CAN COMMUNICATION SYSTEM(for LHD without Entry and Start System) Open in CAN Main Wire

DESCRIPTION

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

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

  • CAN main wire and connector

  • ECM

  • No. 1 junction connector

  • No. 2 junction connector

  • No. 3 junction connector

  • No. 4 junction connector*1

  • No. 5 junction connector*2

  • Combination meter assembly

  • DLC3 CAN branch wire or connector

WIRING DIAGRAM

A01XFK5E02

CAUTION / NOTICE / HINT

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 CAN main wire and the CAN branch wire.

      CAUTION:

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

      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.

      • When disconnecting the cable, 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. A01XELZE01
      Text in Illustration
      *a

      Rear view of wire harness connector

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

      Disconnect the G94 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
      G94-5 (CANH) - G48-6 (CANH) Ignition switch off Below 1 Ω
      G94-16 (CANL) - G48-14 (CANL) Ignition switch off Below 1 Ω

    NG

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

    OK

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


    1. A01XLB2E01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G94-1 (CANH) - G94-12 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

  4. CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)


    1. A01XLZHE01
      Text in Illustration
      *A for 1KD-FTV
      *B for 2TR-FE, 5L-E
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

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

      Standard Resistance
      for 1KD-FTV
      Tester Connection Switch Condition Specified Condition
      G94-6 (CANH) - G94-17 (CANL) Ignition switch off 108 to 132 Ω
      for 2TR-FE, 5L-E
      Tester Connection Switch Condition Specified Condition
      G94-2 (CANH) - G94-13 (CANL) Ignition switch off 108 to 132 Ω
      Result
      Result Proceed to
      OK A
      NG (for 1KD-FTV) B
      NG (for 2TR-FE, 5L-E) C

    A

    REPLACE NO. 3 JUNCTION CONNECTOR

    B

    CONNECT CONNECTOR Click here

    C

    CONNECT CONNECTOR Click here

  5. CONNECT CONNECTOR


    1. Reconnect the G94 No. 3 junction connector.


    NEXT

  6. CHECK FOR OPEN IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - ECM)


    1. A01XG6QE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

      Disconnect the G100 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
      G100-1 (CANH) - G100-12 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

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


    1. A01XHQYE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G100-6 (CANH) - G100-17 (CANL) Ignition switch off 108 to 132 Ω

    OK

    REPLACE NO. 2 JUNCTION CONNECTOR

    NG

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

  8. CONNECT CONNECTOR


    1. Reconnect the G100 No. 2 junction connector.


    NEXT

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


    1. A01XL2FE08
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

      Disconnect the G193 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
      G193-6 (CANH) - G193-17 (CANL) Ignition switch off 108 to 132 Ω
      Result
      Result Proceed to
      OK A
      NG (for 2TR-FE, 5L-E) B
      NG (for 1KD-FTV) C

    B

    CONNECT CONNECTOR Click here

    C

    CONNECT CONNECTOR Click here

    A

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


    1. A01XHWAE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G193-1 (CANH) - G193-12 (CANL) Ignition switch off 108 to 132 Ω

    OK

    REPLACE NO. 1 JUNCTION CONNECTOR

    NG

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

  11. CONNECT CONNECTOR


    1. Reconnect the G193 No. 1 junction connector.


    NEXT

  12. CHECK FOR OPEN IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR - ECM)


    1. A01XLNQE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 4 Junction Connector)

      Disconnect the A72 No. 4 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A72-10 (CANH) - A72-21 (CANL) Ignition switch off 108 to 132 Ω
      Result
      Result Proceed to
      OK A
      NG (for 2TR-FE) B
      NG (for 5L-E) C

    B

    CONNECT CONNECTOR Click here

    C

    CONNECT CONNECTOR Click here

    A

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


    1. A01XDH7E01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 4 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A72-9 (CANH) - A72-20 (CANL) Ignition switch off 108 to 132 Ω

    OK

    REPLACE NO. 4 JUNCTION CONNECTOR

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

  14. CONNECT CONNECTOR


    1. Reconnect the G193 No. 1 junction connector.


    NEXT

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


    1. A01XHB3E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the G58 ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G58-35 (CANH) - G58-36 (CANL) Ignition switch off 108 to 132 Ω

    OK

    REPLACE ECM Click here

    NG

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

  16. CONNECT CONNECTOR


    1. Reconnect the A72 No. 4 junction connector.


    NEXT

  17. CHECK FOR OPEN IN CAN BUS WIRE (ECM - NO. 4 JUNCTION CONNECTOR)


    1. A01XLSCE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the G181 ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G181-13 (CANH) - G181-14 (CANL) Ignition switch off 108 to 132 Ω

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 4 JUNCTION CONNECTOR)

  18. CONNECT CONNECTOR


    1. Reconnect the A72 No. 4 junction connector.


    NEXT

  19. CHECK FOR OPEN IN CAN BUS WIRE (ECM - NO. 4 JUNCTION CONNECTOR)


    1. A01XH2XE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the G183 ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G183-25 (CANH) - G183-31 (CANL) Ignition switch off 108 to 132 Ω

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 4 JUNCTION CONNECTOR)

  20. CONNECT CONNECTOR


    1. Reconnect the G94 No. 3 junction connector.


    NEXT

  21. CHECK FOR OPEN IN CAN BUS WIRE (NO. 5 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)


    1. A01XKXOE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 5 Junction Connector)

      Disconnect the A73 No. 5 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A73-10 (CANH) - A73-21 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

  22. CHECK FOR OPEN IN CAN BUS WIRE (NO. 5 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)


    1. A01XJMRE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 5 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A73-9 (CANH) - A73-20 (CANL) Ignition switch off 108 to 132 Ω

    OK

    REPLACE NO. 5 JUNCTION CONNECTOR

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 5 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

  23. CONNECT CONNECTOR


    1. Reconnect the A73 No. 5 junction connector.


    NEXT

  24. CHECK FOR OPEN IN CAN BUS WIRE (COMBINATION METER ASSEMBLY - NO. 5 JUNCTION CONNECTOR)


    1. A01XIY0E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Combination Meter Assembly)

      Disconnect the G6 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
      G6-40 (CANH) - G6-39 (CANL) Ignition switch off 108 to 132 Ω

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (COMBINATION METER ASSEMBLY - NO. 5 JUNCTION CONNECTOR)

  25. CONNECT CONNECTOR


    1. Reconnect the G94 No. 3 junction connector.


    NEXT

  26. CHECK FOR OPEN IN CAN BUS WIRE (COMBINATION METER ASSEMBLY - NO. 3 JUNCTION CONNECTOR)


    1. A01XIY0E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Combination Meter Assembly)

      Disconnect the G6 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
      G6-40 (CANH) - G6-39 (CANL) Ignition switch off 108 to 132 Ω

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (COMBINATION METER ASSEMBLY - NO. 3 JUNCTION CONNECTOR)