CAN COMMUNICATION SYSTEM (for LHD with 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

  • No. 1 junction connector

  • No. 2 junction connector

  • No. 3 junction connector

  • No. 4 junction connector

  • ECM

  • Combination meter assembly

  • DLC3 branch wire or connector

WIRING DIAGRAM

A00JW1NE01

INSPECTION PROCEDURE

Tech Tips

Operating the engine 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 engine 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. Disconnect the G94 No. 3 junction connector connector.

    2. A00K0PYE52
      Text in Illustration
      *a

      Rear view of wire harness connector

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

      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) Engine switch off Below 1 Ω
      G94-16 (CANL) - G48-14 (CANL) Engine 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. 3 JUNCTION CONNECTOR - ECM)


    1. A00JX4ME11
      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) Engine switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

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


    1. A00JX4ME13
      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
      G94-6 (CANH) - G94-17 (CANL) Engine switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

    REPLACE NO. 3 JUNCTION CONNECTOR

  5. CONNECT CONNECTOR


    1. Reconnect the G94 No. 3 junction connector connector.


    NEXT

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


    1. A00JX4ME83
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

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

    NG

    CONNECT CONNECTOR Click here

    OK

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


    1. A00JX4ME14
      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) Engine switch off 108 to 132 Ω

    NG

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

    OK

    REPLACE NO. 2 JUNCTION CONNECTOR

  8. CONNECT CONNECTOR


    1. Reconnect the G100 No. 2 junction connector connector.


    NEXT

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


    1. A00JX4ME15
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

      Disconnect the G97 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
      G97-6 (CANH) - G97-17 (CANL) Engine switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

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


    1. A00JX4ME16
      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
      G97-1 (CANH) - G97-12 (CANL) Engine 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

  11. CONNECT CONNECTOR


    1. Reconnect the G97 No. 1 junction connector connector.


    NEXT

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


    1. A00JY2EE08
      Text in Illustration
      *A for 1GR-FE
      *B for 1KD-FTV
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the G56*1 or G58*2 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

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

      Standard Resistance
      for 1GR-FE
      Tester Connection Switch Condition Specified Condition
      G56-32 (CANH) - G56-31 (CANL) Engine switch off 108 to 132 Ω
      for 1KD-FTV
      Tester Connection Switch Condition Specified Condition
      G58-35 (CANH) - G58-36 (CANL) Engine switch off 108 to 132 Ω
      Result
      Result Proceed to
      OK (for 1GR-FE) A
      OK (for 1KD-FTV) B
      NG C

    B

    REPLACE ECM Click here

    C

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

    A

    REPLACE ECM Click here

  13. CONNECT CONNECTOR


    1. Reconnect the G94 No. 3 junction connector connector.


    NEXT

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


    1. A00JX4ME17
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 4 Junction Connector)

      Disconnect the A73 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
      A73-10 (CANH) - A73-21 (CANL) Engine switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

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


    1. A00JX4ME18
      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
      A73-9 (CANH) - A73-20 (CANL) Engine switch off 108 to 132 Ω

    NG

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

    OK

    REPLACE NO. 4 JUNCTION CONNECTOR

  16. CONNECT CONNECTOR


    1. Reconnect the A73 No. 4 junction connector connector.


    NEXT

  17. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER - NO. 4 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) Engine switch off 108 to 132 Ω

    NG

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

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here