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CAN COMMUNICATION SYSTEM Short in CAN Bus Lines

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DTC Code DTC Name
  Short in CAN Bus Lines
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DESCRIPTION

There may be a short circuit between the CAN bus lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 53 Ω.

Symptom Trouble Area
The resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 53 Ω.

  • Short between CAN bus lines

  • ECM

  • Brake actuator assembly (VSC ECU)

  • Certification ECU*1

  • Air conditioning amplifier assembly*2

  • Spiral cable sub-assembly (steering angle sensor)

  • Yaw rate sensor

  • Main body ECU (instrument panel junction block assembly)

  • Center airbag sensor assembly

  • Power management control ECU*1

  • Power steering ECU assembly

  • Radio and display receiver assembly*3

  • Combination meter assembly

  • No. 1 junction connector

  • No. 2 junction connector

A01INJKE03
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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

For vehicles with an entry and start system:

Before replacing the certification ECU, refer to the entry and start system (for Entry Function) (Click here).

Tip:

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

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PROCEDURE


  1. Click here

    PRECAUTION

    Note:

    After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).


  2. Click here

    DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and CAN branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).


  3. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (DLC3 CAN BRANCH WIRE)


    1. A01ISU0E44

      Disconnect the H88 No. 2 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H16-6 (CANH) - H16-14 (CANL) Ignition switch off 200 Ω or higher
      Table 1. Text in Illustration
      *1 Front view of DLC3

  4. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  5. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR SIDE)


    1. A01ISU0E44

      Disconnect the A50 No. 1 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H16-6 (CANH) - H16-14 (CANL) Ignition switch off 108 to 132 Ω
      Table 2. Text in Illustration
      *1 Front view of DLC3

  6. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)


    1. A01IQK6E39

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A50-8 (CANH) - A50-19 (CANL) Ignition switch off 200 Ω or higher
      Table 3. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

  7. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ECM)


    1. A01IQK6E40

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A50-10 (CANH) - A50-21 (CANL) Ignition switch off 108 to 132 Ω
      Table 4. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

  8. Click here

    CONNECT CONNECTOR


    1. Reconnect the A50 No. 1 junction connector.


  9. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (BRAKE ACTUATOR ASSEMBLY)


    1. A01IQ6CE04

      Disconnect the A52*1 or A54*2 brake actuator assembly (VSC ECU) connector.


      • *1: for AD Series Engine

      • *2: for ZR Series Engine

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

      Standard Resistance
      Table 5. for AD Series Engine
      Tester Connection Switch Condition Specified Condition
      A52-35 (CANH) - A52-14 (CANL) Ignition switch off 54 to 69 Ω
      Table 6. for ZR Series Engine
      Tester Connection Switch Condition Specified Condition
      A54-35 (CANH) - A54-14 (CANL) Ignition switch off 54 to 69 Ω
      Table 7. Text in Illustration
      *1 for AD Series Engine
      *2 for ZR Series Engine
      *3

      Front view of wire harness connector

      (to Brake Actuator Assembly)

  10. Click here

    CONNECT CONNECTOR


    1. Reconnect the A50 No. 1 junction connector.


  11. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (ECM)


    1. A01ISXDE07

      Disconnect the A51 ECM connector.

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

      Standard Resistance
      Table 8. for AD Series Engine
      Tester Connection Switch Condition Specified Condition
      A51-7 (CANH) - A51-6 (CANL) Ignition switch off 108 to 132 Ω
      Table 9. for ZR Series Engine
      Tester Connection Switch Condition Specified Condition
      A51-8 (CANH) - A51-9 (CANL) Ignition switch off 108 to 132 Ω
      Table 10. Text in Illustration
      *1

      Front view of wire harness connector

      (to ECM)
      *2 for AD Series Engine
      *3 for ZR Series Engine
      Table 11. Result
      Result Proceed to
      OK (for 1AD-FTV) A
      OK (for 2AD-FHV) B
      OK (for 1ZR-FAE) C
      OK (for 2ZR-FAE) D
      NG E

  12. Click here

    CONNECT CONNECTOR


    1. Reconnect the A50 No. 1 junction connector.


  13. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)


    1. A01IQK6E41

      Disconnect the H88 No. 2 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-10 (CANH) - H88-21 (CANL) Ignition switch off 108 to 132 Ω
      Table 12. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 junction connector)

  14. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU)

    Note:

    For vehicles without an entry and start system, go to "Check for Short in CAN Bus Wires (No. 2 Junction Connector - Air Conditioning Amplifier Assembly)".


