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HOMESERVICE MANUALSTOYOTA2018SIENNA LIMITED, AWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESCAN COMMUNICATION SYSTEM - DIAGNOSTIC CODES (1 OF 2)CAN COMMUNICATION SYSTEMDTC U1002: LOST COMMUNICATION WITH GATEWAY MODULE [11/2017 - 08/2018]PROCEDURE
2018 Toyota Sienna Limited, AWD

DTC U1002: Lost Communication with Gateway Module [11/2017 - 08/2018]: Procedure

2018 Toyota Sienna Limited, AWDSECTION Procedure
  1. CHECK CAN BUS WIRE (MAIN WIRE FOR DISCONNECTION, BUS LINE FOR SHORT CIRCUIT) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Measure the resistance according to the value(s) in the table below.
      GTY752072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Resistance Malfunction
      D120-1 (CANH) - D120-2 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 53 Ω: Short in line
      Cable disconnected from negative (-) battery terminal 70 Ω or higher: Open in CAN main bus line
      D120-1 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: +B short
      D120-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: +B short
      D120-1 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: Ground short
      D120-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: Ground short
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Junction connector with harness connected
      (No. 1 CAN Junction Connector)
      RESULT

      Result Proceed to
      NG
      - Open in CAN main wire      		 A
      NG
      - Short in line
      - +B short
      - Ground short      		 B
      OK C

    Result: 

    B 

    See step  8

    Result: 

    C 

    See step  39

    Result: 

    A 

    See step  2

  2. CHECK FOR OPEN IN MAIN BUS WIRE (NO. 1 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the No. 1 CAN junction connector connector.
      GTY731314Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D120-1 (CANH) - D120-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    NG 

    See step  4

    Result: 

    OK 

    See step  3

  3. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Disconnect the No. 1 CAN junction connector connector.
      GTY711458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D117-1 (CANH) - D117-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    OK 

    REPAIR OR REPLACE NO. 1 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  6

  4. CONNECT CONNECTOR 
    1. Reconnect the D120 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  5

  5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - NO. 1 CAN JUNCTION CONNECTOR) 
    1. Disconnect the main body ECU (multiplex network body ECU) connector.
      GTY714662Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D14-9 (CANP) - D14-10 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Main Body ECU (Multiplex Network Body ECU))

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    (Refer to REMOVAL [12/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

  6. CONNECT CONNECTOR 
    1. Reconnect the D117 and D120 No. 1 CAN junction connector connectors.

    Result: 

    NEXT 

    See step  7

  7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 CAN JUNCTION TERMINAL - NO. 1 CAN JUNCTION CONNECTOR) 
    1. Disconnect the No. 1 CAN junction terminal connector.
      GTY696676Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D183-3 (CANH) - D183-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to No. 1 CAN Junction Terminal)

    Result: 

    OK 

    REPLACE NO. 1 CAN JUNCTION TERMINAL 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO NO. 1 CAN JUNCTION TERMINAL 

  8. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Disconnect the No. 1 CAN junction connector connector.
      GTY765165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D117-1 (CANH) - D117-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      D117-1 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D117-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D117-1 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D117-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    NG 

    See step  23

    Result: 

    OK 

    See step  9

  9. CONNECT CONNECTOR 
    1. Reconnect the D117 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  10

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

    HINT: 

    For vehicle without seat position memory system, go to step 14.

    1. Disconnect the No. 1 CAN junction connector connector.
      GTY767162Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D118-1 (CANH) - D118-2 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D118-1 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D118-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D118-1 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D118-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    NG 

    See step  25

    Result: 

    OK 

    See step  11

  11. CONNECT CONNECTOR 
    1. Reconnect the D118 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  12

  12. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION CONNECTOR - SLIDE DOOR MOTOR UNIT RH) 

    HINT: 

    For vehicle without power slide door, go to step 16.

    1. Disconnect the No. 1 CAN junction connector connector.
      GTY741875Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D119-1 (CANH) - D119-2 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D119-1 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D119-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D119-1 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D119-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    NG 

    See step  27

    Result: 

    OK 

    See step  13

  13. CONNECT CONNECTOR 
    1. Reconnect the D119 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  14

  14. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION CONNECTOR - FRONT POWER SEAT SWITCH LH) 

    HINT: 

    For vehicle without seat position memory system, go to step 18.

