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CAN COMMUNICATION SYSTEM Short to B+ in CAN Bus Line

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DTC Code DTC Name
  Short to B+ in CAN Bus Line
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DESCRIPTION

There may be a short circuit between the CAN bus line and B+ when the resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3 is below 6 kΩ.

Symptom Trouble Area
The resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3 is below 6 kΩ.

  • Short between CAN bus lines

  • ECM

  • Brake actuator assembly (VSC ECU)*1

  • Brake actuator assembly (ABS ECU)*2

  • Certification ECU*3

  • Air conditioning amplifier assembly*4

  • Spiral cable sub-assembly (steering angle sensor)*1

  • Yaw rate sensor*1

  • Main body ECU (instrument panel junction block assembly)

  • Center airbag sensor assembly

  • Power management control ECU*3

  • Power steering ECU assembly

  • Combination meter assembly

  • No. 1 junction connector

  • No. 2 junction connector

A01INJKE02
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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 SHORT TO B+ IN CAN BUS WIRE (DLC3 BRANCH WIRE)


    1. A01ISU0E45

      Disconnect the H88 No. 2 junction connector 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) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H16-14 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ 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 connector.


  5. Click here

    CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR SIDE)


    1. A01ISU0E45

      Disconnect the A50 No. 1 junction connector 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) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H16-14 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 2. Text in Illustration
      *1 Front view of DLC3

  6. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - BRAKE ACTUATOR)


    1. A01IN2JE52

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A50-8 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      A50-19 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 3. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 1 Junction Connector)
      *2 Front view of DLC3

  7. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - ECM)


    1. A01IN2JE53

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A50-10 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      A50-21 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 4. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 1 Junction Connector)
      *2 Front view of DLC3

  8. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - BRAKE ACTUATOR)


    1. A01IN2JE54

      Disconnect the A53*1 brake actuator assembly (ABS ECU) or A52*2 or A54*3 brake actuator assembly (VSC ECU) connector.


      • *1: w/o Vehicle Stability Control System

      • *2: w/ Vehicle Stability Control System (for AD Series Engine)

      • *3: w/ Vehicle Stability Control System (for ZR Series Engine)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A50-8 (CANH) - H16-16 (BATT) Ignition switch off 6 kΩ or higher
      A50-19 (CANL) - H16-16 (BATT) Ignition switch off 6 kΩ or higher
      Table 5. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 1 Junction Connector)
      *2 Front view of DLC3
      Table 6. Result
      Result Proceed to
      OK (w/ Vehicle Stability Control System) A
      OK (w/o Vehicle Stability Control System) B
      NG C

  9. Click here

    CHECK SHORT TO B+ IN CAN BUS WIRE (ECM)


    1. A01IN2JE53

      Disconnect the A51 ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A50-10 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      A50-21 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 7. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 1 Junction Connector)
      *2 Front view of DLC3
      Table 8. 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

  10. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)


    1. A01IN2JE79

      Disconnect the H88 No. 2 junction connector 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) - H16-16 (BATT) Ignition switch off 6 kΩ or higher
      H88-21 (CANL) - H16-16 (BATT) Ignition switch off 6 kΩ or higher
      Table 9. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  11. Click here

    CONNECT CONNECTOR


    1. Reconnect the A50 No. 1 junction connector connector.


  12. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (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)".


    1. A01IN2JE55

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-1 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-12 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 10. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  13. Click here

    CHECK SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - CERTIFICATION ECU)


    1. A01IN2JE56

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-2 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-13 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 11. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  14. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER)

    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)".


    1. A01IN2JE57

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-4 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-15 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 12. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  15. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - POWER STEERING ECU)


    1. A01IN2JE58

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-3 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-14 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 13. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  16. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - SPIRAL CABLE)

    Note:

    For vehicles without a vehicle stability control system, go to "Check for Short in CAN Bus Wires (No. 2 Junction Connector - Main Body ECU)".


    1. A01IN2JE59

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-5 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-16 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 14. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  17. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - YAW RATE SENSOR)


    1. A01IN2JE60

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-6 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-17 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 15. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  18. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - MAIN BODY ECU)


    1. A01IN2JE61

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-8 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-19 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 16. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  19. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR)


    1. A01IN2JE62

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-11 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-22 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 17. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  20. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - COMBINATION METER)


    1. A01IN2JE63

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-9 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-20 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 18. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  21. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector connector.


  22. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU)


    1. A01IN2JE55

      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
      H88-1 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-12 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 19. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3
      Table 20. Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

  23. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector connector.


  24. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CERTIFICATION ECU)


    1. A01IN2JE56

      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
      H88-2 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-13 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 21. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  25. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector connector.


  26. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER)


    1. A01IN2JE57

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


      • *1: for Automatic Air Conditioning System

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

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-4 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-15 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 22. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  27. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector connector.


  28. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (POWER STEERING ECU)


    1. A01IN2JE58

      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
      H88-3 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-14 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 23. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  29. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector connector.


  30. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (SPIRAL CABLE)


    1. A01IN2JE59

      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
      H88-5 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-16 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 24. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  31. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector connector.


  32. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (YAW RATE SENSOR)


    1. A01IN2JE60

      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
      H88-6 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-17 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 25. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  33. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector connector.


  34. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (MAIN BODY ECU)


    1. A01IN2JE61

      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
      H88-8 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-19 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 26. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  35. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector connector.


  36. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTER AIRBAG SENSOR)


    1. A01IN2JE62

      Disconnect the H19 center airbag sensor assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H88-11 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-22 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 27. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  37. Click here

    CONNECT CONNECTOR


    1. Reconnect the H88 No. 2 junction connector connector.


  38. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (COMBINATION METER)


    1. A01IN2JE63

      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
      H88-9 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      H88-20 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 28. Text in Illustration
      *1

      Rear view of wire harness connector

      (to No. 2 Junction Connector)
      *2 Front view of DLC3

  39. Click here

    REPLACE COMBINATION METER ASSEMBLYClick here

  40. Click here

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

  41. Click here

    REPAIR OR REPLACE NO. 1 JUNCTION CONNECTOR

  42. Click here

    REPLACE BRAKE ACTUATOR ASSEMBLY (ABS ECU)Click here

  43. Click here

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

  44. Click here

    REPLACE BRAKE ACTUATOR ASSEMBLY (VSC ECU)Click here

  45. Click here

    REPLACE ECMClick here

  46. Click here

    REPLACE ECMClick here

  47. Click here

    REPLACE ECMClick here

  48. Click here

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

  49. Click here

    REPLACE ECMClick here

  50. Click here

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

  51. Click here

    REPAIR OR REPLACE NO. 2 JUNCTION CONNECTOR

  52. Click here

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

  53. Click here

    REPLACE POWER MANAGEMENT CONTROL ECUClick here

  54. Click here

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

  55. Click here

    REPLACE CERTIFICATION ECU

  56. Click here

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

  57. Click here

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

  58. Click here

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

  59. Click here

    REPLACE POWER STEERING ECU ASSEMBLYClick here

  60. Click here

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

  61. Click here

    REPLACE SPIRAL CABLE SUB-ASSEMBLYClick here

  62. Click here

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

  63. Click here

    REPLACE YAW RATE SENSORClick here

  64. Click here

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

  65. Click here

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

  66. Click here

    REPLACE CENTER AIRBAG SENSOR ASSEMBLYClick here

  67. Click here

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

  68. Click here

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

  69. Click here

    REPLACE POWER MANAGEMENT CONTROL ECUClick here