CAN COMMUNICATION SYSTEM Check Sub Bus Wire Harness

DESCRIPTION

Symptom Trouble Area
All the DTCs related to the sub bus are stored.

  • Sub bus circuit

  • ECM CAN main wire or connector

  • Turbocharger sub-assembly CAN branch wire or connector

  • EGR valve assembly CAN branch wire or connector

  • ECM

  • Turbocharger sub-assembly

  • EGR valve assembly

  • No. 7 junction connector

  • No. 8 junction connector

  • No. 9 junction connector

WIRING DIAGRAM

A01CHNBE03

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. PRECAUTION

    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.


    NEXT

  2. 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

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


    NEXT

  3. CAN BUS WIRE (CHECK CAN MAIN WIRE FOR DISCONNECTION, CHECK BUS LINE FOR SHORT)


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

      A01CGXVE03
      Text in Illustration
      *a

      Component with harness connected

      (ECM)

      		 - -
      Standard Resistance
      Tester Connection Switch Condition Specified Condition Resistance: Malfunction
      E36-12 (CAN+) - E36-6 (CAN-) Ignition switch off 54 to 69 Ω Below 53 Ω: Short in line
      E36-12 (CAN+) - E36-6 (CAN-) Ignition switch off 54 to 69 Ω Higher than 70 Ω: Open in CAN main bus line
      E36-12 (CAN+) - E39-23 (BATT) Ignition switch off 6 kΩ or higher Below 6 kΩ: +B short
      E36-6 (CAN-) - E39-23 (BATT) Ignition switch off 6 kΩ or higher Below 6 kΩ: +B short
      E36-12 (CAN+) - E38-1 (E1) Ignition switch off 200 Ω or higher Below 200 Ω: Ground short
      E36-6 (CAN-) - E38-1 (E1) Ignition switch off 200 Ω or higher Below 200 Ω: Ground short
      Result
      Result Proceed to

      OK


      • Open in CAN main bus line

      		 A

      OK


      • Short in line

      • +B short

      • GND short

      		 B
      NG C

    B

    CHECK FOR SHORT IN CAN BUS WIRE (NO. 8 JUNCTION CONNECTOR SIDE) Click here

    C

    CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND) Click here

    A

  4. CHECK FOR OPEN IN CAN BUS WIRE (NO. 7 JUNCTION CONNECTOR - NO. 9 JUNCTION CONNECTOR)


    1. A01CIQSE29
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 7 Junction Connector)

      Disconnect the No. 7 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J60-4 (CANH) - J60-9 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

  5. CHECK FOR OPEN IN CAN BUS WIRE (NO. 7 JUNCTION CONNECTOR - ECM)


    1. A01CIQSE30
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 7 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J60-3 (CANH) - J60-8 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

    REPLACE NO. 7 JUNCTION CONNECTOR

  6. CONNECT CONNECTOR


    1. Reconnect the J60 No. 7 junction connector.


    NEXT

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


    1. A01CIVKE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E36-12 (CAN+) - E36-6 (CAN-) Ignition switch off 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 7 JUNCTION CONNECTOR)

    OK

    REPLACE ECM Click here

  8. CONNECT CONNECTOR


    1. Reconnect the J60 No. 7 junction connector.


    NEXT

  9. CHECK FOR OPEN IN CAN BUS WIRE (NO. 8 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)


    1. A01CIQSE31
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 8 Junction Connector)

      Disconnect the No. 8 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J59-4 (CANH) - J59-9 (CANL) Ignition switch off 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 8 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

    OK

  10. CHECK FOR OPEN IN CAN BUS WIRE (NO. 8 JUNCTION CONNECTOR - NO. 9 JUNCTION CONNECTOR)


    1. A01CIQSE32
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 8 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J59-5 (CANH) - J59-10 (CANL) Ignition switch off 108 to 132 Ω

    NG

    CONNECT CONNECTOR Click here

    OK

    REPLACE NO. 8 JUNCTION CONNECTOR

  11. CONNECT CONNECTOR


    1. Reconnect the J59 No. 8 junction connector.


    NEXT

  12. CHECK FOR OPEN IN CAN BUS WIRE (NO. 9 JUNCTION CONNECTOR - NO. 8 JUNCTION CONNECTOR)


    1. A01CIOME06
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 9 Junction Connector)

      Disconnect the No. 9 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J85-2 (+) - J85-1 (-) Ignition switch off 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 9 JUNCTION CONNECTOR - NO. 8 JUNCTION CONNECTOR)

