DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (Except HV) - Circuit Tests (1 Of 8) & Diagnostic Codes >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message [11/2023 - ] >> Procedure

DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message [11/2023 - ]: Procedure

  1. CHECK FOR OPEN IN CAN MAIN BUS LINES 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU (Network Gateway ECU))

      Standard Resistance

      Tester Connection Condition Specified Condition
      H143-10 (CAVH) - H143-11 (CAVL) Cable disconnected from negative (-) battery terminal Below 70 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  32

    Result: 

    OK 

    See step  2

  2. CHECK FOR SHORT IN CAN BUS LINES 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1177911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU (Network Gateway ECU))

      Standard Resistance

      Tester Connection Condition Specified Condition
      H143-10 (CAVH) - H143-11 (CAVL) Cable disconnected from negative (-) battery terminal 54 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  23

    Result: 

    OK 

    See step  3

  3. CHECK FOR SHORT TO +B IN CAN BUS LINE 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1178564Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Component with harness connected
      (Central Gateway ECU (Network Gateway ECU))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      H143-10 (CAVH) - H56-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      H143-11 (CAVL) - H56-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  14

    Result: 

    OK 

    See step  4

  4. CHECK FOR SHORT TO GND IN CAN BUS LINE 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1178571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Component with harness connected
      (Central Gateway ECU (Network Gateway ECU))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      H143-10 (CAVH) - H56-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      H143-11 (CAVL) - H56-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    See step  5

  5. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the A92 No. 12 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177927Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-11 (CANH) - H56-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A92-22 (CANL) - H56-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  10

    Result: 

    OK 

    See step  6

  6. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1177921Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Brake Actuator Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-9 (CANH) - H56-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A92-20 (CANL) - H56-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  11

    Result: 

    OK 

    See step  7

  7. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Stop and Start System A
      w/o Stop and Start System B

    Result: 

    B 

    See step  9

    Result: 

    A 

    See step  8

  8. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1177922Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Engine Stop and Start ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-10 (CANH) - H56-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A92-21 (CANL) - H56-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  9

  9. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1177923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to ECM

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-8 (CANH) - H56-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A92-19 (CANL) - H56-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 12 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  13

  10. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the H143 central gateway ECU (network gateway ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177927Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-11 (CANH) - H56-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A92-22 (CANL) - H56-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 

  11. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the A39 brake actuator assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177921Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Brake Actuator Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-9 (CANH) - H56-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A92-20 (CANL) - H56-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 

  12. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Disconnect the H66 engine stop and start ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177922Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Engine Stop and Start ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-10 (CANH) - H56-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A92-21 (CANL) - H56-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE STOP AND START ECU 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 

  13. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A83 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to ECM

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-8 (CANH) - H56-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      A92-19 (CANL) - H56-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ECM) 

  14. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the A92 No. 12 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-11 (CANH) - H56-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      A92-22 (CANL) - H56-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  19

    Result: 

    OK 

    See step  15

  15. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1177704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Brake Actuator Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-9 (CANH) - H56-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      A92-20 (CANH) - H56-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  20

    Result: 

    OK 

    See step  16

  16. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Stop and Start System A
      w/o Stop and Start System B

    Result: 

    B 

    See step  18

    Result: 

    A 

    See step  17

  17. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1177925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Engine Stop and Start ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-10 (CANH) - H56-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      A92-21 (CANL) - H56-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  21

    Result: 

    OK 

    See step  18

  18. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1177926Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to ECM

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-8 (CANH) - H56-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      A92-19 (CANL) - H56-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 12 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  22

  19. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the H143 central gateway ECU (network gateway ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-11 (CANH) - H56-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      A92-22 (CANL) - H56-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 

  20. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the A39 brake actuator assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Brake Actuator Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-9 (CANH) - H56-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      A92-20 (CANH) - H56-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 

  21. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Disconnect the H66 engine stop and start ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Engine Stop and Start ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-10 (CANH) - H56-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      A92-21 (CANL) - H56-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE STOP AND START ECU 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 

  22. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A83 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1177926Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to ECM

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-8 (CANH) - H56-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      A92-19 (CANL) - H56-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ECM) 

  23. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the A92 No. 12 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1179592Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-11 (CANH) - A92-22 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    See step  28

    Result: 

    OK 

    See step  24

  24. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1179590Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Brake Actuator Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-9 (CANH) - A92-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    See step  29

    Result: 

    OK 

    See step  25

  25. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Stop and Start System A
      w/o Stop and Start System B

    Result: 

    B 

    See step  27

    Result: 

    A 

    See step  26

  26. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1179591Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Engine Stop and Start ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-10 (CANH) - A92-21 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    See step  30

    Result: 

    OK 

    See step  27

  27. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1179589Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to ECM

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-8 (CANH) - A92-19 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 12 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  31

  28. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the H143 central gateway ECU (network gateway ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1179592Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-11 (CANH) - A92-22 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 

  29. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the A39 brake actuator assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1179590Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Brake Actuator Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-9 (CANH) - A92-20 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 

  30. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Disconnect the H66 engine stop and start ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1179591Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Engine Stop and Start ECU

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-10 (CANH) - A92-21 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE STOP AND START ECU 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 

  31. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A83 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1179589Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to ECM

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-8 (CANH) - A92-19 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - ECM) 

  32. CHECK FOR OPEN IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the H143 central gateway ECU (network gateway ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H143-10 (CAVH) - H143-11 (CAVL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      GTY1179573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU (Network Gateway ECU))

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    See step  33

  33. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Reconnect the H143 central gateway ECU (network gateway ECU) connector.
    2. Disconnect the A92 No. 12 global CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1179592Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-11 (CANH) - A92-22 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 

    Result: 

    OK 

    See step  34

  34. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 12 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1179590Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 12 Global CAN Junction Connector)      		 *b to Brake Actuator Assembly

      Standard Resistance

      Tester Connection Condition Specified Condition
      A92-9 (CANH) - A92-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 12 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  35

  35. CHECK FOR OPEN IN CAN MAIN BUS LINES (BRAKE ACTUATOR ASSEMBLY) 
    1. Reconnect the A92 No. 12 global CAN junction connector.
    2. Disconnect the A39 brake actuator assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY1179769Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Brake Actuator Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A39-16 (CA2H) - A39-17 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (BRAKE ACTUATOR ASSEMBLY - NO. 12 GLOBAL CAN JUNCTION CONNECTOR) 

Diesel-Data.com