CAN COMMUNICATION SYSTEM(for LHD), Diagnostic DTC:U1002

DTC Code DTC Name
U1002 Lost Communication with Gateway Module (Main Body ECU)

DESCRIPTION


DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
U1002 Lost Communication with Gateway Module (Main Body ECU) Lost communication with the gateway module.

  • Open or short in sub bus 1 main wire or connector

  • Short in sub bus 1 branch wire or connector

  • Main body ECU (multiplex network body ECU)

  • Front multiplex network door ECU LH

  • Front multiplex network door ECU RH

  • Position control ECU and switch assembly LH

  • Position control ECU and switch assembly RH

  • Luggage closer motor assembly*1

  • Multiplex network door ECU*2

  • Multiplex tilt and telescopic ECU

  • No. 4 CAN junction connector

  • No. 7 CAN junction connector

  • No. 10 CAN junction connector

  • No. 1 CAN junction terminal

 Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

B002CV9E05
B002D21E04

CAUTION / NOTICE / HINT

Note


  • Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

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

    Click here

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

  • DTC check procedure: Turn the engine switch on (IG) and wait at least 20 seconds.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed.

    Click here

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

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

Tech Tips


  • Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE


  1. CHECK SUB BUS 1


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B002D09C33
      *a

      Component with harness connected

      (Main Body ECU (Multiplex Network Body ECU))
      *b Front view of DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K12-9 (CANP) - K12-10 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
      70 Ω or more: Open circuit in main bus lines
      K12-9 (CANP) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K12-10 (CANN) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K12-9 (CANP) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K12-10 (CANN) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      Open circuit in CAN main bus wire B
      Short circuit between bus wire C

      • Short to ground

      • +B short

      		 D

    B

    CHECK FOR OPEN IN CAN BUS MAIN WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) Click here

    C

    CHECK FOR SHORT IN CAN BUS WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) Click here

    D

    CHECK FOR SHORT IN CAN BUS WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) Click here

    A

  2. CHECK FOR DTC OUTPUT


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

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch to on (IG).

    4. Turn the GTS on.

    5. Clear the DTCs.


      Body Electrical > Main Body > Clear DTCs

    6. Turn the engine switch off.

    7. Turn the engine switch to on (IG).

    8. Check for DTCs.


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTC U1002 is not output from the main body ECU (multiplex network body ECU) (GTS display: Main Body) A
      DTC U1002 is output from the main body ECU (multiplex network body ECU) (GTS display: Main Body) B

    A

    SYMPTOM SIMULATION Click here

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  3. CHECK FOR OPEN IN CAN BUS MAIN WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. B002CTEC54
      *a

      Front view of wire harness connector

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

      Disconnect the 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 Condition Specified Condition
      K12-9 (CANP) - K12-10 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

  4. CONNECT CONNECTOR


    1. Reconnect the K12 main body ECU (multiplex network body ECU) connector.

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 CAN JUNCTION TERMINAL)


    1. B002ET0C67
      *a

      Front view of wire harness connector

      (to No. 1 CAN Junction Terminal)

      Disconnect the No. 1 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K111-3 (CANP) - K111-2 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 1 CAN JUNCTION TERMINAL

    NG

  6. CONNECT CONNECTOR


    1. Reconnect the K111 No. 1 CAN junction terminal connector.

      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 10 CAN JUNCTION CONNECTOR)


    1. B002DQNC32
      *a

      Front view of wire harness connector

      (to No. 10 CAN Junction Connector)
      *b to Main Body ECU (Multiplex Network Body ECU)
      *c to No. 4 CAN Junction Connector

      Disconnect the No. 10 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U55-20 (CANH) - U55-9 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      U55-21 (CANH) - U55-10 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 4 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Main body ECU (multiplex network body ECU) main wire) B
      NG (No. 4 CAN junction connector main wire) C

    A

    REPLACE NO. 10 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

  8. CONNECT CONNECTOR


    1. Reconnect the U55 No. 10 CAN junction connector.

      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 4 CAN JUNCTION CONNECTOR)


