CAN COMMUNICATION SYSTEM (for LHD with Entry and Start System) Short to GND in CAN Bus Line

DESCRIPTION

There may be a short circuit between the CAN bus lines and GND when the resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3 is below 200 Ω.

Symptom Trouble Area
The resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3 is below 200 Ω.
  • Short between CAN bus lines and GND

  • ECM

  • Certification ECU

  • Four wheel drive control ECU

  • Power steering ECU assembly

  • Power management control ECU

  • Display and navigation module display (AVN)*

  • Center airbag sensor assembly

  • Spiral cable sub-assembly (steering angle sensor)

  • Yaw rate sensor assembly

  • Main body ECU (multiplex network body ECU)

  • Master cylinder solenoid (skid control ECU)

  • Combination meter assembly

  • No. 1 junction connector

  • No. 2 junction connector

  • No. 3 junction connector

  • No. 4 junction connector


WIRING DIAGRAM

A00JYLEE01
A00JYLXE01

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 SHORT TO GND IN CAN BUS WIRE (DLC3 BRANCH WIRE)


    1. A00JWSAE56
      Text in Illustration
      *a Front view of DLC3

      Disconnect the G94 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
      G48-6 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G48-14 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  3. CONNECT CONNECTOR


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


    NEXT
  4. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR SIDE)


    1. A00JWSAE56
      Text in Illustration
      *a Front view of DLC3

      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
      G48-6 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G48-14 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  5. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - CERTIFICATION ECU)


    1. A00K0PYE37
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 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
      G97-3 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G97-14 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  6. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)


    1. A00K0PYE38
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 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
      G97-5 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G97-16 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  7. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU)


    1. A00K0PYE39
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 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
      G97-4 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G97-15 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  8. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - FOUR WHEEL DRIVE CONTROL ECU)


    1. A00K0PYE40
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 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
      G97-2 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G97-13 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  9. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - ECM)


    1. A00K0PYE41
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 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
      G97-6 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G97-17 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  10. CONNECT CONNECTOR


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


    NEXT
  11. CHECK FOR SHORT TO GND IN CAN BUS WIRE (CERTIFICATION ECU)


    1. A00JU69E05
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Certification ECU)

      *b Front view of DLC3

      Disconnect the G38 certification ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G38-9 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G38-10 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  12. CONNECT CONNECTOR


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


    NEXT
  13. CHECK FOR SHORT TO GND IN CAN BUS WIRE (POWER STEERING ECU ASSEMBLY)


    1. A00K052E09
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Steering ECU Assembly)

      *b Front view of DLC3

      Disconnect the G46 power steering ECU assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G46-1 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G46-2 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  14. CONNECT CONNECTOR


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


    NEXT
  15. CHECK FOR SHORT TO GND IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU)


    1. A00JY3TE13
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      *b Front view of DLC3

      Disconnect the G51 power management control ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G51-14 (CA1H) - G48-4 (CG) Engine switch off 200 Ω or higher
      G51-13 (CA1L) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  16. CONNECT CONNECTOR


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


    NEXT
  17. CHECK FOR SHORT TO GND IN CAN BUS WIRE (FOUR WHEEL DRIVE CONTROL ECU)


    1. A00JZ78E20

      Disconnect the G53 four wheel drive control ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G53-19 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G53-20 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  18. CONNECT CONNECTOR


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


    NEXT
  19. CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECM)


    1. A00JYY5E12
      Text in Illustration
      *A for 1GR-FE
      *B for 1KD-FTV
      *a

      Rear view of wire harness connector

      (to ECM)

      *b Front view of DLC3

      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) - G48-4 (CG) Engine switch off 200 Ω or higher
      G56-31 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher
      for 1KD-FTV
      Tester Connection Switch Condition Specified Condition
      G58-35 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G58-36 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher
      Result
      Result Proceed to
      OK (for 1GR-FE) A
      OK (for 1KD-FTV) B
      NG C

    B
    C
    A
  20. CONNECT CONNECTOR


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


    NEXT
  21. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)


    1. A00K0PYE42
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

      *b Front view of DLC3

      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) - G48-4 (CG) Engine switch off 200 Ω or higher
      G100-12 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  22. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR SIDE)


    1. A00JWSAE56
      Text in Illustration
      *a Front view of DLC3

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G48-6 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G48-14 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  23. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - DISPLAY AND NAVIGATION MODULE DISPLAY)

    Tech Tips

    For vehicles without a navigation system, go to "Check for Short to GND in CAN Bus Wires (No. 2 Junction Connector - Center Airbag Sensor Assembly)".


