CAN COMMUNICATION SYSTEM Check CAN Bus Lines for Short Circuit (LHD Models)

DESCRIPTION

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

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

  • Short in CAN bus main wire

  • Short in CAN bus branch wire

  • Combination meter

  • Yaw rate and acceleration sensor

  • Power steering ECU

  • Center airbag sensor assembly

  • Steering angle sensor

  • Air conditioning amplifier

  • Brake actuator (Skid control ECU)

  • Main body ECU (Driver side junction block)

  • ECM

  • CAN junction connector CTR

  • CAN No. 1 junction connector RH

  • CAN No. 2 junction connector

  • CAN No. 3 junction connector

  • CAN No. 5 junction connector

  • CAN No. 6 junction connector

  • AFS ECU

  • Navigation ECU sub-assembly*1

Tech Tips

*1: w/ Navigation system

WIRING DIAGRAM

A01CDTXE03
A01CGECE03

INSPECTION PROCEDURE

Note


  • Turn the engine switch off before measuring the resistances of the CAN main wires and the CAN branch wires.

  • After the engine 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 engine switch, any other switches or doors. If any doors need to be opened in order to check the connectors, open the doors and leave them open.

Tech Tips


  • Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • 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.

PROCEDURE


  1. CHECK FOR SHORT IN CAN BUS WIRE (DLC3 BRANCH WIRE)


    1. Turn the engine switch off.

    2. A01CEPAE12
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 2 Junction Connector)

      Disconnect the connector of the CAN No. 2 junction connector.

    3. A01CEZIE01
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G8-6 (CANH) - G8-14 (CANL) Engine switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3

    OK

  2. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 3 J/C)


    1. A01CEPAE13
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 2 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G56-5 (CANH) - G56-16 (CANL) Engine switch off 108 to 132 Ω

    NG

    CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 3 J/C) Click here

    OK

  3. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 6 J/C)


    1. A01CEPAE14
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 2 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G56-1 (CANH) - G56-12 (CANL) Engine switch off 108 to 132 Ω

    NG

    CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 6 J/C) Click here

    OK

  4. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - MAIN BODY ECU)


    1. A01CGFNE13
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Main Body ECU)

      Disconnect the connector of the main body ECU.

    2. A01CFKWE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 2 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G56-3 (CANH) - G56-14 (CANL) Engine switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - MAIN BODY ECU)

    OK

  5. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - POWER STEERING ECU)


    1. A01CF3FE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Power Steering ECU)

      Disconnect the connector of the power steering ECU.

    2. A01CEPAE15
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 2 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G56-4 (CANH) - G56-15 (CANL) Engine switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - POWER STEERING ECU)

    OK

  6. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C)


    1. Reconnect the connector of the CAN No. 2 junction connector.

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short-circuited branch wire is connected Click here.

    3. A01CEZIE01
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G8-6 (CANH) - G8-14 (CANL) Engine switch off 54 to 69 Ω

      Tech Tips

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.


    NG

    REPLACE CAN NO. 2 JUNCTION CONNECTOR

    OK

  7. CHECK FOR SHORT IN CAN BUS WIRES (ECU, SENSOR)


    1. A01CEZIE01
      Text in Illustration
      *1 DLC3

      Connect the probes of an ohmmeter to terminals 6 (CANH) and 14 (CANL) of the DLC3.

    2. While observing the resistance value shown on the ohmmeter, reconnect each ECU and sensor connector until the resistance becomes abnormal (Below 54 Ω).

      Tech Tips

      If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.


    NEXT

    REPLACE CORRESPONDING ECU OR SENSOR

  8. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 6 J/C)


    1. A01CDRXE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 6 Junction Connector)

      Reconnect the connector of the CAN No. 2 junction connector.

    2. Disconnect the connector of the CAN No. 6 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A44-3 (CANH) - A44-5 (CANL) Engine switch off 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 2 J/C - CAN NO. 6 J/C)

    OK

  9. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 6 J/C - ECM)


    1. A01CDRXE05
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 6 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A44-1 (CANH) - A44-6 (CANL) Engine switch off 108 to 132 Ω

    NG

    CHECK FOR SHORT IN CAN BUS WIRE (ECM) Click here

    OK

  10. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 6 J/C - SKID CONTROL ECU)


    1. A01CFJZE88
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU)

      Disconnect the connector of the skid control ECU.

