Click here

CAN COMMUNICATION SYSTEM(w/o Toyota Safety Sense) Check CAN Bus Lines for Short Circuit (RHD Models)

Click here
Click here
DTC Code DTC Name
  Check CAN Bus Lines for Short Circuit (RHD Models)
Click here

DESCRIPTION

There may be a short circuit between the CAN bus lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.

Symptom Trouble Area
The resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.

  • Short between CAN bus lines

  • ECM

  • Combination meter assembly

  • Center airbag sensor assembly

  • Skid control ECU (brake actuator assembly)

  • Main body ECU (multiplex network body ECU)

  • Power steering ECU assembly

  • Certification ECU (smart key ECU assembly)*1

  • Steering angle sensor (spiral cable sub-assembly)*2

  • Radio and display receiver assembly*3

  • Air conditioning amplifier assembly*4

  • Engine stop and start ECU*5

  • No. 1 junction connector

  • No. 2 junction connector

A01VDTAE03
Click here

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

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 doors need to be opened in order to check 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 resistance variation.

Click here

PROCEDURE


  1. Click here

    CHECK SHORT IN CAN BUS WIRES (DLC3 BRANCH WIRE)


    1. Turn the ignition switch off.

    2. Disconnect the F83 No. 2 junction connector.

    3. A01VLJ8E01

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F4-6 (CANH) - F4-14 (CANL) Ignition switch off 1 MΩ or higher
      Table 1. Text in Illustration
      *a Front view of DLC3

    • OKClick here
    • NG

      REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (DLC3 BRANCH WIRE)

  2. Click here

    CONNECT CONNECTOR


    1. Reconnect the F83 No. 2 junction connector.


  3. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR)


    1. Disconnect the A61 and F82 No. 1 junction connectors.

    2. A01VLJ8E01

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F4-6 (CANH) - F4-14 (CANL) Ignition switch off 108 to 132 Ω
      Table 2. Text in Illustration
      *a Front view of DLC3

  4. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ECM)


    1. A01VF6VE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A61-9 (CANH) - A61-20 (CANL) Ignition switch off 108 to 132 Ω
      Table 3. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

  5. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)


    1. A01VGW1E02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A61-10 (CANH) - A61-21 (CANL) Ignition switch off 200 Ω or higher
      Table 4. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

  6. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ENGINE STOP AND START ECU)

    Tip:

    For vehicles without stop and start system, go to step 7.


    1. A01VI3KE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F82-5 (CANH) - F82-16 (CANL) Ignition switch off 200 Ω or higher
      Table 5. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

  7. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. A01VLP5E02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F82-1 (CANH) - F82-12 (CANL) Ignition switch off 200 Ω or higher
      Table 6. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

  8. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)


    1. Disconnect the No. 2 junction connector.

    2. A01VIENE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F82-4 (CANH) - F82-15 (CANL) Ignition switch off 1 MΩ or higher
      Table 7. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

    • OKClick here
    • NG

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

  9. Click here

    CONNECT CONNECTOR


    1. Reconnect the A61 and F82 No. 1 junction connectors.


  10. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)


    1. A01VGAAE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-7 (CANH) - F83-18 (CANL) Ignition switch off 108 to 132 Ω
      Table 8. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  11. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

    Tip:

    For vehicles without air conditioning system, go to step 12.


    1. A01VM1UE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-8 (CANH) - F83-19 (CANL) Ignition switch off 200 Ω or higher
      Table 9. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  12. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY))

    Tip:

    For vehicles without VSC, go to step 13.


    1. A01VFGVE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-1 (CANH) - F83-12 (CANL) Ignition switch off 200 Ω or higher
      Table 10. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  13. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)


    1. A01VJ3VE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-6 (CANH) - F83-17 (CANL) Ignition switch off 200 Ω or higher
      Table 11. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  14. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - RADIO AND DISPLAY RECEIVER ASSEMBLY)

    Tip:

    For vehicles without display, go to step 15.


    1. A01VFTPE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-5 (CANH) - F83-16 (CANL) Ignition switch off 200 Ω or higher
      Table 12. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  15. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

    Tip:

    For vehicles without entry and start system, go to step 16.


