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CAN COMMUNICATION SYSTEM Check CAN Bus Line for Short to GND (RHD Models)

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DTC Code DTC Name
  Check CAN Bus Line for Short to GND (RHD Models)
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DESCRIPTION

There may be a short circuit between the CAN bus line and GND when there is no resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3.

Symptom Trouble Area
No resistance exists between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of DLC3.

  • Short to GND in CAN bus wire

  • Skid control ECU

  • Power steering ECU

  • Steering angle sensor

  • Yaw rate sensor

  • ECM

  • Center airbag sensor assembly

  • Air conditioning amplifier

  • Combination meter ECU

  • Main body ECU

  • CAN junction connector CTR

  • CAN junction connector RH
A017CQGE01
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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

  • Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.

  • After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.

  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If the doors need to be opened in order to check the connectors, open the doors and leave them open.

Tip:

  • Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes the resistance variation.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below will help determine the cause of the malfunction.

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PROCEDURE


  1. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN JUNCTION CONNECTOR CTR)


    1. Turn the ignition switch off.

    2. Disconnect the CAN junction connector CTR.

    3. A017BAHE27

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

      Standard resistance
      Tester Connection Wiring Color Connect to Condition Specified Condition
      D47-1 (CANH) - D43-4 (CG) SB - B CAN junction connector RH Ignition switch off 200 Ω or higher
      D47-12 (CANL) - D43-4 (CG) W - B CAN junction connector RH Ignition switch off 200 Ω or higher
      D47-4 (CANH) - D43-4 (CG) L - B DLC3 Ignition switch off 200 Ω or higher
      D47-15 (CANL) - D43-4 (CG) W - B DLC3 Ignition switch off 200 Ω or higher
      D47-5 (CANH) - D43-4 (CG) R - B ECM Ignition switch off 200 Ω or higher
      D47-16 (CANL) - D43-4 (CG) W - B ECM Ignition switch off 200 Ω or higher
      Result
      Result Proceed to
      OK A
      NG (DLC3 branch wire) B
      NG (ECM main wire) C
      NG (CAN junction connector RH main wire) D

  2. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN JUNCTION CONNECTOR CTR)


    1. A017BAHE28

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

      Standard resistance
      Tester Connection Wiring Color Connect to Condition Specified Condition
      D47-2 (CANH) - D43-4 (CG) G - B Yaw rate sensor Ignition switch off 200 Ω or higher
      D47-13 (CANL) - D43-4 (CG) W - B Yaw rate sensor Ignition switch off 200 Ω or higher
      D47-3 (CANH) - D43-4 (CG) Y - B Center airbag sensor assembly Ignition switch off 200 Ω or higher
      D47-14 (CANL) - D43-4 (CG) W - B Center airbag sensor assembly Ignition switch off 200 Ω or higher
      D47-6 (CANH) - D43-4 (CG) P - B Air conditioning amplifier Ignition switch off 200 Ω or higher
      D47-17 (CANL) - D43-4 (CG) W - B Air conditioning amplifier Ignition switch off 200 Ω or higher
      D47-8 (CANH) - D43-4 (CG) GR - B Main body ECU Ignition switch off 200 Ω or higher
      D47-19 (CANL) - D43-4 (CG) W - B Main body ECU Ignition switch off 200 Ω or higher
      Result
      Result Proceed to
      OK A
      NG (Yaw rate sensor branch wire) B
      NG (Center airbag sensor assembly branch wire) C
      NG (Air conditioning amplifier branch wire) D
      NG (Main body ECU branch wire) E

  3. Click here

    REPLACE CAN JUNCTION CONNECTOR CTR

  4. Click here

    REPAIR OR REPLACE DLC3 BRANCH WIRE

  5. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECM MAIN WIRE)


    1. A017EELE04

      Disconnect the ECM connector.

    2. A017E4AE27

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D47-5 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher
      D47-16 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher

  6. Click here

    REPLACE ECMClick here

  7. Click here

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (ECM MAIN WIRE)

  8. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN JUNCTION CONNECTOR RH)


    1. Disconnect the CAN junction connector RH.

    2. A017BAHE29

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

      Tip:

      The resistance must be measured after the CAN junction connector CTR is disconnected.