    2. A01CDRXE06
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 6 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A44-2 (CANH) - A44-4 (CANL) Engine switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 6 J/C - SKID CONTROL ECU)

    OK

  11. CHECK FOR SHORT IN CAN BUS WIRE (SKID CONTROL ECU)


    1. Reconnect the connector of the CAN No. 6 junction connector.

    2. A01CEZIE01
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G8-6 (CANH) - G8-14 (CANL) Engine switch off 54 Ω or higher

    NG

    REPLACE CAN NO. 6 JUNCTION CONNECTOR

    OK

    REPLACE BRAKE ACTUATOR (SKID CONTROL ECU) Click here

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


    1. A01CD8TE66
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the connector of the ECM.

    2. A01CDRXE07
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 6 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A44-1 (CANH) - A44-6 (CANL) Engine switch off 1 MΩ or higher
      Result
      Result Proceed to
      OK (for 2AZ-FE) A
      OK (for 2GR-FE) B
      NG C

    B

    REPLACE ECM (for 2GR-FE) Click here

    C

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 6 J/C - ECM)

    A

    REPLACE ECM (for 2AZ-FE) Click here

  13. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - CAN NO. 3 J/C)


    1. Reconnect the connector of the CAN No. 2 junction connector.

    2. A01CEPAE16
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)

      Disconnect the connector of the CAN No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F10-9 (CANH) - F10-20 (CANL) Engine switch off 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 2 J/C - CAN NO. 3 J/C)

    OK

  14. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 3 J/C - CAN J/C CTR)


    1. A01CEPAE17
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F10-8 (CANH) - F10-19 (CANL) Engine switch off 108 to 132 Ω
      Result
      Result Proceed to
      OK (w/ Navigation system) A
      OK (w/o Navigation system) B
      NG C

    B

    REPLACE CAN NO. 3 JUNCTION CONNECTOR

    C

    CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 3 J/C - CAN J/C CTR) Click here

    A

  15. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 3 J/C - NAVIGATION ECU)


    1. A01CE2ZE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Navigation ECU Sub-assembly (w/o Front Center Speaker))
      *b

      Front view of wire harness connector

      (to Navigation ECU Sub-assembly (w/ Front Center Speaker))

      Disconnect the connector of the navigation ECU.

    2. A01CEPAE18
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 3 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      F10-11 (CANH) - F10-22 (CANL) Engine switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 3 J/C - NAVIGATION ECU)

    OK

  16. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 3 J/C)


    1. Reconnect the connector of the CAN No. 3 junction connector.

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU to which the short-circuited branch wire is connected Click here.

    3. A01CEZIE01
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G8-6 (CANH) - G8-14 (CANL) Engine switch off 54 to 69 Ω

      Tech Tips

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU, there may be a short in the ECU.


    NG

    REPLACE CAN NO. 3 JUNCTION CONNECTOR

    OK

  17. CHECK FOR SHORT IN CAN BUS WIRES (ECU, SENSOR)


    1. A01CEZIE01
      Text in Illustration
      *1 DLC3

      Connect the probes of an ohmmeter to terminals 6 (CANH) and 14 (CANL) of the DLC3.

    2. While observing the resistance value shown on the ohmmeter, reconnect each ECU and sensor connector until the resistance becomes abnormal (Below 54 Ω).

      Tech Tips

      If the resistance becomes abnormal when an ECU connector is reconnected, there be a may be a short in the ECU.


    NEXT

    REPLACE CORRESPONDING ECU OR SENSOR

  18. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 3 J/C - CAN J/C CTR)


    1. Reconnect the connector of the CAN No. 3 junction connector.

    2. A01CFC1E14
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector CTR)

      Disconnect the CAN main wire connector (G61) from the CAN junction connector CTR (w/o earth terminal).

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G61-1 (CANH) - G61-2 (CANL) Engine switch off 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 3 J/C - CAN J/C CTR)

    OK

  19. CHECK FOR SHORT IN CAN BUS WIRE (CAN J/C CTR - CAN NO. 1 J/C RH)


    1. A01CD8NE10
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector CTR)

      Disconnect the CAN main wire connector (G62) from the CAN junction connector CTR (w/o earth terminal).

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G62-1 (CANH) - G62-2 (CANL) Engine switch off 108 to 132 Ω

    NG

    CHECK FOR SHORT IN CAN BUS WIRE (CAN J/C CTR - CAN NO. 1 J/C RH) Click here

    OK

  20. CHECK FOR SHORT IN CAN BUS WIRE (CAN J/C CTR)


    1. Reconnect the CAN main wire connector (G61 and G62) to the CAN junction connector CTR (w/o earth terminal).

    2. A01CEZIE01
      Text in Illustration
      *1 DLC3

      Connect the probes of an ohmmeter to terminals CANH and CANL of the DLC3.

