

  • No. 1 junction connector

  • No. 3 junction connector

  • No. 6 junction connector

Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

C221146E01

CAUTION / NOTICE / HINT

Note:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tip:

Operating the engine switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note:

      • After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work.

        Click hereClick hereClick here

      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

        Click hereClick hereClick hereClick here

      Result

      Result

      NEXT
    NEXT

  2. CHECK CAN BUS WIRE (MAIN WIRE FOR DISCONNECTION, BUS LINE FOR SHORT CIRCUIT)

    1. C216700C01

      *a

      Component with harness connected

      (No. 6 Junction Connector)

      *b

      Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      Resistance:

      Malfunction

      G87-3 (CANP) - G87-2 (CANN)

      Engine switch off

      54 to 69 Ω

      Below 54 Ω:

      Short in line

      Higher than 69 Ω:

      Open in CAN main bus line

      G87-3 (CANP) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Below 6 kΩ:

      +B short

      G87-2 (CANN) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Below 6 kΩ:

      +B short

      G87-3 (CANP) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      Below 200 Ω:

      Ground short

      G87-2 (CANN) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      Below 200 Ω:

      Ground short

      Result

      Result

      Proceed to

      NG

      - Open in CAN main bus line

      A

      NG

      - Short in line

      - +B short

      - Ground short

      B

      OK

      C
    B

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR SIDE)Click here

    C

    CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND GROUND)Click here

    A

  3. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

    1. C220696C09

      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

      Disconnect the G84 No. 1 junction connector connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G84-4 (CANH) - G84-15 (CANL)

      Engine switch off

      108 to 132 Ω

      Resul

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

  4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

    1. C220696C10

      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G84-3 (CANH) - G84-14 (CANL)

      Engine switch off

      108 to 132 Ω

      Resul

      Result

      OK

      NG
    OK

    REPLACE NO. 1 JUNCTION CONNECTOR

    NG

  5. CONNECT CONNECTOR

    1. Reconnect the G84 No. 1 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 6 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

    1. C210060C02

      *a

      Rear view of wire harness connector

      (to No. 6 Junction Connector)

      Disconnect the G87 No. 6 junction connector connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G87-3 (CANP) - G87-2 (CANN)

      Engine switch off

      108 to 132 Ω

      Resul

      Result

      OK

      NG
    OK

    REPLACE NO. 6 JUNCTION CONNECTOR

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

  7. CONNECT CONNECTOR

    1. Reconnect the G84 No. 1 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  8. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

    1. C220696C11

      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

      Disconnect the G81 No. 3 junction connector connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G81-5 (CANH) - G81-16 (CANL)

      Engine switch off

      108 to 132 Ω

      Resul

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

    OK

  9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - MAIN BODY ECU)

    1. C220696C12

      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G81-4 (CANH) - G81-15 (CANL)

      Engine switch off

      108 to 132 Ω

      Resul

      Result

      OK

      NG
    OK

    REPLACE NO. 3 JUNCTION CONNECTOR

    NG

  10. CONNECT CONNECTOR

    1. Reconnect the G81 No. 3 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (MAIN BODY ECU - NO. 3 JUNCTION CONNECTOR)

    1. C221256C01

      *a

      Rear view of wire harness connector

      (to Main Body ECU [Multiplex Network Body ECU])

      Disconnect the G46 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G46-9 (CANP) - G46-10 (CANN)

      Engine switch off

      108 to 132 Ω

      Resul

      Result

      OK

      NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO MAIN BODY ECU (MAIN BODY ECU - NO. 3 JUNCTION CONNECTOR)

  12. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR SIDE)

    1. C220697C16

      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

      *b

      Front view of DLC3

      Disconnect the G81 No. 3 junction connector connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G81-5 (CANH) - G81-16 (CANL)

      Engine switch off

      108 to 132 Ω

      G81-5 (CANH) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-16 (CANL) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-5 (CANH) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G81-16 (CANL) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

  13. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - FRONT POWER SEAT SWITCH LH)

    C220697C17

    *a

    Rear view of wire harness connector

    (to No. 3 Junction Connector)

    *b

    Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G81-2 (CANH) - G81-13 (CANL)

      Engine switch off

      200 Ω or higher

      G81-2 (CANH) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-13 (CANL) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-2 (CANH) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G81-13 (CANL) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

  14. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - MULTIPLEX TILT AND TELESCOPIC ECU)

    C220697C58

    *a

    Rear view of wire harness connector

    (to No. 3 Junction Connector)

    *b

    Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G81-3 (CANH) - G81-14 (CANL)

