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Home >> Lexus >> 2024 >> GX 550 Premium+ >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Circuit Tests (1 Of 3) & Diagnostic Codes >> Can Communication System >> DTC U0076-88: Control Module Communication Bus "D" Off Bus Off; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1171-87: ECB Communication Error (CAN) (CL-Bus) Communication is Lost [12/2023 - ] >> Procedure
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DTC U0076-88: Control Module Communication Bus "D" Off Bus Off; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1171-87: ECB Communication Error (CAN) (CL-Bus) Communication is Lost [12/2023 - ]: Procedure

  1. RECONFIRM DTC OUTPUT 
    1. Check for DTCs.

      Powertrain > Engine > Trouble Codes 

      Chassis > Adaptive Variable Suspension System > Trouble Codes 

      Chassis > Trailer Brake Controller > Trouble Codes 

      Chassis > Brake/EPB > Trouble Codes 

      Display on GTS / Output DTC Pattern
      Pattern 1 Pattern 2 Pattern 3 Pattern 4
      Engine U0129-87 ◦ - - ◦
      Adaptive Variable Suspension System U1171-87 - ◦ - ◦
      Trailer Brake Controller U0076-88 - - ◦ -
      U1171-87 - - ◦ ◦
      Brake/EPB U115C-87 ◦ - - ◦

      Result

      Result  Proceed to 
      Pattern 1 A
      Pattern 2 B
      Pattern 3 C
      Pattern 4 D
      Other Pattern E

    Result: 

    B 

    See step  3

    Result: 

    C 

    See step  4

    Result: 

    D 

    See step  5

    Result: 

    E 

    See step  6

    Result: 

    A 

    See step  2

  2. CHECK FOR OPEN IN CAN BUS WIRE (ECM BRANCH WIRE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the A2 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A2-16 (CACH) - A2-15 (CACL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR 

  3. CHECK FOR OPEN IN CAN BUS WIRE (ABSORBER CONTROL ECU BRANCH WIRE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the K25 absorber control ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K25-19 (CA2H) - K25-18 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR 

  4. CHECK FOR OPEN IN CAN BUS WIRE (BRAKE CONTROL WITH BRACKET RELAY BRANCH WIRE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the A2 brake control with bracket relay connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A2-40 (CA2H) - A2-39 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE CONTROL WITH BRACKET RELAY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR 

  5. CHECK FOR OPEN IN CAN BUS WIRE (BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) MAIN WIRE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the A25 brake actuator assembly (skid control ECU) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A25-16 (CA2H) - A25-17 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR 

  6. CHECK FOR OPEN IN CAN BUS WIRE 
    NOTE:

    Before measuring the resistance of the CAN bus, turn the ignition 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.

    HINT: 

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

    1. Disconnect the cable from the negative (-) battery terminal.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E55-10 (CAVH) - E55-11 (CAVL) Cable disconnected from negative (-) battery terminal Below 70 Ω
      GTY1210721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU (Network Gateway ECU))

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  49

    Result: 

    OK 

    See step  7

  7. CHECK FOR SHORT IN CAN BUS WIRES 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E55-10 (CAVH) - E55-11 (CAVL) Cable disconnected from negative (-) battery terminal 54 Ω or higher
      GTY1210721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU (Network Gateway ECU))

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  36

    Result: 

    OK 

    See step  8

  8. CHECK FOR SHORT TO B+ IN CAN BUS WIRE 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E55-10 (CAVH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E55-11 (CAVL) - Positive (+) battery terminal
      GTY1210721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU (Network Gateway ECU))

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  23

    Result: 

    OK 

    See step  9

  9. CHECK FOR SHORT TO GND IN CAN BUS WIRE 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E55-10 (CAVH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E55-11 (CAVL) - Body ground
      GTY1210721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU (Network Gateway ECU))

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    See step  10

  10. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - NO. 7 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Disconnect the E137 No. 11 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-8 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E137-19 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  14

    Result: 

    OK 

    See step  11

  11. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-11 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E137-22 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  21

    Result: 

    OK 

    See step  12

  12. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Adaptive Variable Suspension System A
      w/o Adaptive Variable Suspension System B

    Result: 

    B 

    REPLACE NO. 11 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    A 

    See step  13

  13. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-9 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E137-20 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 11 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  22

  14. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Disconnect the E133 No. 7 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-7 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E133-18 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  15

  15. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-11 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E133-22 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  18

    Result: 

    OK 

    See step  16

  16. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-10 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E133-21 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  19

    Result: 

    OK 

    See step  17

  17. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE OONTROL WITH BRACKET RELAY) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-8 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E133-19 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 7 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  20

  18. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 
    1. Disconnect the A25 brake actuator assembly (skid control ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-11 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E133-22 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 

  19. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A2 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-10 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E133-21 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - ECM) 

  20. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE OONTROL WITH BRACKET RELAY) 
    1. Disconnect the A2 brake control with bracket relay connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-8 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E133-19 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE CONTROL WITH BRACKET RELAY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE OONTROL WITH BRACKET RELAY) 