    3. While observing the resistance value shown on the tester, disconnect connectors (G63 and G90) from the CAN junction connector CTR one by one until the resistance becomes normal (between 54 and 69 Ω).

      Tech Tips

      Disconnect the branch wire connectors other than those of the DLC3.

      A01CGFQE02
      for CAN Junction Connector B Side
      Terminal No. (Symbol) Wiring Color Connected to
      G61-1 (CANH) R CAN No. 3 junction connector
      G61-2 (CANL) W
      G62-1 (CANH) SB CAN No. 1 junction connector RH
      G62-2 (CANL) W
      G63-1 (CANH) Y Center airbag sensor assembly
      G63-2 (CANL) W
      G90-1 (CANH) BR Steering angle sensor
      G90-2 (CANL) W
      Text in Illustration
      *1 CAN Junction Connector CTR - -
      *a Junction Connector B Side *b Junction Connector A Side
      *c

      Front view of wire harness connector

      (to CAN Junction Connector CTR)

      		 *d Earth Terminal

      Note

      Do not reconnect the disconnected connectors until this inspection is complete because there may be a short in 2 or more branch wires.

      Result
      Result Proceed to
      The resistance is still below 54 Ω when all the specified connectors are disconnected. (There is no short in the branch wires.) A
      The resistance becomes normal (between 54 and 69 Ω) when a connector is disconnected. (There is a short in one or more of the branch wires.) B

    4. When there is a short in one or more of the branch wires:


      1. Reconnect all of the connectors to the CAN junction connector, except for the one that was disconnected last (the short-circuited bus wire). Check that the resistance shown on the tester becomes normal (between 54 and 69 Ω) to confirm that there is a short in only one branch wire.

        Tech Tips


        • The shape of connectors connected to the CAN junction connector which has an earth terminal is the same. The connectors connected to the CAN junction connector can be distinguished by the colors of the bus wire and the connecting side of the junction connector.

        • Reconnecting the connectors to non-specified positions on the CAN junction connector does not affect system operation. However, it is preferred to reconnect the connectors to their specified positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    B

    CHECK FOR SHORT IN CAN BUS WIRES (ECU, SENSOR) Click here

    A

    REPLACE CAN JUNCTION CONNECTOR CTR

  21. CHECK FOR SHORT IN CAN BUS WIRES (ECU, SENSOR)


    1. Reconnect the connector of the short-circuited branch wire to the CAN junction connector (the connector that caused the bus wire resistance to become normal (between 54 and 69 Ω) when it was disconnected).

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short-circuited branch wire is connected.

    3. A01CEZIE01
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G8-6 (CANH) - G8-14 (CANL) Engine switch off 54 to 69 Ω

      Tech Tips

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.


    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH WIRE OR CONNECTOR

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

  22. CHECK FOR SHORT IN CAN BUS WIRE (CAN J/C CTR - CAN NO. 1 J/C RH)


    1. Reconnect the CAN main wire connector (G62) to the CAN junction connector CTR (w/o earth terminal).

    2. A01CB89E07
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN No. 1 Junction Connector RH)

      Disconnect the CAN main wire connector (G67) from the CAN No. 1 junction connector RH (w/o earth terminal).

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G67-1 (CANH) - G67-2 (CANL) Engine switch off 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN J/C CTR - CAN NO. 1 J/C RH)

    OK

  23. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C RH - CAN NO. 5 J/C)


    1. A01CFC1E15
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN No. 1 Junction Connector RH)

      Disconnect the CAN main wire connector (G88) from the CAN No. 1 junction connector RH (w/o earth terminal).

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G88-1 (CANH) - G88-2 (CANL) Engine switch off 108 to 132 Ω

    NG

    CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C RH - CAN NO. 5 J/C) Click here

    OK

  24. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C RH)


    1. Reconnect the CAN main wire connector (G67 and G88) to the CAN No. 1 junction connector RH (w/o earth terminal).

    2. A01CEZIE01
      Text in Illustration
      *1 DLC3

      Connect the probes of an ohmmeter to terminals CANH and CANL of the DLC3.

    3. While observing the resistance value shown on the tester, disconnect connectors (G87 and G89) from the CAN No. 1 junction connector RH one by one until the resistance becomes normal (between 54 and 69 Ω).

      Tech Tips

      Disconnect the branch wire connectors other than those of the DLC3.