      Engine switch off

      200 Ω or higher

      G81-3 (CANH) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-14 (CANL) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-3 (CANH) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G81-14 (CANL) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

  15. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - OUTER MIRROR CONTROL ECU LH)

    C220697C19

    *a

    Rear view of wire harness connector

    (to No. 3 Junction Connector)

    *b

    Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G81-1 (CANH) - G81-12 (CANL)

      Engine switch off

      200 Ω or higher

      G81-1 (CANH) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-12 (CANL) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-1 (CANH) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G81-12 (CANL) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

  16. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - MAIN BODY ECU)

    C220697C59

    *a

    Rear view of wire harness connector

    (to No. 3 Junction Connector)

    *b

    Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G81-4 (CANH) - G81-15 (CANL)

      Engine switch off

      108 to 132 Ω

      G81-4 (CANH) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-15 (CANL) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G81-4 (CANH) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G81-15 (CANL) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    OK

    REPLACE NO. 3 JUNCTION CONNECTOR

    NG

    CONNECT CONNECTORClick here

  17. CONNECT CONNECTOR

    1. Reconnect the G81 No. 3 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  18. CHECK FOR SHORT IN CAN BUS WIRES (FRONT POWER SEAT SWITCH LH)

    1. C219237C01

      *a

      Rear view of wire harness connector

      (to Front Power Seat Switch LH)

      *b

      Front view of DLC3

      Disconnect the b5 front power seat switch LH connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      b5-8 (CANP) - b5-7 (CANN)

      Engine switch off

      54 to 69 Ω

      b5-8 (CANP) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      b5-7 (CANN) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      b5-8 (CANP) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      b5-7 (CANN) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    OK

    REPLACE FRONT POWER SEAT SWITCH LH

    Click hereClick hereClick here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO FRONT POWER SEAT SWITCH LH (CANP, CANN)

  19. CONNECT CONNECTOR

    1. Reconnect the G81 No. 3 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  20. CHECK FOR SHORT IN CAN BUS WIRES (MULTIPLEX TILT AND TELESCOPIC ECU)

    1. C216734C01

      *a

      Rear view of wire harness connector

      (to Multiplex Tilt and Telescopic ECU)

      *b

      Front view of DLC3

      Disconnect the G33 multiplex tilt and telescopic ECU connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G33-5 (CANP) - G33-14 (CANN)

      Engine switch off

      54 to 69 Ω

      G33-5 (CANP) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G33-14 (CANN) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G33-5 (CANP) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G33-14 (CANN) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    OK

    REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

    Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MULTIPLEX TILT AND TELESCOPIC ECU (CANP, CANN)

  21. CONNECT CONNECTOR

    1. Reconnect the G81 No. 3 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  22. CHECK FOR SHORT IN CAN BUS WIRES (OUTER MIRROR CONTROL ECU LH)

    1. C221147C01

      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly LH)

      *b

      Front view of DLC3

      Disconnect the K8 outer mirror control ECU assembly LH connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      K8-9 (CANP) - K8-8 (CANN)

      Engine switch off

      54 to 69 Ω

      K8-9 (CANP) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      K8-8 (CANN) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      K8-9 (CANP) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      K8-8 (CANN) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    OK

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH

    Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO OUTER MIRROR CONTROL ECU LH (CANP, CANN)

  23. CONNECT CONNECTOR

    1. Reconnect the G81 No. 3 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  24. CHECK FOR SHORT IN CAN BUS WIRES (MAIN BODY ECU)

    1. C221257C01

      *a

      Rear view of wire harness connector

      (to Main Body ECU [Multiplex Network Body ECU])

      *b

      Front view of DLC3

      Disconnect the G46 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G46-9 (CANP) - G46-10 (CANN)

      Engine switch off

      108 to 132 Ω

      G46-9 (CANP) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G46-10 (CANN) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G46-9 (CANP) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G46-10 (CANN) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO MAIN BODY ECU (CANP, CANN)

  25. CONNECT CONNECTOR

    1. Reconnect the G81 No. 3 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  26. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

    1. C220697C23

      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

      *b

      Front view of DLC3

      Disconnect the G84 No. 1 junction connector connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G84-4 (CANH) - G84-15 (CANL)

      Engine switch off

      108 to 132 Ω

      G84-4 (CANH) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G84-15 (CANL) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G84-4 (CANH) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G84-15 (CANL) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

    OK

  27. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - DRIVING SUPPORT SWITCH CONTROL ECU)

    C220697C61

    *a

    Rear view of wire harness connector

    (to No. 1 Junction Connector)

