CAN COMMUNICATION SYSTEM (for LHD without 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*1

  • No. 5 junction connector*2

  • Brake actuator assembly (skid control ECU)

  • Four wheel drive control ECU

  • Power steering ECU assembly*1

  • Air conditioning amplifier assembly

  • Display and navigation module display (AVN)*3

  • Center airbag sensor assembly

  • Spiral cable sub-assembly (steering angle sensor)*4

  • Yaw rate sensor assembly

  • Main body ECU (multiplex network body ECU)

  • Combination meter assembly

  • No. 1 junction connector

  • No. 2 junction connector

  • No. 3 junction connector

  • No. 4 junction connector


WIRING DIAGRAM

A00JZXME01
A00JYYPE01

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. 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 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.

      • 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. A00JWSAE66
      Text in Illustration
      *a Front view of DLC3

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

    NG
    OK
  3. CONNECT CONNECTOR


    1. Reconnect the G94 No. 4 junction connector connector.


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


    1. A00JWSAE66
      Text in Illustration
      *a Front view of DLC3

      Disconnect the A72 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) Ignition switch off 200 Ω or higher
      G48-14 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

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


    1. A00K0PYE73
      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
      A72-11 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      A72-22 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

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


    1. A00K0PYE74
      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
      A72-10 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      A72-21 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher
      Result
      Result Proceed to
      OK A
      NG (for 2TR-FE) B
      NG (for 5L-E) C

    B
    C
    A
  7. CONNECT CONNECTOR


    1. Reconnect the A72 No. 1 junction connector connector.


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


    1. A00JYP2E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Brake Actuator Assembly [Skid Control ECU])

      *b Front view of DLC3

      Disconnect the A6 brake actuator assembly (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
      A6-25 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      A6-14 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  9. CONNECT CONNECTOR


    1. Reconnect the A72 No. 1 junction connector connector.


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


    1. A00JYY5E11
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      *b Front view of DLC3

      Disconnect the G60 ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G60-34 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G60-33 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  11. CONNECT CONNECTOR


    1. Reconnect the A72 No. 1 junction connector connector.


    NEXT
  12. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 5 JUNCTION CONNECTOR)


    1. A00JUFKE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 5 Junction Connector)

      *b Front view of DLC3

      Disconnect the G101 No. 5 junction connector connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G101-3 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G101-2 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  13. CONNECT CONNECTOR


    1. Reconnect the A72 No. 1 junction connector connector.


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


    1. A00K0PYE75
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

      *b Front view of DLC3

      Disconnect the G97 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
      G97-6 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G97-17 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

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


    1. A00JWSAE66
      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) Ignition switch off 200 Ω or higher
      G48-14 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  16. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)

    Tech Tips

    For vehicles with a 5L-E engine, go to "Check for Short to GND in CAN Bus Wire (No. 2 Junction Connector - Four Wheel Drive Control ECU)".


    1. A00K0PYE76
      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
      G97-5 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G97-16 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  17. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - FOUR WHEEL DRIVE CONTROL ECU)


    1. A00K0PYE77
      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
      G97-2 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G97-13 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  18. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER)


    1. A00K0PYE78
      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
      G97-4 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G97-15 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  19. CONNECT CONNECTOR


    1. Reconnect the G97 No. 2 junction connector connector.


    NEXT
  20. 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) Ignition switch off 200 Ω or higher
      G46-2 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  21. CONNECT CONNECTOR


    1. Reconnect the G97 No. 2 junction connector connector.


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


    1. A00JZ78E20
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Four Wheel Drive Control ECU)

      *b Front view of DLC3

      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) Ignition switch off 200 Ω or higher
      G53-20 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  23. CONNECT CONNECTOR


    1. Reconnect the G97 No. 2 junction connector connector.


    NEXT
  24. CHECK FOR SHORT TO GND IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY)


    1. A00K11GE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      *b Front view of DLC3

      Disconnect the G25 air conditioning amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G25-11 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G25-12 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  25. CONNECT CONNECTOR


    1. Reconnect the G97 No. 2 junction connector connector.


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


    1. A00K0PYE79
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

      *b Front view of DLC3

      Disconnect the G100 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
      G100-1 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G100-12 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  27. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR SIDE)


    1. A00JWSAE66
      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) Ignition switch off 200 Ω or higher
      G48-14 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  28. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 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 Wire (No. 3 Junction Connector - Center Airbag Sensor Assembly)".


    1. A00K0PYE80
      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
      G100-2 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G100-13 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  29. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)


    1. A00K0PYE81
      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
      G100-5 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G100-16 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  30. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - SPIRAL CABLE SUB-ASSEMBLY)

    Tech Tips

    For vehicles without a vehicle stability control system (for vacuum brake booster), go to "Check for Short to GND in CAN Bus Wire (No. 3 Junction Connector - Yaw Rate Sensor Assembly)".


    1. A00K0PYE72
      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
      G100-3 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G100-14 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  31. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - YAW RATE SENSOR ASSEMBLY)


    1. A00K0PYE71
      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
      G100-4 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G100-15 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  32. CONNECT CONNECTOR


    1. Reconnect the G100 No. 3 junction connector connector.


    NEXT
  33. 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) Ignition switch off 200 Ω or higher
      H4-22 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  34. CONNECT CONNECTOR


    1. Reconnect the G100 No. 3 junction connector connector.


    NEXT
  35. 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) Ignition switch off 200 Ω or higher
      G1-22 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  36. CONNECT CONNECTOR


    1. Reconnect the G100 No. 3 junction connector connector.


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


    1. A00K1VAE08
      Text in Illustration
      *a

      Front 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) Ignition switch off 200 Ω or higher
      G33-3 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  38. CONNECT CONNECTOR


    1. Reconnect the G100 No. 3 junction connector connector.


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


    1. A00JWYPE08
      Text in Illustration
      *a

      Front 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) Ignition switch off 200 Ω or higher
      G52-2 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  40. CONNECT CONNECTOR


    1. Reconnect the G100 No. 3 junction connector connector.


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


    1. A00K0PYE70
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 4 Junction Connector)

      *b Front view of DLC3

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

    NG
    OK
  42. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR - MAIN BODY ECU)


    1. A00K0PYE69
      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
      G94-3 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G94-14 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

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


    1. A00K0PYE68
      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
      G94-2 (CANH) - G48-4 (CG) Ignition switch off 200 Ω or higher
      G94-13 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  44. CONNECT CONNECTOR


    1. Reconnect the G94 No. 4 junction connector connector.


    NEXT
  45. 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) Ignition switch off 200 Ω or higher
      G64-13 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK
  46. CONNECT CONNECTOR


    1. Reconnect the G94 No. 4 junction connector connector.


    NEXT
  47. 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) Ignition switch off 200 Ω or higher
      G6-39 (CANL) - G48-4 (CG) Ignition switch off 200 Ω or higher

    NG
    OK