      A01CEJ4E02
      for CAN Junction Connector B Side
      Terminal No. (Symbol) Wiring Color Connected to
      G67-1 (CANH) SB CAN junction connector CTR
      G67-2 (CANL) W
      G87-1 (CANH) R AFS ECU
      G87-2 (CANL) W
      G88-1 (CANH) Y CAN No. 5 junction connector
      G88-2 (CANL) W
      G89-1 (CANH) V Air conditioning amplifier
      G89-2 (CANL) W
      Text in Illustration
      *1 CAN No. 1 Junction Connector RH - -
      *a Junction Connector B Side *b Junction Connector A Side
      *c

      Front view of wire harness connector

      (to CAN No. 1 Junction Connector RH)

      		 *d Earth Terminal

      Note

      Do not reconnect the disconnected connectors until this inspection is complete because there may be a short in 2 or more branch wires.

      Result
      Result Proceed to
      The resistance is still below 54 Ω when all the specified connectors are disconnected. (There is no short in the branch wires.) A
      The resistance becomes normal (between 54 and 69 Ω) when a connector is disconnected. (There is a short in one or more of the branch wires.) B

    4. When there is a short in one or more of the branch wires:


      1. Reconnect all of the connectors to the CAN junction connector, except for the one that was disconnected last (the short-circuited bus wire). Check that the resistance shown on the tester becomes normal (between 54 and 69 Ω) to confirm that there is a short in the only one branch wire.

        Tech Tips


        • The shape of connectors connected to the CAN junction connector which has an earth terminal is the same. The connectors connected to the CAN junction connector can be distinguished by the colors of the bus wire and the connecting side of the junction connector.

        • Reconnecting the connectors to non-specified positions on the CAN junction connector does not affect system operation. However, it is preferred to reconnect the connectors to their specified positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    B

    CHECK FOR SHORT IN CAN BUS WIRE (ECU, SENSOR) Click here

    A

    REPLACE CAN NO. 1 JUNCTION CONNECTOR RH

  25. CHECK FOR SHORT IN CAN BUS WIRE (ECU, SENSOR)


    1. Reconnect the connector for the short-circuited branch wire to the CAN junction connector (the connector that caused the bus wire resistance to become normal (between 54 and 69 Ω) when it was disconnected).

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU to which the short-circuited branch wire is connected.

    3. A01CEZIE01
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G8-6 (CANH) - G8-14 (CANL) Engine switch off 54 to 69 Ω

      Tech Tips

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU, there may be a short in the ECU.


    NG

    REPAIR OR REPLACE CORRESPONDING ECU BRANCH WIRE OR CONNECTOR

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

  26. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 1 J/C RH - CAN NO. 5 J/C)


    1. Reconnect the CAN main wire connector (G88) to the CAN No. 1 junction connector RH (w/o earth terminal).

    2. A01CFKWE15
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)

      Disconnect the connector of the CAN No. 5 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      M22-6 (CANH) - M22-17 (CANL) Engine switch off 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C RH - CAN NO. 5 J/C)

    OK

  27. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 5 J/C - COMBINATION METER)


    1. A01CGINE17
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      M22-7 (CANH) - M22-18 (CANL) Engine switch off 108 to 132 Ω

    NG

    CHECK FOR SHORT IN CAN BUS WIRE (COMBINATION METER) Click here

    OK

  28. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 5 J/C - YAW RATE AND ACCELERATION SENSOR)


    1. A01CBZBE05
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Yaw Rate and Acceleration Sensor)

      Disconnect the connector of the yaw rate and acceleration sensor.

    2. A01CFKWE16
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      M22-5 (CANH) - M22-16 (CANL) Engine switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 5 J/C - YAW RATE AND ACCELERATION SENSOR)

    OK

  29. CHECK FOR SHORT IN CAN BUS WIRE (YAW RATE AND ACCELERATION SENSOR)


    1. Reconnect the connector of the CAN No. 5 junction connector (M22).

    2. A01CEZIE01
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G8-6 (CANH) - G8-14 (CANL) Engine switch off 54 to 69 Ω

    NG

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

    OK

    REPLACE YAW RATE AND ACCELERATION SENSOR Click here

  30. CHECK FOR SHORT IN CAN BUS WIRE (COMBINATION METER)


    1. A01CD9PE97
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Combination Meter)

      Disconnect the connector of the combination meter.

    2. A01CGINE17
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      M22-7 (CANH) - M22-18 (CANL) Engine switch off 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 5 J/C - COMBINATION METER)

    OK

    REPLACE COMBINATION METER Click here