      Standard resistance
      Tester Connection Wiring Color Connect to Condition Specified Condition
      D51-3 (CANH) - D43-4 (CG) P - B Combination meter Ignition switch off 200 Ω or higher
      D51-14 (CANL) - D43-4 (CG) W - B Combination meter Ignition switch off 200 Ω or higher
      D51-5 (CANH) - D43-4 (CG) SB - B CAN junction connector CTR Ignition switch off 200 Ω or higher
      D51-16 (CANL) - D43-4 (CG) W - B CAN junction connector CTR Ignition switch off 200 Ω or higher
      Result
      Result Proceed to
      OK A
      NG (Combination meter main wire) B
      NG (CAN junction connector CTR main wire) C

  9. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN JUNCTION CONNECTOR RH)


    1. A017BAHE30

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

      Standard resistance
      Tester Connection Wiring Color Connect to Condition Specified Condition
      D51-1 (CANH) - D43-4 (CG) R - B Steering angle sensor Ignition switch off 200 Ω or higher
      D51-12 (CANL) - D43-4 (CG) W - B Steering angle sensor Ignition switch off 200 Ω or higher
      D51-2 (CANH) - D43-4 (CG) BR - B Power steering ECU Ignition switch off 200 Ω or higher
      D51-13 (CANL) - D43-4 (CG) W - B Power steering ECU Ignition switch off 200 Ω or higher
      D51-4 (CANH) - D43-4 (CG) B - B Skid control ECU Ignition switch off 200 Ω or higher
      D51-15 (CANL) - D43-4 (CG) W - B Skid control ECU Ignition switch off 200 Ω or higher
      Result
      Result Proceed to
      OK A
      NG (Steering angle sensor branch wire) B
      NG (Power steering ECU branch wire) C
      NG (Skid control ECU branch wire) D

  10. Click here

    REPLACE CAN JUNCTION CONNECTOR RH

  11. Click here

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN JUNCTION CONNECTOR CTR - CAN JUNCTION CONNECTOR RH)

  12. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (COMBINATION METER MAIN WIRE)


    1. A017BD2E21

      Disconnect the combination meter connector.

    2. A017E4AE21

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D51-3 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher
      D51-14 (CANL) - D43-4 (CG) Ignition switch off 200 Ω or higher

  13. Click here

    REPLACE COMBINATION METERClick here

  14. Click here

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (COMBINATION METER MAIN WIRE)

  15. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (YAW RATE SENSOR BRANCH WIRE)


    1. A017DEAE04

      Disconnect the yaw rate sensor connector.

    2. A017E4AE39

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D47-2 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher
      D47-13 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher

  16. Click here

    REPLACE YAW RATE SENSORClick here

  17. Click here

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (YAW RATE SENSOR BRANCH WIRE)

  18. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE)


    1. A017DMZE22

      Disconnect the center airbag sensor assembly connector.

    2. A017E4AE28

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D47-3 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher
      D47-14 (CANL) - D43-4 (CG) Ignition switch off 200 Ω or higher

  19. Click here

    REPLACE CENTER AIRBAG SENSOR ASSEMBLYClick here

  20. Click here

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE)

  21. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER BRANCH WIRE)


    1. A017FS6E06

      Disconnect the air conditioning amplifier connector.

    2. A017E4AE29

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D47-6 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher
      D47-17 (CANL) - D43-4 (CG) Ignition switch off 200 Ω or higher

  22. Click here

    REPLACE AIR CONDITIONING AMPLIFIERClick here

  23. Click here

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

  24. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (MAIN BODY ECU BRANCH WIRE)


    1. A017F33E05

      Disconnect the main body ECU connector.

    2. A017E4AE20

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D47-8 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher
      D47-19 (CANL) - D43-4 (CG) Ignition switch off 200 Ω or higher

  25. Click here

    REPLACE MAIN BODY ECU

  26. Click here

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (MAIN BODY ECU BRANCH WIRE)

  27. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (STEERING ANGLE SENSOR BRANCH WIRE)


    1. A017FNVE03

      Disconnect the steering angle sensor connector.

    2. A017E4AE31

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D51-1 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher
      D51-12 (CANL) - D43-4 (CG) Ignition switch off 200 Ω or higher

  28. Click here

    REPLACE STEERING ANGLE SENSORClick here

  29. Click here

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (STEERING ANGLE SENSOR BRANCH WIRE)

  30. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (POWER STEERING ECU BRANCH WIRE)


    1. A017BE3E11

      Disconnect the power steering ECU connector.

    2. A017E4AE30

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D51-2 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher
      D51-13 (CANL) - D43-4 (CG) Ignition switch off 200 Ω or higher

  31. Click here

    REPLACE POWER STEERING ECUClick here

  32. Click here

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (POWER STEERING ECU BRANCH WIRE)

  33. Click here

    CHECK FOR SHORT TO GND IN CAN BUS WIRE (SKID CONTROL ECU BRANCH WIRE)


    1. A017C50E48

      Disconnect the skid control ECU connector.

    2. A017E4AE33

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D51-4 (CANH) - D43-4 (CG) Ignition switch off 200 Ω or higher
      D51-15 (CANL) - D43-4 (CG) Ignition switch off 200 Ω or higher

  34. Click here

    REPLACE BRAKE ACTUATOR ASSEMBLYClick here

  35. Click here

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (SKID CONTROL ECU BRANCH WIRE)