    1. A00K0PYE43
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 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
      G100-2 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G100-13 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  24. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)


    1. A00K0PYE44
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 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
      G100-5 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G100-16 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  25. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - SPIRAL CABLE SUB-ASSEMBLY)


    1. A00K0PYE45
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 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
      G100-3 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G100-14 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  26. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - YAW RATE SENSOR ASSEMBLY)


    1. A00K0PYE46
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 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
      G100-4 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G100-15 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  27. CONNECT CONNECTOR


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


    NEXT
  28. CHECK FOR SHORT TO GND IN CAN BUS WIRE (DISPLAY AND NAVIGATION MODULE DISPLAY)


    1. A00K14ME04
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Display and Navigation Module Display [AVN])

      *b Front view of DLC3

      Disconnect the H4 display and navigation module display (AVN) connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      H4-21 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      H4-22 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  29. CONNECT CONNECTOR


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


    NEXT
  30. CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY)


    1. A00JXQCE08
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Center Airbag Sensor Assembly)

      *b Front view of DLC3

      Disconnect the G1 center airbag sensor assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G1-13 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G1-22 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  31. CONNECT CONNECTOR


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


    NEXT
  32. CHECK FOR SHORT TO GND IN CAN BUS WIRE (SPIRAL CABLE SUB-ASSEMBLY)


    1. A00K1VAE08
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Spiral Cable Sub-assembly [Steering Angle Sensor])

      *b Front view of DLC3

      Disconnect the G33 spiral cable sub-assembly (steering angle sensor) connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G33-4 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G33-3 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  33. CONNECT CONNECTOR


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


    NEXT
  34. CHECK FOR SHORT TO GND IN CAN BUS WIRE (YAW RATE SENSOR ASSEMBLY)


    1. A00JWYPE08
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Yaw Rate Sensor Assembly)

      *b Front view of DLC3

      Disconnect the G52 yaw rate sensor assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G52-3 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G52-2 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  35. CONNECT CONNECTOR


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


    NEXT
  36. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)


    1. A00K0PYE47
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

      *b Front view of DLC3

      Disconnect the G94 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
      G94-1 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G94-12 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  37. CONNECT CONNECTOR


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


    NEXT
  38. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR SIDE)


    1. A00JWSAE56
      Text in Illustration
      *a Front view of DLC3

      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
      G48-6 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G48-14 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  39. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR - SKID CONTROL ECU)


    1. A00K0PYE48
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 4 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
      A73-11 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      A73-22 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  40. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)


    1. A00K0PYE49
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 4 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
      A73-10 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      A73-21 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  41. CONNECT CONNECTOR


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


    NEXT
  42. CHECK FOR SHORT TO GND IN CAN BUS WIRE (SKID CONTROL ECU)


    1. A00JZJXE07
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Master Cylinder Solenoid [Skid Control ECU])

      *b Front view of DLC3

      Disconnect the A7 master cylinder solenoid (skid control ECU) connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A7-11 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      A7-25 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  43. CONNECT CONNECTOR


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


    NEXT
  44. CHECK FOR SHORT TO GND IN CAN BUS WIRE (COMBINATION METER ASSEMBLY)


    1. A00JZ78E21
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Combination Meter Assembly)

      *b Front view of DLC3

      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) - G48-4 (CG) Engine switch off 200 Ω or higher
      G6-39 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  45. CONNECT CONNECTOR


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


    NEXT
  46. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR)


    1. A00K0PYE50
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

      *b Front view of DLC3

      Disconnect the G94 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
      G94-6 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G94-17 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  47. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - MAIN BODY ECU)


    1. A00K0PYE51
      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
      G94-3 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G94-14 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK
  48. CONNECT CONNECTOR


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


    NEXT
  49. CHECK FOR SHORT TO GND IN CAN BUS WIRE (MAIN BODY ECU)


    1. A00JY3TE14
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Main Body ECU [Multiplex Network Body ECU])

      *b Front view of DLC3

      Disconnect the G64 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G64-14 (CANH) - G48-4 (CG) Engine switch off 200 Ω or higher
      G64-13 (CANL) - G48-4 (CG) Engine switch off 200 Ω or higher

    NG
    OK