    OK

    REPLACE NO. 9 JUNCTION CONNECTOR

  13. CHECK FOR SHORT IN CAN BUS WIRE (NO. 8 JUNCTION CONNECTOR SIDE)


    1. Disconnect the J59 No. 8 junction connector.

      A01CGXVE03
      Text in Illustration
      *a

      Component with harness connected

      (ECM)

      		 - -

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E36-12 (CAN+) - E36-6 (CAN-) Ignition switch off 108 to 132 Ω
      E36-12 (CAN+) - E38-1 (E1) Ignition switch off 200 Ω or higher
      E36-6 (CAN-) - E38-1 (E1) Ignition switch off 200 Ω or higher
      E36-12 (CAN+) - E39-23 (BATT) Ignition switch off 6 kΩ or higher
      E36-6 (CAN-) - E39-23 (BATT) Ignition switch off 6 kΩ or higher

    NG

    CONNECT CONNECTOR Click here

    OK

  14. CHECK FOR SHORT IN CAN BUS WIRE (NO. 8 JUNCTION CONNECTOR - EGR VALVE ASSEMBLY)


    1. A01CHO7E34
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 8 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
      J59-3 (CANH) - J59-8 (CANL) Ignition switch off 200 Ω or higher
      J59-3 (CANH) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J59-8 (CANL) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J59-3 (CANH) - D34-16 (BAT) Ignition switch off 6 kΩ or higher
      J59-8 (CANL) - D34-16 (BAT) Ignition switch off 6 kΩ or higher

    NG

    CONNECT CONNECTOR Click here

    OK

  15. CHECK FOR SHORT IN CAN BUS WIRE (NO. 8 JUNCTION CONNECTOR - NO. 9 JUNCTION CONNECTOR)


    1. A01CHO7E35
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 8 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
      J59-5 (CANH) - J59-10 (CANL) Ignition switch off 108 to 132 Ω
      J59-5 (CANH) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J59-10 (CANL) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J59-5 (CANH) - D34-16 (BAT) Ignition switch off 6 kΩ or higher
      J59-10 (CANL) - D34-16 (BAT) Ignition switch off 6 kΩ or higher

    NG

    CONNECT CONNECTOR Click here

    OK

    REPLACE NO. 8 JUNCTION CONNECTOR

  16. CONNECT CONNECTOR


    1. Reconnect the J59 No. 8 junction connector.


    NEXT

  17. CHECK FOR SHORT IN CAN BUS WIRE (EGR VALVE ASSEMBLY)


    1. A01CI87E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to EGR Valve Assembly)
      *b Front view of DLC3

      Disconnect the EGR valve assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E31-5 (CANH) - E31-2 (CANL) Ignition switch off 54 to 69 Ω
      E31-5 (CANH) - D34-4 (CG) Ignition switch off 200 Ω or higher
      E31-2 (CANL) - D34-4 (CG) Ignition switch off 200 Ω or higher
      E31-5 (CANH) - D34-16 (BAT) Ignition switch off 6 kΩ or higher
      E31-2 (CANL) - D34-16 (BAT) Ignition switch off 6 kΩ or higher

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO EGR VALVE ASSEMBLY (CANH, CANL)

    OK

    REPLACE EGR VALVE ASSEMBLY Click here

  18. CONNECT CONNECTOR


    1. Reconnect the J59 No. 8 junction connector.


    NEXT

  19. CHECK FOR SHORT IN CAN BUS WIRE (NO. 9 JUNCTION CONNECTOR)


    1. A01CHOJE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 9 Junction Connector)
      *b Front view of DLC3

      Disconnect the No. 9 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J85-2 (+) - J85-1 (-) Ignition switch off 108 to 132 Ω
      J85-2 (+) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J85-1 (-) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J85-2 (+) - D34-16 (BAT) Ignition switch off 6 kΩ or higher
      J85-1 (-) - D34-16 (BAT) Ignition switch off 6 kΩ or higher

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 9 JUNCTION CONNECTOR - NO. 8 JUNCTION CONNECTOR)

