CAN COMMUNICATION SYSTEM Open in CAN Main Wire

DTC Code DTC Name
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 or 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

C221191E02

CAUTION / NOTICE / HINT

Tip:

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 hereClick hereClick here

      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

        Click hereClick hereClick hereClick here

      Result

      Result

      NEXT
    NEXT

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

    1. C220697C28

      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

      *b

      Front view of DLC3

      Disconnect the G79 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

      G79-5 (CANH) - G37-6 (CANH)

      Engine switch off

      Below 1 Ω

      G79-16 (CANL) - G37-14 (CANL)

      Engine switch off

      Below 1 Ω

      Result

      Result

      OK

      NG
    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. C220696C13

      *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

      G79-1 (CANH) - G79-12 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

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

    1. C220696C14

      *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

      G79-6 (CANH) - G79-17 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      OK

      NG
    OK

    REPLACE NO. 3 JUNCTION CONNECTOR

    NG

  5. CONNECT CONNECTOR

    1. Reconnect the G79 No. 3 junction connector connector.

      Result

      Result

      NEXT
    NEXT

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

    1. C220696C19

      *a

      Rear view of wire harness connector

      (to No. 4 Junction Connector)

      Disconnect the A59 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

      A59-10 (CANH) - A59-21 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

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

    1. C220696C20

      *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

      A59-9 (CANH) - A59-20 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      OK

      NG
    OK

    REPLACE NO. 4 JUNCTION CONNECTOR

    NG

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

  8. CONNECT CONNECTOR

    1. Reconnect the G79 No. 3 junction connector connector.

      Result

      Result

      NEXT
    NEXT

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

    1. C220696C15

      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

      Disconnect the G85 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

      G85-1 (CANH) - G85-12 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

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

    1. C220696C16

      *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

      G85-6 (CANH) - G85-17 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      OK

      NG
    OK

    REPLACE NO. 2 JUNCTION CONNECTOR

    NG

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

  11. CONNECT CONNECTOR

    1. Reconnect the A59 No. 4 junction connector connector.

      Result

      Result

      NEXT
    NEXT

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

    1. C221258C03

      *a

      Rear view of wire harness connector

      (to Combination Meter Assembly)

      Disconnect the G3 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

      G3-40 (CANH) - G3-39 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      OK

      NG
    OK

    REPLACE COMBINATION METER ASSEMBLY

    Click here

    NG

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

  13. CONNECT CONNECTOR

    1. Reconnect the G85 No. 2 junction connector connector.

      Result

      Result

      NEXT
    NEXT

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

    1. C220696C17

      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

      Disconnect the G82 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

      G82-6 (CANH) - G82-17 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      OK

      NG
    NG

    CONNECT CONNECTORClick here

    OK

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

    1. C220696C18

      *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

      G82-1 (CANH) - G82-12 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      OK

      NG
    OK

    REPLACE NO. 1 JUNCTION CONNECTOR

    NG

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

  16. CONNECT CONNECTOR

    1. Reconnect the G82 No. 1 junction connector connector.

      Result

      Result

      NEXT
    NEXT

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

    1. C215892C07

      *A

      for 1UR-FE

      *B

      for 1GR-FE

      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the G45*1 or G107*2 ECM connector.

      *1: for 1UR-FE

      *2: for 1GR-FE

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

      Standard Resistance

      Table 1. for 1UR-FE

      Tester Connection

      Switch Condition

      Specified Condition

      G45-32 (CANH) - G45-31 (CANL)

      Engine switch off

      108 to 132 Ω
      Table 2. for 1GR-FE

      Tester Connection

      Switch Condition

      Specified Condition

      G107-32 (CANH) - G107-31 (CANL)

      Engine switch off

      108 to 132 Ω

      Result

      Result

      Proceed to

      OK (for 1UR-FE)

      A

      OK (for 1GR-FE)

      B

      NG

      C
    A

    REPLACE ECM

    Click here

    B

    REPLACE ECM

    Click here

    C

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