  21. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the E55 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
      E137-11 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E137-22 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 

  22. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Disconnect the K25 absorber control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-9 (CANH) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher
      E137-20 (CANL) - Body ground Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 

  23. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - NO. 7 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Disconnect the E137 No. 11 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-8 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E137-19 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  27

    Result: 

    OK 

    See step  24

  24. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-11 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E137-22 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  34

    Result: 

    OK 

    See step  25

  25. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Adaptive Variable Suspension System A
      w/o Adaptive Variable Suspension System B

    Result: 

    B 

    REPLACE NO. 11 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    A 

    See step  26

  26. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-9 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E137-20 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 11 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  35

  27. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Disconnect the E133 No. 11 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-7 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E133-18 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  28

  28. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-11 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E133-22 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  31

    Result: 

    OK 

    See step  29

  29. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-10 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E133-21 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  32

    Result: 

    OK 

    See step  30

  30. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE OONTROL WITH BRACKET RELAY) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-8 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E133-19 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 7 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  33

  31. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 
    1. Disconnect the A25 brake actuator assembly (skid control ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-11 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E133-22 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 

  32. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A2 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-10 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E133-21 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - ECM) 

  33. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE OONTROL WITH BRACKET RELAY) 
    1. Disconnect the A2 brake control with bracket relay connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-8 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E133-19 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE CONTROL WITH BRACKET RELAY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE OONTROL WITH BRACKET RELAY) 

  34. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the E55 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
      E137-11 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E137-22 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 

  35. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Disconnect the K25 absorber control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-9 (CANH) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      E137-20 (CANL) - Positive (+) battery terminal Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 

  36. CHECK FOR SHORT IN CAN BUS WIRES (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - NO. 7 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Disconnect the E137 No. 11 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-8 (CANH) - E137-19 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  40

    Result: 

    OK 

    See step  37

  37. CHECK FOR SHORT IN CAN BUS WIRES (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-11 (CANH) - E137-22 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  47

    Result: 

    OK 

    See step  38

  38. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Adaptive Variable Suspension System A
      w/o Adaptive Variable Suspension System B

    Result: 

    B 

    REPLACE NO. 11 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    A 

    See step  39

  39. CHECK FOR SHORT IN CAN BUS WIRES (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-9 (CANH) - E137-20 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 11 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  48

  40. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Disconnect the E133 No. 7 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-7 (CANH) - E133-18 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  41

  41. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-11 (CANH) - E133-22 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  44

    Result: 

    OK 

    See step  42

  42. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-10 (CANH) - E133-21 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  45

    Result: 

    OK 

    See step  43

  43. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE OONTROL WITH BRACKET RELAY) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-8 (CANH) - E133-19 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 7 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  46

  44. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 
    1. Disconnect the A25 brake actuator assembly (skid control ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-11 (CANH) - E133-22 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 

  45. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A2 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-10 (CANH) - E133-21 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - ECM) 

  46. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE OONTROL WITH BRACKET RELAY) 
    1. Disconnect the A2 brake control with bracket relay connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-8 (CANH) - E133-19 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE CONTROL WITH BRACKET RELAY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE OONTROL WITH BRACKET RELAY) 

  47. CHECK FOR SHORT IN CAN BUS WIRES (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Disconnect the E55 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
      E137-11 (CANH) - E137-22 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 

  48. CHECK FOR SHORT IN CAN BUS WIRES (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Disconnect the K25 absorber control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-9 (CANH) - E137-20 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 

  49. CHECK FOR OPEN IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - NO. 7 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Disconnect the E137 No. 11 global CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-8 (CANH) - E137-19 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  51

    Result: 

    OK 

    See step  50

  50. CHECK FOR OPEN IN CAN BUS WIRE (NO. 11 GLOBAL CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E137-11 (CANH) - E137-22 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 11 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  54

  51. CHECK FOR OPEN IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Reconnect the E137 No. 11 global CAN junction connector.
    2. Disconnect the E133 No. 7 global CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-7 (CANH) - E133-18 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  52

  52. CHECK FOR OPEN IN CAN BUS WIRE (NO. 7 GLOBAL CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E133-11 (CANH) - E133-22 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 7 GLOBAL CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  53

  53. CHECK FOR OPEN IN CAN BUS WIRE (BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) - NO. 7 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Reconnect the E133 No. 7 global CAN junction connector.
    2. Disconnect the A25 brake actuator assembly (skid control ECU) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A25-16 (CA2H) - A25-17 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) - NO. 7 GLOBAL CAN JUNCTION CONNECTOR) 

  54. CHECK FOR OPEN IN CAN BUS WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 
    1. Reconnect the E137 No. 11 global CAN junction connector.
    2. Disconnect the E55 central gateway ECU (network gateway ECU) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E55-10 (CAVH) - E55-11 (CAVL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 11 GLOBAL CAN JUNCTION CONNECTOR) 

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