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CAN COMMUNICATION SYSTEM (for RHD) 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 lines 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 and +B

  • ECM

  • Center airbag sensor assembly*1

  • Headlight swivel ECU assembly*2

  • Multi-media module receiver assembly*3

  • Air conditioning amplifier assembly

  • Network gateway ECU

  • Main body ECU (cowl side junction block LH)

  • Combination meter assembly

  • No. 1 junction connector

  • No. 2 junction connector

  • No. 3 junction connector

A015DFPE01
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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 the CAN branch wire.

      CAUTION:

      For vehicles with an SRS system:

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


    1. A0157YPE07

      Disconnect the E75 No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E22-6 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E22-14 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 1. Text in Illustration
      *a Front view of DLC3

  4. Click here

    CONNECT CONNECTOR


    1. Reconnect the E75 No. 3 junction connector.


  5. Click here

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


    1. A0157YPE07

      Disconnect the E72 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
      E22-6 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E22-14 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 2. Text in Illustration
      *a Front view of DLC3

  6. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

    Note:

    For vehicles without an airbag system, go to "Check for Short to B+ in CAN Bus Wire (No. 1 Junction Connector - Main Body ECU)".


    1. A0157V1E02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E72-4 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E72-15 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 3. Text in Illustration
      *a

      Rear view of wire harness connector

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

  7. Click here

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


    1. A0157V1E01

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E72-3 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E72-14 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 4. Text in Illustration
      *a

      Rear view of wire harness connector

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

  8. Click here

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


    1. A0157V1E03

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E72-2 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E72-13 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 5. Text in Illustration
      *a

      Rear view of wire harness connector

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

  9. Click here

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


    1. A0157V1E02

      Disconnect the E47 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
      E72-4 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E72-15 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 6. Text in Illustration
      *a

      Rear view of wire harness connector

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

  10. Click here

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


    1. A0157V1E01

      Disconnect the E3 main body ECU (cowl side junction block LH) connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E72-3 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E72-14 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 7. Text in Illustration
      *a

      Rear view of wire harness connector

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

  11. Click here

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


    1. A0157V1E03

      Disconnect the A52 ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E72-2 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E72-13 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 8. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)
      *b Front view of DLC3
      Table 9. Result
      Result Proceed to
      OK (for 1GR-FE) A
      OK (for 1UR-FE) B
      OK (for 1VD-FTV) C
      NG D

  12. Click here

    CONNECT CONNECTOR


    1. Reconnect the E72 No. 1 junction connector.


  13. Click here

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


    1. A0157V1E53

      Disconnect the E69 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
      E69-4 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E69-15 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 10. Text in Illustration
      *a

      Rear view of wire harness connector

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

  14. Click here

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


    1. A0157YPE07

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E22-6 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E22-14 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 11. Text in Illustration
      *a Front view of DLC3

  15. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - MULTI-MEDIA MODULE RECEIVER ASSEMBLY)

    Note:

    For vehicles without an navigation system, go to "Check for Short to B+ in CAN Bus Wire (No. 2 Junction Connector - Air Conditioning Amplifier)".


    1. A0157V1E05

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E69-2 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E69-13 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 12. Text in Illustration
      *a

      Rear view of wire harness connector

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

  16. Click here

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


    1. A0157V1E07

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E69-5 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E69-16 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 13. Text in Illustration
      *a

      Rear view of wire harness connector

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

  17. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - HEADLIGHT SWIVEL ECU ASSEMBLY)

    Note:

    For vehicles without an dynamic headlight auto leveling, go to "Check for Short to B+ in CAN Bus Wire (No. 2 Junction Connector - Network Gateway ECU)".


    1. A0157V1E54

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E69-7 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E69-18 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 14. Text in Illustration
      *a

      Rear view of wire harness connector

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

  18. Click here

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


    1. A0157V1E06

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E69-3 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E69-14 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 15. Text in Illustration
      *a

      Rear view of wire harness connector

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

  19. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (MULTI-MEDIA MODULE RECEIVER ASSEMBLY)


    1. A0157V1E05

      Disconnect the F77 multi-media module receiver assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E69-2 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E69-13 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 16. Text in Illustration
      *a

      Rear view of wire harness connector

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

  20. Click here

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


    1. A0157V1E07

      Disconnect the E35*1 or E81*2 air conditioning amplifier connector.


      • *1: w/ Rear Air Conditioning System

      • *2: w/o Rear Air Conditioning System

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E69-5 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E69-16 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 17. Text in Illustration
      *a

      Rear view of wire harness connector

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

  21. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (HEADLIGHT SWIVEL ECU ASSEMBLY)


    1. A0157V1E54

      Disconnect the E101 headlight swivel ECU assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E69-7 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E69-18 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 18. Text in Illustration
      *a

      Rear view of wire harness connector

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

  22. Click here

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


    1. A0157V1E06

      Disconnect the E31 network gateway ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E69-3 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E69-14 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 19. Text in Illustration
      *a

      Rear view of wire harness connector

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

  23. Click here

    CONNECT CONNECTOR


    1. Reconnect the E69 No. 2 junction connector.


  24. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)


    1. A0157V1E08

      Disconnect the E75 No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E75-1 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E75-12 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 20. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)
      *b Front view of DLC3

  25. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)


    1. A0157V1E10

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E75-3 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E75-14 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 21. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)
      *b Front view of DLC3

  26. Click here

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


    1. A0157V1E10

      Disconnect the E7 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
      E75-3 (CANH) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      E75-14 (CANL) - E22-16 (BAT) Ignition switch off 6 kΩ or higher
      Table 22. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)
      *b Front view of DLC3
      Table 23. Result
      Result Proceed to
      OK (w/ Multi-information Display) A
      OK (w/o Multi-information Display) B
      NG C

  27. Click here

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

  28. Click here

    REPLACE NO. 1 JUNCTION CONNECTOR

  29. Click here

    REPLACE CENTER AIRBAG SENSOR ASSEMBLYClick here

  30. Click here

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

  31. Click here

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

  32. Click here

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

  33. Click here

    REPLACE ECMClick here

  34. Click here

    REPLACE ECMClick here

  35. Click here

    REPLACE ECMClick here

  36. Click here

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

  37. Click here

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

  38. Click here

    REPLACE NO. 2 JUNCTION CONNECTOR

  39. Click here

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLYClick here

  40. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MULTI-MEDIA MODULE RECEIVER ASSEMBLY (CANH, CANL)

  41. Click here

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLYClick here

  42. Click here

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

  43. Click here

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLYClick here

  44. Click here

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO HEADLIGHT SWIVEL ECU ASSEMBLY (MPX1, MPX2)

  45. Click here

    REPLACE NETWORK GATEWAY ECUClick here

  46. Click here

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

  47. Click here

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

  48. Click here

    REPLACE NO. 3 JUNCTION CONNECTOR

  49. Click here

    REPLACE COMBINATION METER ASSEMBLYClick here

  50. Click here

    REPLACE COMBINATION METER ASSEMBLYClick here

  51. Click here

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