CAN COMMUNICATION SYSTEM (for RHD 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 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or higher.

Symptom Trouble Area
The resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or higher.

  • CAN main wire and connector

  • ECM*1

  • Combination meter assembly

  • No. 1 junction connector

  • No. 2 junction connector

  • No. 3 junction connector

  • No. 4 junction connector*2

  • DLC3 branch wire or connector

WIRING DIAGRAM

A00JXRWE01

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


      • 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. 2 JUNCTION CONNECTOR - DLC3)


    1. A00K0PYE94
      Text in Illustration
      *a

      Rear view of wire harness connector

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

      Disconnect the G132 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
      G132-4 (CANH) - G48-6 (CANH) Ignition switch off Below 1 Ω
      G132-15 (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 MAIN WIRE (NO. 2 JUNCTION CONNECTOR - ECM OR NO. 4 JUNCTION CONNECTOR)


    1. A00JX4ME12
      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
      G132-1 (CANH) - G132-12 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

  4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)


    1. A00JX4ME63
      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
      G132-8 (CANH) - G132-19 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

    REPLACE NO. 2 JUNCTION CONNECTOR

  5. CONNECT CONNECTOR


    1. Reconnect the G132 No. 2 junction connector connector.


    NEXT

  6. CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - ECM OR NO. 4 JUNCTION CONNECTOR)


    1. A00JX4ME64
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

      Disconnect the G134 No. 3 junction connector connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G134-2 (CANH) - G134-13 (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

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


    1. A00JX4ME65
      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
      G134-1 (CANH) - G134-12 (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

  8. CONNECT CONNECTOR


    1. Reconnect the G134 No. 3 junction connector connector.


    NEXT

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


    1. A00JY2EE11
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the G60 ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G60-34 (CANH) - G60-33 (CANL) Ignition switch off 108 to 132 Ω

    NG

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

    OK

    REPLACE ECM Click here

  10. CONNECT CONNECTOR


    1. Reconnect the G134 No. 3 junction connector connector.


    NEXT

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


    1. A00K23GE09
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 4 Junction Connector)

      Disconnect the G101 No. 4 junction connector connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G101-3 (CANH) - G101-2 (CANL) Ignition switch off 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO NO. 4 JUNCTION CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

    OK

    REPLACE NO. 4 JUNCTION CONNECTOR

  12. CONNECT CONNECTOR


    1. Reconnect the G132 No. 2 junction connector connector.


    NEXT

  13. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)


    1. A00JX4ME66
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

      Disconnect the A72 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
      A72-10 (CANH) - A72-21 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

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


    1. A00JX4ME67
      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
      A72-9 (CANH) - A72-20 (CANL) Ignition switch off 108 to 132 Ω

    NG

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

    OK

    REPLACE NO. 1 JUNCTION CONNECTOR

  15. CONNECT CONNECTOR


    1. Reconnect the A72 No. 1 junction connector connector.


    NEXT

  16. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER ASSEMBLY - NO. 1 JUNCTION CONNECTOR)


    1. A00JXHZE11
      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

    NG

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

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here