    1. B002DQNC33
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)
      *b to No. 10 CAN Junction Connector
      *c to No. 7 CAN Junction Connector

      Disconnect the No. 4 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K105-8 (CANH) - K105-19 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 10 CAN junction connector
      K105-11 (CANH) - K105-22 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 7 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 10 CAN junction connector main wire) B
      NG (No. 7 CAN junction connector main wire) C

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

    C

  10. CONNECT CONNECTOR


    1. Reconnect the K105 No. 4 CAN junction connector.

      Result
      Proceed to
      NEXT

    NEXT

  11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 7 CAN JUNCTION CONNECTOR)


    1. B002DQNC34
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)
      *b to No. 4 CAN Junction Connector
      *c to No. 1 CAN Junction Terminal

      Disconnect the No. 7 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K109-7 (CANH) - K109-18 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 4 CAN junction connector
      K109-10 (CANH) - K109-21 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 1 CAN junction terminal
      Result
      Result Proceed to
      OK A
      NG (No. 4 CAN junction connector main wire) B
      NG (No. 1 CAN junction terminal main wire) C

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL)

  12. CHECK FOR SHORT IN CAN BUS WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. B002CTEC55
      *a

      Front view of wire harness connector

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

      Disconnect the 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 Condition Specified Condition
      K12-9 (CANP) - K12-10 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

  13. CONNECT CONNECTOR


    1. Reconnect the K12 main body ECU (multiplex network body ECU) connector.

      Result
      Proceed to
      NEXT

    NEXT

  14. CHECK FOR SHORT IN CAN BUS WIRE (NO. 1 CAN JUNCTION TERMINAL)


    1. B002ET0C68
      *a

      Front view of wire harness connector

      (to No. 1 CAN Junction Terminal)

      Disconnect the No. 1 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K111-3 (CANP) - K111-2 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 1 CAN JUNCTION TERMINAL

    NG

  15. CONNECT CONNECTOR


    1. Reconnect the K111 No. 1 CAN junction terminal connector.

      Result
      Proceed to
      NEXT

    NEXT

  16. CHECK FOR SHORT IN CAN BUS WIRE (NO. 10 CAN JUNCTION CONNECTOR)


    1. B002DQNC35
      *a

      Front view of wire harness connector

      (to No. 10 CAN Junction Connector)
      *b to Main Body ECU (Multiplex Network Body ECU)
      *c to No. 4 CAN Junction Connector
      *d to Luggage Closer Motor Assembly (w/ Power Trunk Lid System) or Multiplex Network Door ECU (w/o Power Trunk Lid System)

      Disconnect the No. 10 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      U55-20 (CANH) - U55-9 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      U55-21 (CANH) - U55-10 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 4 CAN junction connector
      U55-22 (CANH) - U55-11 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Luggage closer motor assembly*1 or Multiplex network door ECU*2

      • *1: w/ Power Trunk Lid System

      • *2: w/o Power Trunk Lid System

      Result
      Result Proceed to
      OK A
      NG (Main body ECU (multiplex network body ECU) main wire) B
      NG (ECU or sensor branch wire) C
      NG (No. 4 CAN junction connector main wire) D

    A

    REPLACE NO. 10 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

    GO TO STEP 21 Click here

    D

  17. CONNECT CONNECTOR


    1. Reconnect the U55 No. 10 CAN junction connector connector.

      Result
      Proceed to
      NEXT

    NEXT

  18. CHECK FOR SHORT IN CAN BUS WIRE (NO. 4 CAN JUNCTION CONNECTOR)


    1. B002DQNC36
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)
      *b to Front Multiplex Network Door ECU LH
      *c to No. 10 CAN Junction Connector
      *d to Position Control ECU and Switch Assembly LH
      *e to Multiplex Tilt and Telescopic ECU
      *f to No. 7 CAN Junction Connector