    *b

    Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G84-2 (CANH) - G84-13 (CANL)

      Engine switch off

      200 Ω or higher

      G84-2 (CANH) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G84-13 (CANL) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G84-2 (CANH) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G84-13 (CANL) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

  28. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - OUTER MIRROR CONTROL ECU RH)

    C220697C25

    *a

    Rear view of wire harness connector

    (to No. 1 Junction Connector)

    *b

    Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G84-1 (CANH) - G84-12 (CANL)

      Engine switch off

      200 Ω or higher

      G84-1 (CANH) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G84-12 (CANL) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G84-1 (CANH) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G84-12 (CANL) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

  29. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

    C220697C60

    *a

    Rear view of wire harness connector

    (to No. 1 Junction Connector)

    *b

    Front view of DLC3

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G84-3 (CANH) - G84-14 (CANL)

      Engine switch off

      108 to 132 Ω

      G84-3 (CANH) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G84-14 (CANL) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G84-3 (CANH) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G84-14 (CANL) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    OK

    REPLACE NO. 1 JUNCTION CONNECTOR

    NG

    CONNECT CONNECTORClick here

  30. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND GROUND)

    1. Connect the cable to the negative (-) battery terminal.

      Note:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

      Click hereClick hereClick hereClick here

      C215398C02

      *a

      Rear view of wire harness connector

      (to Main Body ECU [Multiplex Network Body ECU])

      *b

      Front view of wire harness connector

      (to Main Body ECU [Multiplex Network Body ECU])

    2. Remove the main body ECU (multiplex network body ECU).

      Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G46-3 (GND2) - Body ground

      Always

      Below 1 Ω

      A-11 (GND1) - Body ground

      Always

      Below 1 Ω

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A-30 (BECU) - Body ground

      Always

      11 to 14 V

      A-31 (ALTB) - Body ground

      Always

      11 to 14 V

      A-29 (ACC) - Body ground

      Engine switch on (ACC)

      11 to 14 V

      A-32 (IG) - Body ground

      Engine switch on (ACC)

      11 to 14 V

      Resul

      Result

      OK

      NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  31. CONNECT CONNECTOR

    1. Reconnect the G84 No. 1 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  32. CHECK FOR SHORT IN CAN BUS WIRES (DRIVING SUPPORT SWITCH CONTROL ECU)

    1. C216736C01

      *a

      Rear view of wire harness connector

      (to Driving Support Switch Control ECU)

      *b

      Front view of DLC3

      Disconnect the G60 driving support switch control ECU connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G60-9 (CANP) - G60-10 (CANN)

      Engine switch off

      54 to 69 Ω

      G60-9 (CANP) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G60-10 (CANN) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G60-9 (CANP) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G60-10 (CANN) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    OK

    REPLACE DRIVING SUPPORT SWITCH CONTROL ECU

    Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DRIVING SUPPORT SWITCH CONTROL ECU (CANP, CANN)

  33. CONNECT CONNECTOR

    1. Reconnect the G84 No. 1 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  34. CHECK FOR SHORT IN CAN BUS WIRES (OUTER MIRROR CONTROL ECU RH)

    1. C221147C02

      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly RH)

      *b

      Front view of DLC3

      Disconnect the J8 outer mirror control ECU assembly RH connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      J8-9 (CANP) - J8-8 (CANN)

      Engine switch off

      54 to 69 Ω

      J8-9 (CANP) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      J8-8 (CANN) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      J8-9 (CANP) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      J8-8 (CANN) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    OK

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH

    Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO OUTER MIRROR CONTROL ECU RH (CANP, CANN)

  35. CONNECT CONNECTOR

    1. Reconnect the G84 No. 1 junction connector connector.

      Result

      Result

      NEXT
    NEXT

  36. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR)

    1. C216700C02

      *a

      Rear view of wire harness connector

      (to No. 6 Junction Connector)

      *b

      Front view of DLC3

      Disconnect the G87 No. 6 junction connector connector.

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

      Standard Resistance

      Tester Connection

      Switch Condition

      Specified Condition

      G87-3 (CANP) - G87-2 (CANN)

      Engine switch off

      108 to 132 Ω

      G87-3 (CANP) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G87-2 (CANN) - G37-4 (CG)

      Engine switch off

      200 Ω or higher

      G87-3 (CANP) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      G87-2 (CANN) - G37-16 (BAT)

      Engine switch off

      6 kΩ or higher

      Resul

      Result

      OK

      NG
    OK

    REPLACE NO. 6 JUNCTION CONNECTOR

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)