CAN COMMUNICATION SYSTEM (w/ VSC) Open in CAN Main Bus Line

DESCRIPTION

There may be an open circuit in the CAN main wire and/or the DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 70 Ω or higher.

Symptom Trouble Area
Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is 70 Ω or higher.

  • CAN main wire and connector

  • No. 1 junction connector

  • No. 2 junction connector

  • No. 3 junction connector

  • ECM

  • DLC3 branch wire or connector

WIRING DIAGRAM

A01DWR5E06

INSPECTION PROCEDURE

Tech Tips

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

PROCEDURE


  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the 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 from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected Click here.


    NEXT

  2. CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - DLC3)


    1. A01E15BE01

      Disconnect the J49 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
      J49-2 (CANH) - D1-6 (CANH) Ignition switch off Below 1 Ω
      J49-1 (CANL) - D1-14 (CANL) Ignition switch off Below 1 Ω

    NG

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

    OK

  3. CONNECT CONNECTOR


    1. Reconnect the J49 No. 3 junction connector.


    NEXT

  4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)


    1. A01DX88E05

      Disconnect the J54 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
      J54-4 (CANH) - J54-1 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

  5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - ECM)


    1. A01DX88E06

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J54-12 (CANH) - J54-6 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

    REPLACE NO. 1 JUNCTION CONNECTOR

  6. CONNECT CONNECTOR


    1. Reconnect the J54 No. 1 junction connector.


    NEXT

  7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)


    1. A01DVOAE01

      Disconnect the J59 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
      J59-6 (CANH) - J59-17 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

  8. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)


    1. A01DVOAE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J59-5 (CANH) - J59-16 (CANL) Ignition switch off 108 to 132 Ω

    NG

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

    OK

    REPLACE NO. 2 JUNCTION CONNECTOR

  9. CONNECT CONNECTOR


    1. Reconnect the J59 No. 2 junction connector.


    NEXT

  10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)


    1. A01DXHLE05

      Disconnect the J50 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
      J50-2 (CANH) - J50-1 (CANL) Ignition switch off 108 to 132 Ω

    NG

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

    OK

    REPLACE NO. 3 JUNCTION CONNECTOR

  11. CONNECT CONNECTOR


    1. Reconnect the J54 No. 1 junction connector.


    NEXT

  12. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 1 JUNCTION CONNECTOR)


    1. for 1KD-FTV, 2KD-FTV (w/ DPF):


      1. Disconnect the E30 ECM connector.

        A01DX67E01

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        E30-35 (CANH) - E30-36 (CANL) Ignition switch off 108 to 132 Ω

    2. for 1KD-FTV, 2KD-FTV (w/o DPF):


      1. Disconnect the E6 ECM connector.

        A01DYRZE03

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        E6-24 (CANH) - E6-23 (CANL) Ignition switch off 108 to 132 Ω

    3. for 1GR-FE:


      1. Disconnect the E13 ECM connector.

        A01E0X7E01

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

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        E13-33 (CANH) - E13-34 (CANL) Ignition switch off 108 to 132 Ω
      Result
      Result Proceed to
      OK (for 1KD-FTV) A
      OK (for 2KD-FTV) B
      OK (for 1GR-FE) C
      NG D

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    D

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 1 JUNCTION CONNECTOR)

    A

    REPLACE ECM Click here