      Disconnect the No. 4 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K105-7 (CANH) - K105-18 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Front multiplex network door ECU LH
      K105-8 (CANH) - K105-19 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 10 CAN junction connector
      K105-9 (CANH) - K105-20 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Position control ECU and switch assembly LH
      K105-10 (CANH) - K105-21 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Multiplex tilt and telescopic ECU
      K105-11 (CANH) - K105-22 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 7 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 10 CAN junction connector) B
      NG (ECU or sensor branch wire) C
      NG (No. 7 CAN junction connector main wire) D

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 21 Click here

    D

  19. CONNECT CONNECTOR


    1. Reconnect the K105 No. 4 CAN junction connector connector.

      Result
      Proceed to
      NEXT

    NEXT

  20. CHECK FOR SHORT IN CAN BUS WIRE (NO. 7 CAN JUNCTION CONNECTOR)


    1. B002DQNC37
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)
      *b to No. 4 CAN Junction Connector
      *c to Position Control ECU and Switch Assembly RH
      *d No. 1 CAN Junction Terminal
      *e to Front Multiplex Network Door ECU RH

      Disconnect the No. 7 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K109-7 (CANH) - K109-18 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 4 CAN junction connector
      K109-9 (CANH) - K109-20 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Position control ECU and switch assembly RH
      K109-10 (CANH) - K109-21 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 1 CAN junction terminal
      K109-11 (CANH) - K109-22 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Front multiplex network door ECU RH
      Result
      Result Proceed to
      OK A
      NG (No. 4 CAN junction connector main wire) B
      NG (ECU or sensor branch wire) C
      NG (No. 1 CAN junction terminal main wire) D

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL)

    C

  21. CHECK FOR SHORT IN CAN BUS WIRE (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.

      Click here

    3. B002CQBC27
      *a

      Component with harness connected

      (Main Body ECU (Multiplex Network Body ECU))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K12-9 (CANP) - K12-10 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Tech Tips

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH WIRE OR CONNECTOR

  22. CHECK FOR SHORT IN CAN BUS WIRE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. B002CYIC17
      *a

      Front view of wire harness connector

      (to Main Body ECU (Multiplex Network Body ECU))
      *b Front view of DLC3

      Disconnect the 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 Condition Specified Condition Result
      K12-9 (CANP) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K12-10 (CANN) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K12-9 (CANP) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K12-10 (CANN) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

  23. CONNECT CONNECTOR


    1. Reconnect the K12 main body ECU (multiplex network body ECU) connector.

      Result
      Proceed to
      NEXT

    NEXT

  24. CHECK FOR SHORT IN CAN BUS WIRE (NO. 1 CAN JUNCTION TERMINAL)


    1. B002CA3C31
      *a

      Front view of wire harness connector

      (to No. 1 CAN Junction Terminal)
      *b Front view of DLC3

      Disconnect the No. 1 CAN junction terminal connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K111-3 (CANP) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K111-2 (CANN) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K111-3 (CANP) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K111-2 (CANN) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result
      OK
      NG

    OK

    REPLACE NO. 1 CAN JUNCTION TERMINAL

    NG

  25. CONNECT CONNECTOR


    1. Reconnect the K12 main body ECU (multiplex network body ECU) connector.

      Result
      Proceed to
      NEXT

    NEXT

  26. CHECK FOR SHORT IN CAN BUS WIRE (NO. 10 CAN JUNCTION CONNECTOR)


    1. Disconnect the No. 10 CAN junction connector.

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

      B002CSWC04
      *a

      Front view of wire harness connector

      (to No. 10 CAN Junction Connector)

      		 *b Front view of DLC3
      *c to Main Body ECU (Multiplex Network Body ECU) *d to No. 4 CAN Junction Connector
      *e to Luggage Closer Motor Assembly (w/ Power Trunk Lid System) or Multiplex Network Door ECU (w/o Power Trunk Lid System) - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      U55-20 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Main body ECU (multiplex network body ECU)
      U55-9 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U55-21 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 4 CAN junction connector
      U55-10 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U55-22 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Luggage closer motor assembly*1 or Multiplex network door ECU*2
      U55-11 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      U55-20 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Main body ECU (multiplex network body ECU)
      U55-9 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U55-21 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 4 CAN junction connector
      U55-10 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      U55-22 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Luggage closer motor assembly*1 or Multiplex network door ECU*2
      U55-11 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *1: w/ Power Trunk Lid System