    1. Disconnect the No. 1 CAN junction connector connector.
      GTY769215Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D121-1 (CANH) - D121-2 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D121-1 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D121-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D121-1 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D121-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    NG 

    See step  29

    Result: 

    OK 

    See step  15

  15. CONNECT CONNECTOR 
    1. Reconnect the D121 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  16

  16. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION CONNECTOR - POWER BACK DOOR UNIT ASSEMBLY (BACK DOOR ECU)) 

    HINT: 

    For vehicle without power back door, go to step 20.

    1. Disconnect the No. 1 CAN junction connector connector.
      GTY745008Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D122-1 (CANH) - D122-2 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D122-1 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D122-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D122-1 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D122-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    NG 

    See step  31

    Result: 

    OK 

    See step  17

  17. CONNECT CONNECTOR 
    1. Reconnect the D122 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  18

  18. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION CONNECTOR - SLIDE DOOR MOTOR UNIT LH) 

    HINT: 

    For vehicle without power slide door, go to step 22.

    1. Disconnect the No. 1 CAN junction connector connector.
      GTY745859Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D123-1 (CANH) - D123-2 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D123-1 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D123-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D123-1 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D123-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    NG 

    See step  33

    Result: 

    OK 

    See step  19

  19. CONNECT CONNECTOR 
    1. Reconnect the D123 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  20

  20. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION CONNECTOR - OUTER MIRROR CONTROL ECU ASSEMBLY LH) 

    HINT: 

    For vehicle without seat position memory system, go to step 24.

    1. Disconnect the No. 1 CAN junction connector connector.
      GTY771413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D124-1 (CANH) - D124-2 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D124-1 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D124-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D124-1 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D124-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    NG 

    See step  35

    Result: 

    OK 

    See step  21

  21. CONNECT CONNECTOR 
    1. Reconnect the D124 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  22

  22. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the No. 1 CAN junction connector connector.
      GTY756273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D120-1 (CANH) - D120-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      D120-1 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D120-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D120-1 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D120-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)

    Result: 

    OK 

    REPAIR OR REPLACE NO. 1 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  37

  23. CONNECT CONNECTOR 
    1. Reconnect the D117 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  24

  24. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION TERMINAL) 
    1. Disconnect the No. 1 CAN junction terminal connector.
      GTY745702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D183-3 (CANH) - D183-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      D183-3 (CANH) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D183-2 (CANL) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D183-3 (CANH) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D183-2 (CANL) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Front view of wire harness connector
      (to No. 1 CAN Junction Terminal)

    Result: 

    OK 

    REPLACE NO. 1 CAN JUNCTION TERMINAL 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO NO. 1 CAN JUNCTION TERMINAL (CAN-H, CAN-L) 

  25. CONNECT CONNECTOR 
    1. Reconnect the D118 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  26

  26. CHECK FOR SHORT IN CAN BUS WIRES (OUTER MIRROR CONTROL ECU ASSEMBLY RH) 
    1. Disconnect the outer mirror control ECU assembly RH connector.
      GTY758262Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G3-9 (CANP) - G3-8 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G3-9 (CANP) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G3-8 (CANN) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      G3-9 (CANP) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G3-8 (CANN) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Front view of wire harness connector
      (to Outer Mirror Control ECU Assembly RH)

    Result: 

    OK 

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH 

    (Refer to REMOVAL [12/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO OUTER MIRROR CONTROL ECU ASSEMBLY RH (CAN-H, CAN-L) 

  27. CONNECT CONNECTOR 
    1. Reconnect the D119 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  28

  28. CHECK FOR SHORT IN CAN BUS WIRES (SLIDE DOOR MOTOR UNIT RH) 
    1. Disconnect the slide door motor unit RH connector.
      GTY761341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I8-8 (MPX1) - I8-2 (MPX2) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      I8-8 (MPX1) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I8-2 (MPX2) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      I8-8 (MPX1) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      I8-2 (MPX2) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Front view of wire harness connector
      (to Slide Door Motor Unit RH)

    Result: 

    OK 

    REPLACE SLIDE DOOR MOTOR UNIT RH 

    (Refer to REMOVAL [12/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SLIDE DOOR MOTOR UNIT RH (CAN-H, CAN-L) 

  29. CONNECT CONNECTOR 
    1. Reconnect the D121 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  30

  30. CHECK FOR SHORT IN CAN BUS WIRES (FRONT POWER SEAT SWITCH LH) 
    1. Disconnect the front power seat switch LH connector.
      GTY765970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Y9-8 - Y9-7 Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Y9-8 - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      Y9-7 - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      Y9-8 - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      Y9-7 - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Front view of wire harness connector
      (to Front Power Seat Switch LH)