    1. A01IQK6E42

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-1 (CANH) - H88-12 (CANL) Ignition switch off 200 Ω or higher
      Table 13. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  15. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - CERTIFICATION ECU)


    1. A01IQK6E43

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-2 (CANH) - H88-13 (CANL) Ignition switch off 200 Ω or higher
      Table 14. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  16. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

    Note:

    For vehicles with an entry and start system, go to "Check for Short in CAN Bus Wires (No. 2 Junction Connector - Power Steering ECU Assembly)".


    1. A01IQK6E43

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-2 (CANH) - H88-13 (CANL) Ignition switch off 200 Ω or higher
      Table 15. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  17. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)


    1. A01IQK6E45

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-3 (CANH) - H88-14 (CANL) Ignition switch off 200 Ω or higher
      Table 16. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  18. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - RADIO AND DISPLAY RECEIVER ASSEMBLY)

    Note:

    For vehicles without a radio and display receiver type, go to "Check for Short in CAN Bus Wires (No. 2 Junction Connector - Spiral Cable Sub-assembly)".


    1. A01IQK6E44

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-4 (CANH) - H88-15 (CANL) Ignition switch off 200 Ω or higher
      Table 17. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  19. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - SPIRAL CABLE SUB-ASSEMBLY)


    1. A01IQK6E46

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-5 (CANH) - H88-16 (CANL) Ignition switch off 200 Ω or higher
      Table 18. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  20. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - YAW RATE SENSOR)


    1. A01IQK6E47

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-6 (CANH) - H88-17 (CANL) Ignition switch off 200 Ω or higher
      Table 19. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  21. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - MAIN BODY ECU)


    1. A01IQK6E49

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-8 (CANH) - H88-19 (CANL) Ignition switch off 200 Ω or higher
      Table 20. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  22. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)


    1. A01IQK6E48

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-11 (CANH) - H88-22 (CANL) Ignition switch off 200 Ω or higher
      Table 21. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  23. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)


    1. A01IQK6E50

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

      Standard Resistance
      Table 22. Result
      Tester Connection Switch Condition Specified Condition
      H88-9 (CANH) - H88-20 (CANL) Ignition switch off 108 to 132 Ω
      Table 23. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  24. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  25. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (POWER MANAGEMENT CONTROL ECU)


    1. A01IOSCE10

      Disconnect the H71 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H71-14 (CA1H) - H71-13 (CA1L) Ignition switch off 54 to 69 Ω
      Table 24. Text in Illustration
      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)
      Table 25. Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

  26. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  27. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (CERTIFICATION ECU)


    1. A01ISYUE04

      Disconnect the H51 certification ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H51-9 (CANH) - H51-10 (CANL) Ignition switch off 54 to 69 Ω
      Table 26. Text in Illustration
      *1

      Rear view of wire harness connector

      (to Certification ECU)

  28. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  29. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER ASSEMBLY)


    1. A01IOPRE01

      Disconnect the H46*1 or H9*2 air conditioning amplifier assembly connector.


      • *1: for Automatic Air Conditioning System

      • *2: for Manual Air Conditioning System or w/o Air Conditioning System

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

      Standard Resistance
      Table 27. for Automatic Air Conditioning System
      Tester Connection Switch Condition Specified Condition
      H46-11 (CANH) - H46-12 (CANL) Ignition switch off 54 to 69 Ω
      Table 28. for Manual Air Conditioning System or w/o Air Conditioning System
      Tester Connection Switch Condition Specified Condition
      H9-2 (CANH) - H9-3 (CANL) Ignition switch off 54 to 69 Ω
      Table 29. Text in Illustration
      *1 for Automatic Air Conditioning System
      *2 for Manual Air Conditioning System or w/o Air Conditioning System
      *3

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

  30. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  31. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (POWER STEERING ECU ASSEMBLY)


    1. A01IRTBE03

      Disconnect the H49 power steering ECU assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H49-2 (CANH) - H49-8 (CANL) Ignition switch off 54 to 69 Ω
      Table 30. Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Steering ECU Assembly)