    OK

    REPLACE NO. 9 JUNCTION CONNECTOR

  20. CONNECT CONNECTOR


    1. Reconnect the J59 No. 8 junction connector.


    NEXT

  21. CHECK FOR SHORT IN CAN BUS WIRE (NO. 7 JUNCTION CONNECTOR - NO. 8 JUNCTION CONNECTOR)


    1. A01CHO7E36
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 7 Junction Connector)
      *b Front view of DLC3

      Disconnect the No. 7 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      J60-4 (CANH) - J60-9 (CANL) Ignition switch off 108 to 132 Ω
      J60-4 (CANH) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J60-9 (CANL) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J60-4 (CANH) - D34-16 (BAT) Ignition switch off 6 kΩ or higher
      J60-9 (CANL) - D34-16 (BAT) Ignition switch off 6 kΩ or higher

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 JUNCTION CONNECTOR - NO. 8 JUNCTION CONNECTOR)

    OK

  22. CHECK FOR SHORT IN CAN BUS WIRE (NO. 7 JUNCTION CONNECTOR - TURBOCHARGER SUB-ASSEMBLY)


    1. A01CHO7E37
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 7 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
      J60-5 (CANH) - J60-10 (CANL) Ignition switch off 200 Ω or higher
      J60-5 (CANH) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J60-10 (CANL) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J60-5 (CANH) - D34-16 (BAT) Ignition switch off 6 kΩ or higher
      J60-10 (CANL) - D34-16 (BAT) Ignition switch off 6 kΩ or higher

    NG

    CONNECT CONNECTOR Click here

    OK

  23. CHECK FOR SHORT IN CAN BUS WIRE (NO. 7 JUNCTION CONNECTOR - ECM)


    1. A01CHO7E38
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 7 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
      J60-3 (CANH) - J60-8 (CANL) Ignition switch off 108 to 132 Ω
      J60-3 (CANH) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J60-8 (CANL) - D34-4 (CG) Ignition switch off 200 Ω or higher
      J60-3 (CANH) - D34-16 (BAT) Ignition switch off 6 kΩ or higher
      J60-8 (CANL) - D34-16 (BAT) Ignition switch off 6 kΩ or higher

    NG

    CONNECT CONNECTOR Click here

    OK

    REPLACE NO. 7 JUNCTION CONNECTOR

  24. CONNECT CONNECTOR


    1. Reconnect the J60 No. 7 junction connector.


    NEXT

  25. CHECK FOR SHORT IN CAN BUS WIRE (TURBOCHARGER SUB-ASSEMBLY)


    1. A01CHW4E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Turbocharger Sub-assembly)
      *b Front view of DLC3

      Disconnect the turbocharger sub-assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      T13-4 (CANH) - T13-3 (CANL) Ignition switch off 54 to 69 Ω
      T13-4 (CANH) - D34-4 (CG) Ignition switch off 200 Ω or higher
      T13-3 (CANL) - D34-4 (CG) Ignition switch off 200 Ω or higher
      T13-4 (CANH) - D34-16 (BAT) Ignition switch off 6 kΩ or higher
      T13-3 (CANL) - D34-16 (BAT) Ignition switch off 6 kΩ or higher

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO TURBOCHARGER SUB-ASSEMBLY (CANH, CANL)

    OK

    REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

  26. CONNECT CONNECTOR


    1. Reconnect the J60 No. 7 junction connector.


    NEXT

  27. CHECK FOR SHORT IN CAN BUS WIRE (ECM)


    1. A01CHADE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)
      *b Front view of DLC3

      Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E36-12 (CAN+) - E36-6 (CAN-) Ignition switch off 108 to 132 Ω
      E36-12 (CAN+) - D34-4 (CG) Ignition switch off 200 Ω or higher
      E36-6 (CAN-) - D34-4 (CG) Ignition switch off 200 Ω or higher
      E36-12 (CAN+) - D34-16 (BAT) Ignition switch off 6 kΩ or higher
      E36-6 (CAN-) - D34-16 (BAT) Ignition switch off 6 kΩ or higher

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (CAN+, CAN-)

    OK

    REPLACE ECM Click here

  28. CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND)


    1. Connect the cable to the negative (-) battery terminal.

      A01CH38E04
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      		 - -

      Note

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

    2. Disconnect the ECM connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E38-1 (E1) - Body ground Always Below 1 Ω
      E38-11 (E01) - Body ground Always Below 1 Ω
      E38-12 (E02) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E39-23 (BATT) - Body ground Always 20 to 28 V
      E40-24 (IGSW) - Body ground Ignition switch ON 20 to 28 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  29. CHECK ECM POWER SOURCE CIRCUIT


    1. Check the ECM power source circuit Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

    REPLACE ECM Click here