    Result: 

    OK 

    REPLACE FRONT POWER SEAT SWITCH LH 

    (Refer to DISASSEMBLY [12/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO FRONT POWER SEAT SWITCH LH (CAN-H, CAN-L) 

  31. CONNECT CONNECTOR 
    1. Reconnect the D122 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  32

  32. CHECK FOR SHORT IN CAN BUS WIRES (POWER BACK DOOR UNIT ASSEMBLY (BACK DOOR ECU)) 
    1. Disconnect the power back door unit assembly (back door ECU) connector.
      GTY768454Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K14-6 (CANP) - K14-5 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      K14-6 (CANP) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      K14-5 (CANN) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      K14-6 (CANP) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      K14-5 (CANN) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Front view of wire harness connector
      (to Power Back Door Unit Assembly (Back Door ECU))

    Result: 

    OK 

    REPLACE POWER BACK DOOR UNIT ASSEMBLY (BACK DOOR ECU) 

    (Refer to REMOVAL [12/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER BACK DOOR UNIT ASSEMBLY (BACK DOOR ECU) (CAN-H, CAN-L) 

  33. CONNECT CONNECTOR 
    1. Reconnect the D123 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  34

  34. CHECK FOR SHORT IN CAN BUS WIRES (SLIDE DOOR MOTOR UNIT LH) 
    1. Disconnect the slide door motor unit LH connector.
      GTY763675Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J9-11 (MPX1) - J9-5 (MPX2) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      J9-11 (MPX1) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      J9-5 (MPX2) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      J9-11 (MPX1) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      J9-5 (MPX2) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Front view of wire harness connector
      (to Slide Door Motor Unit LH)

    Result: 

    OK 

    REPLACE SLIDE DOOR MOTOR UNIT LH 

    (Refer to REMOVAL [12/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SLIDE DOOR MOTOR UNIT LH (CAN-H, CAN-L) 

  35. CONNECT CONNECTOR 
    1. Reconnect the D124 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  36

  36. CHECK FOR SHORT IN CAN BUS WIRES (OUTER MIRROR CONTROL ECU ASSEMBLY LH) 
    1. Disconnect the outer mirror control ECU assembly LH connector.
      GTY759020Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H2-9 (CANP) - H2-8 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      H2-9 (CANP) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      H2-8 (CANN) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      H2-9 (CANP) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      H2-8 (CANN) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Front view of wire harness connector
      (to Outer Mirror Control ECU Assembly LH)

    Result: 

    OK 

    REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH 

    (Refer to REMOVAL [12/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO OUTER MIRROR CONTROL ECU ASSEMBLY LH (CAN-H, CAN-L) 

  37. CONNECT CONNECTOR 
    1. Reconnect the D120 No. 1 CAN junction connector connector.

    Result: 

    NEXT 

    See step  38

  38. CHECK FOR SHORT IN CAN BUS WIRES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 
    1. Disconnect the main body ECU (multiplex network body ECU) connector.
      GTY742159Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D14-9 (CANP) - D14-10 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      D14-9 (CANP) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D14-10 (CANN) - D16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      D14-9 (CANP) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D14-10 (CANN) - D16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 DLC3
      *a Front view of wire harness connector
      (to Main Body ECU (Multiplex Network Body ECU))

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    (Refer to REMOVAL [12/2015 - ] )

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (CAN-H, CAN-L) 

  39. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER SOURCE) 
    1. Disconnect the instrument panel junction block assembly connectors.
      GTY738358Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2D-28 - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
    3. Reconnect the cable to the negative (-) battery terminal.
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [11/2017 - ] ).

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

      Standard Voltage

      Tester Connection Condition Specified Condition
      2K-1 - Body ground Always 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Instrument Panel Junction Block Assembly)

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  40

  40. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    1. Remove the instrument panel junction block assembly (Refer to REMOVAL [12/2015 - ] ).
    2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly (Refer to REMOVAL [12/2015 - ] ).
    3. Measure the resistance according to the value(s) in the table below.
      GTY731517Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      2K-1 - 2I-31 (ALTB) Always Below 1 Ω
      2D-28 - 2I-11 (GND1) Always Below 1 Ω

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    (Refer to REMOVAL [12/2015 - ] )

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    (Refer to REMOVAL [12/2015 - ] )

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
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  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.