  32. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  33. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (RADIO AND DISPLAY RECEIVER ASSEMBLY)


    1. A01ISS8E03

      Disconnect the H105 radio and display receiver assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H105-9 (CANH) - H105-10 (CANL) Ignition switch off 54 to 69 Ω
      Table 31. Text in Illustration
      *1

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

  34. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  35. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (SPIRAL CABLE SUB-ASSEMBLY)


    1. A01IPSCE05

      Disconnect the H69 spiral cable sub-assembly (steering angle sensor) connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H69-4 (CANH) - H69-3 (CANL) Ignition switch off 54 to 69 Ω
      Table 32. Text in Illustration
      *1

      Rear view of wire harness connector

      (to Spiral Cable Sub-assembly)

  36. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  37. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (YAW RATE SENSOR)


    1. A01IPT7E08

      Disconnect the H68 yaw rate sensor connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H68-2 (CANH) - H68-3 (CANL) Ignition switch off 54 to 69 Ω
      Table 33. Text in Illustration
      *1

      Front view of wire harness connector

      (to Yaw Rate Sensor)

  38. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  39. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (MAIN BODY ECU)


    1. A01IN0UE03

      Disconnect the H81 main body ECU (instrument panel junction block assembly) connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H81-15 (CANH) - H81-16 (CANL) Ignition switch off 54 to 69 Ω
      Table 34. Text in Illustration
      *1

      Rear view of wire harness connector

      (to Main Body ECU)

  40. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  41. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (CENTER AIRBAG SENSOR ASSEMBLY)


    1. A01IRRWE03

      Disconnect the H19 center airbag sensor assembly connector (Click here).

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H19-13 (CANH) - H19-22 (CANL) Ignition switch off 54 to 69 Ω
      Table 35. Text in Illustration
      *1

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

  42. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector.


  43. Click here

    CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER ASSEMBLY)


    1. A01IQXRE05

      Disconnect the H62 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H62-22 (CANH) - H62-23 (CANL) Ignition switch off 108 to 132 Ω
      Table 36. Text in Illustration
      *1

      Front view of wire harness connector

      (to Combination Meter Assembly)

  44. Click here

    REPLACE COMBINATION METER ASSEMBLYClick here

  45. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL)

  46. Click here

    REPLACE NO. 1 JUNCTION CONNECTOR

  47. Click here

    REPLACE BRAKE ACTUATOR ASSEMBLY (VSC ECU)Click here

  48. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BRAKE ACTUATOR ASSEMBLY (CANH, CANL)

  49. Click here

    REPLACE ECMClick here

  50. Click here

    REPLACE ECMClick here

  51. Click here

    REPLACE ECMClick here

  52. Click here

    REPLACE ECMClick here

  53. Click here

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CANH, CANL)

  54. Click here

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

  55. Click here

    REPLACE NO. 2 JUNCTION CONNECTOR

  56. Click here

    REPLACE POWER MANAGEMENT CONTROL ECUClick here

  57. Click here

    REPLACE POWER MANAGEMENT CONTROL ECUClick here

  58. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER MANAGEMENT CONTROL ECU (CA1H, CA1L)

  59. Click here

    REPLACE CERTIFICATION ECU

  60. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CERTIFICATION ECU (CANH, CANL)

  61. Click here

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

  62. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CANH, CANL)

  63. Click here

    REPLACE POWER STEERING ECU ASSEMBLYClick here

  64. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (CANH, CANL)

  65. Click here

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLYClick here

  66. Click here

    REPLACE CAN BRANCH WIRE CONNECTED TO RADIO AND DISPLAY RECEIVER ASSEMBLY (CANH, CANL)

  67. Click here

    REPLACE SPIRAL CABLE SUB-ASSEMBLYClick here

  68. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SPIRAL CABLE SUB-ASSEMBLY (CANH, CANL)

  69. Click here

    REPLACE YAW RATE SENSORClick here

  70. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO YAW RATE SENSOR (CANH, CANL)

  71. Click here

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

  72. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (CANH, CANL)

  73. Click here

    REPLACE CENTER AIRBAG SENSOR ASSEMBLYClick here

  74. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (CANH, CANL)

  75. Click here

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL)