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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 119 (Can Communication System - Circuit Tests (1 Of 4) & Diagnostic Codes) >> CAN COMMUNICATION SYSTEM (for 1Motor-HEV Model) >> DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U111A-00: Lost Communication with ECM/PCM "A" (ch2); DTC U1150-00: Lost Communication with Hybrid Powertrain Control Module (ch2); DTC U1150-87: Lost Communication with Hybrid/EV Powertrain Control Module (ch2) Missing Message; DTC U1159-87: Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message; DTC U11B7-00: Lost Communication with TCM (ch4) (System 2) Missing Message; DTC U11B7-87: Lost Communication with TCM (ch4) Missing Message; DTC U11BC-87: Lost Communication with Hybrid/EV Powertrain Control Module (ch6) Missing Message; DTC U11BE-87: Lost Communication with ECM/PCM "A" (ch7) Missing Message [09/2023 - ] >> Procedure

DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U111A-00: Lost Communication with ECM/PCM "A" (ch2); DTC U1150-00: Lost Communication with Hybrid Powertrain Control Module (ch2); DTC U1150-87: Lost Communication with Hybrid/EV Powertrain Control Module (ch2) Missing Message; DTC U1159-87: Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message; DTC U11B7-00: Lost Communication with TCM (ch4) (System 2) Missing Message; DTC U11B7-87: Lost Communication with TCM (ch4) Missing Message; DTC U11BC-87: Lost Communication with Hybrid/EV Powertrain Control Module (ch6) Missing Message; DTC U11BE-87: Lost Communication with ECM/PCM "A" (ch7) Missing Message [09/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR OPEN IN CAN MAIN BUS LINES 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1239207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      D44-50 (CA3P) - D44-49 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal Below 70 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  41

    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.
      GTY1239207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      D44-50 (CA3P) - D44-49 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 54 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  29

    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.
      GTY1239207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      D44-50 (CA3P) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      D44-49 (CA3N) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  17

    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.
      GTY1239207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      D44-50 (CA3P) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      D44-49 (CA3N) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    INSPECT FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2023 - ] 

    Result: 

    NG 

    See step  5

  5. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Disconnect the B70 No. 14 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-2 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B70-6 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  8

    Result: 

    OK 

    See step  6

  6. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - NO. 4 CAN JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-1 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B70-5 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  10

    Result: 

    OK 

    See step  7

  7. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - TCM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-3 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B70-7 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 14 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  9

  8. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Disconnect the D44 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-2 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B70-6 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 

  9. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - TCM) 
    1. Disconnect the C25 TCM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-3 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B70-7 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE TCM. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 14 CAN JUNCTION CONNECTOR - TCM) 

  10. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR) 
    1. Disconnect the B67 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
      B67-2 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B67-6 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  11

  11. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-4 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B67-8 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  14

    Result: 

    OK 

    See step  12

  12. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-3 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B67-7 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  15

    Result: 

    OK 

    See step  13

  13. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-1 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B67-5 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 4 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  16

  14. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the B77 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-4 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B67-8 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - ECM) 

  15. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) 
    1. Disconnect the B35 No. 1 skid control ECU (brake booster with master cylinder assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-3 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B67-7 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY). Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) 

  16. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 
    1. Disconnect the B34 No. 2 skid control ECU (brake actuator assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-1 (CANH) - Body ground Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B67-5 (CANL) - Body ground

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 

  17. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Disconnect the B70 No. 14 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-2 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B70-6 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  20

    Result: 

    OK 

    See step  18

  18. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - NO. 4 CAN JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-1 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B70-5 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  22

    Result: 

    OK 

    See step  19

  19. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - TCM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-3 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B70-7 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 14 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  21

  20. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Disconnect the D44 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-2 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B70-6 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 

  21. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 14 CAN JUNCTION CONNECTOR - TCM) 
    1. Disconnect the C25 TCM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-3 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B70-7 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE TCM. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 14 CAN JUNCTION CONNECTOR - TCM) 

  22. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR) 
    1. Disconnect the B67 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
      B67-2 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B67-6 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  23

  23. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-4 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B67-8 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  26

    Result: 

    OK 

    See step  24

  24. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-3 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B67-7 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  27

    Result: 

    OK 

    See step  25

  25. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-1 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B67-5 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 4 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  28

  26. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the B77 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-4 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B67-8 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - ECM) 

  27. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) 
    1. Disconnect the B35 No. 1 skid control ECU (brake booster with master cylinder assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-3 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B67-7 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY). Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) 

  28. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 
    1. Disconnect the B34 No. 2 skid control ECU (brake actuator assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-1 (CANH) - Battery positive terminal Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B67-5 (CANL) - Battery positive terminal

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 

  29. CHECK FOR SHORT IN CAN BUS LINES (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Disconnect the B70 No. 14 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-2 (CANH) - B70-6 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  32

    Result: 

    OK 

    See step  30

  30. CHECK FOR SHORT IN CAN BUS LINES (NO. 14 CAN JUNCTION CONNECTOR - NO. 4 CAN JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-1 (CANH) - B70-5 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  34

    Result: 

    OK 

    See step  31

  31. CHECK FOR SHORT IN CAN BUS LINES (NO. 14 CAN JUNCTION CONNECTOR - TCM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-3 (CANH) - B70-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 14 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  33

  32. CHECK FOR SHORT IN CAN BUS LINES (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Disconnect the D44 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-2 (CANH) - B70-6 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 

  33. CHECK FOR SHORT IN CAN BUS LINES (NO. 14 CAN JUNCTION CONNECTOR - TCM) 
    1. Disconnect the C25 TCM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-3 (CANH) - B70-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE TCM. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 14 CAN JUNCTION CONNECTOR - TCM) 

  34. CHECK FOR SHORT IN CAN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR) 
    1. Reconnect the B70 No. 14 CAN junction connector.
    2. Disconnect the B67 No. 4 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-2 (CANH) - B67-6 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  35

  35. CHECK FOR SHORT IN CAN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-4 (CANH) - B67-8 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  38

    Result: 

    OK 

    See step  36

  36. CHECK FOR SHORT IN CAN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-3 (CANH) - B67-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  39

    Result: 

    OK 

    See step  37

  37. CHECK FOR SHORT IN CAN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-1 (CANH) - B67-5 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 4 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  40

  38. CHECK FOR SHORT IN CAN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the B77 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-4 (CANH) - B67-8 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - ECM) 

  39. CHECK FOR SHORT IN CAN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) 
    1. Disconnect the B35 No. 1 skid control ECU (brake booster with master cylinder assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-3 (CANH) - B67-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY). Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) 

  40. CHECK FOR SHORT IN CAN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 
    1. Disconnect the B34 No. 2 skid control ECU (brake actuator assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-1 (CANH) - B67-5 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 

  41. CHECK FOR OPEN IN CAN MAIN BUS LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Disconnect the D44 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D44-50 (CA3P) - D44-49 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    See step  42

  42. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 
    1. Reconnect the D44 hybrid vehicle control ECU assembly connector.
    2. Disconnect the B70 No. 14 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-2 (CANH) - B70-6 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 14 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU ASSEMBLY) 

    Result: 

    OK 

    See step  43

  43. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 14 CAN JUNCTION CONNECTOR - NO. 4 CAN JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B70-1 (CANH) - B70-5 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 14 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  44

  44. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR) 
    1. Reconnect the B70 No. 14 CAN junction connector.
    2. Disconnect the B67 No. 4 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-2 (CANH) - B67-6 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  45

  45. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B67-1 (CANH) - B67-5 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 4 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  46

  46. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 
    1. Reconnect the B67 No. 4 CAN junction connector.
    2. Disconnect the B34 No. 2 skid control ECU (brake actuator assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B34-16 (CA2H) - B34-17 (CA2L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - NO. 4 CAN JUNCTION CONNECTOR) 

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