    1. A01VJ78E02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-3 (CANH) - F83-14 (CANL) Ignition switch off 200 Ω or higher
      Table 13. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

  16. Click here

    CHECK SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)


    1. A01VIX8E03

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-4 (CANH) - F83-15 (CANL) Ignition switch off 200 Ω or higher
      Table 14. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

  17. Click here

    CHECK SHORT IN CAN BUS WIRES (ECM MAIN WIRE)


    1. Disconnect the A58*1, A93*2 or A108*3 ECM connector.

      *1: for 1NR-FE

      *2: for 1KR-FE

      *3: for 1ND-TV with DPF

    2. A01VF6VE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A61-9 (CANH) - A61-20 (CANL) Ignition switch off 1 MΩ or higher
      Table 15. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)
      Table 16. Result
      Result Proceed to
      NG A
      OK (for 1NR-FE) B
      OK (for 1KR-FE) C
      OK (for 1ND-TV with DPF) D

  18. Click here

    CHECK SHORT IN CAN BUS WIRES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH WIRE)


    1. Disconnect the A78 skid control ECU (brake actuator assembly) connector.

    2. A01VGW1E02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A61-10 (CANH) - A61-21 (CANL) Ignition switch off 1 MΩ or higher
      Table 17. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

    • OK

      REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) (Click here)

    • NG

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

  19. Click here

    CHECK SHORT IN CAN BUS WIRES (ENGINE STOP AND START ECU BRANCH WIRE)


    1. Disconnect the F131 engine stop and start ECU connector.

    2. A01VI3KE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F82-5 (CANH) - F82-16 (CANL) Ignition switch off 1 MΩ or higher
      Table 18. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

    • OK

      REPLACE ENGINE STOP AND START ECU (Click here)

    • NG

      REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (ENGINE STOP AND START ECU BRANCH WIRE)

  20. Click here

    CHECK SHORT IN CAN BUS WIRES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) BRANCH WIRE)


    1. Disconnect the F76 main body ECU (multiplex network body ECU) connector.

    2. A01VLP5E02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F82-1 (CANH) - F82-12 (CANL) Ignition switch off 1 MΩ or higher
      Table 19. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 1 Junction Connector)

    • OK

      REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

    • NG

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

  21. Click here

    CHECK SHORT IN CAN BUS WIRES (COMBINATION METER ASSEMBLY MAIN WIRE)


    1. Disconnect the F1 combination meter assembly connector.

    2. A01VGAAE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-7 (CANH) - F83-18 (CANL) Ignition switch off 1 MΩ or higher
      Table 20. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

    • OK

      REPLACE COMBINATION METER ASSEMBLY (Click here)

    • NG

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

  22. Click here

    CHECK SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH WIRE)


    1. Disconnect the F42*1 or F41*2 air conditioning amplifier assembly connector.

      *1: w/ Automatic Air Conditioning System

      *2: w/ Manual Air Conditioning System

    2. A01VM1UE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-8 (CANH) - F83-19 (CANL) Ignition switch off 1 MΩ or higher
      Table 21. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

    • OK

      REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

    • NG

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

  23. Click here

    CHECK SHORT IN CAN BUS WIRES (STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY) BRANCH WIRE)


    1. Disconnect the F30 steering angle sensor (spiral cable sub-assembly) connector.

    2. A01VFGVE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-1 (CANH) - F83-12 (CANL) Ignition switch off 1 MΩ or higher
      Table 22. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

    • OK

      REPLACE STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY) (Click here)

    • NG

      REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY) BRANCH WIRE)

  24. Click here

    CHECK SHORT IN CAN BUS WIRES (POWER STEERING ECU ASSEMBLY)


    1. Disconnect the F6 power steering ECU assembly connector.

    2. A01VJ3VE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-6 (CANH) - F83-17 (CANL) Ignition switch off 1 MΩ or higher
      Table 23. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

    • OK

      REPLACE POWER STEERING ECU ASSEMBLY (Click here)

    • NG

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

  25. Click here

    CHECK SHORT IN CAN BUS WIRES (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH WIRE)


    1. Disconnect the F115 radio and display receiver assembly connector.

    2. A01VFTPE02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-5 (CANH) - F83-16 (CANL) Ignition switch off 1 MΩ or higher
      Table 24. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

    • OK

      REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (Click here)

    • NG

      REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH WIRE)

  26. Click here

    CHECK SHORT IN CAN BUS WIRES (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) BRANCH WIRE)


    1. Disconnect the F63 certification ECU (smart key ECU assembly) connector.

    2. A01VJ78E02

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-3 (CANH) - F83-14 (CANL) Ignition switch off 1 MΩ or higher
      Table 25. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

    • OK

      REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    • NG

      REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) BRANCH WIRE)

  27. Click here

    CHECK SHORT IN CAN BUS WIRES (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE)


    1. Disconnect the F16 center airbag sensor assembly connector.

    2. A01VIX8E03

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F83-4 (CANH) - F83-15 (CANL) Ignition switch off 1 MΩ or higher
      Table 26. Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 2 Junction Connector)

    • OK

      REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)

    • NG

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