      • *2: w/o Power Trunk Lid System

      Result
      Result Proceed to
      OK A
      NG (Main body ECU (multiplex network body ECU) main wire) B
      NG (ECU or sensor branch wire) C
      NG (No. 4 CAN junction connector main wire) D

    A

    REPLACE NO. 10 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

    GO TO STEP 31 Click here

    D

  27. CONNECT CONNECTOR


    1. Reconnect the U55 No. 10 CAN junction connector connector.

      Result
      Proceed to
      NEXT

    NEXT

  28. CHECK FOR SHORT IN CAN BUS WIRE (NO. 4 CAN JUNCTION CONNECTOR)


    1. Disconnect the No. 4 CAN junction connector.

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

      B002CSWC05
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)

      		 *b Front view of DLC3
      *c to Front Multiplex Network Door ECU LH *d to No. 10 CAN Junction Connector
      *e to Position Control ECU and Switch Assembly LH *f to Multiplex Tilt and Telescopic ECU
      *g to No. 7 CAN Junction Connector - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K105-7 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Front multiplex network door ECU LH
      K105-18 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K105-8 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 10 CAN junction connector
      K105-19 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K105-9 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Position control ECU and switch assembly LH
      K105-20 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K105-10 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Multiplex tilt and telescopic ECU
      K105-21 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K105-11 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 7 CAN junction connector
      K105-22 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K105-7 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Front multiplex network door ECU LH
      K105-18 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K105-8 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 10 CAN junction connector
      K105-19 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K105-9 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Position control ECU and switch assembly LH
      K105-20 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K105-10 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Multiplex tilt and telescopic ECU
      K105-21 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K105-11 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 7 CAN junction connector
      K105-22 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      NG (No. 10 CAN junction connector main wire) B
      NG (ECU or sensor branch wire) C
      NG (No. 7 CAN junction connector main wire) D

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

    C

    GO TO STEP 31 Click here

    D

  29. CONNECT CONNECTOR


    1. Reconnect the K105 No. 4 CAN junction connector connector.

      Result
      Proceed to
      NEXT

    NEXT

  30. CHECK FOR SHORT IN CAN BUS WIRE (NO. 7 CAN JUNCTION CONNECTOR)


    1. Disconnect the No. 7 CAN junction connector.

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

      B002CSWC06
      *a

      Front view of wire harness connector

      (to No. 7 CAN Junction Connector)

      		 *b Front view of DLC3
      *c to No. 4 CAN Junction Connector *d to Position Control ECU and Switch Assembly RH
      *e to No. 1 CAN Junction Terminal *f to Front Multiplex Network Door ECU RH
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K109-7 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 4 CAN junction connector
      K109-18 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K109-9 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Position control ECU and switch assembly RH
      K109-20 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K109-10 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 1 CAN junction terminal
      K109-21 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K109-11 (CANH) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Front multiplex network door ECU RH
      K109-22 (CANL) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K109-7 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 4 CAN junction connector
      K109-18 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K109-9 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Position control ECU and switch assembly RH
      K109-20 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K109-10 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 1 CAN junction terminal
      K109-21 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K109-11 (CANH) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Front multiplex network door ECU RH
      K109-22 (CANL) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      NG (No. 4 CAN junction connector main wire) B
      NG (ECU or sensor branch wire) C
      NG (No. 1 CAN junction terminal main wire) D

    A

    REPLACE NO. 7 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL)

    C

  31. CHECK FOR SHORT IN CAN BUS WIRE (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to +B or shorted to GND is connected.

      Click here

    3. B002D09C30
      *a

      Component with harness connected

      (Main Body ECU (Multiplex Network Body ECU))
      *b Front view of DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K12-9 (CANP) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K12-10 (CANN) - K16-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K12-9 (CANP) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K12-10 (CANN) - K16-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH WIRE OR CONNECTOR