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

DESCRIPTION

There may be a short circuit between one of the CAN bus wires and +B when no resistance exists between terminals 6 (CANH) and 16 (BAT) or 14 (CANL) and 16 (BAT) of the DLC3.

Symptom Trouble Area
No resistance exists between terminals 6 (CANH) and 16 (BAT) or 14 (CANL) and 16 (BAT) of the DLC3.

  • Short to +B in CAN bus main wire

  • Short to +B 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 (Passenger side junction block)

  • ECM

  • AFS ECU*1

  • CAN junction connector CTR

  • CAN No. 1 junction connector RH

  • CAN No. 2 junction connector

  • CAN No. 5 junction connector

Tech Tips

*1: w/ AFS

WIRING DIAGRAM

Refer to Check CAN Bus Lines for Short Circuit Click here.

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 TO +B IN CAN BUS WIRE (DLC3 BRANCH WIRE)


    1. Turn the engine switch off.

    2. A01CET0E06
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN No. 1 Junction Connector RH)

      Disconnect the CAN branch wire connector (G66) 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. A01CEZIE03
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-6 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G8-14 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3

    OK

  2. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 1 J/C RH - CAN NO. 5 J/C)


    1. Reconnect the CAN branch wire connector (G66) to the CAN No. 1 junction connector RH (w/o earth terminal).

    2. A01CFC1E16
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN No. 1 Junction Connector RH)

      Disconnect the CAN main wire connector (G69) 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. A01CEZIE03
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-6 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G8-14 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      Result
      Result Proceed to
      The resistance between terminals 6 (CANH) and 16 (BAT), or the resistance between 14 (CANL) and 16 (BAT) is still below 6 kΩ when the specified connector is disconnected from the CAN junction connector. (There is a short to +B in the bus wires.) A
      The resistance between terminals 6 (CANH) and 16 (BAT), or the resistance between 14 (CANL) and 16 (BAT) becomes normal (6 kΩ or higher) when a connector is disconnected from the CAN junction connector. (There is a short to +B in the disconnected bus wires.) B

    B

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

    A

  3. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 1 J/C RH - CAN J/C CTR)


    1. Reconnect the CAN main wire connector (G69) to the CAN No. 1 junction connector RH (w/o earth terminal).

    2. A01CB89E08
      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. A01CEZIE03
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-6 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G8-14 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      Result
      Result Proceed to
      The resistance between terminals 6 (CANH) and 16 (BAT), or the resistance between 14 (CANL) and 16 (BAT) is still below 6 kΩ when the specified connector is disconnected from the CAN junction connector. (There is a short to +B in the bus wires.) A
      The resistance between terminals 6 (CANH) and 16 (BAT), or the resistance between 14 (CANL) and 16 (BAT) becomes normal (6 kΩ or higher) when a connector is disconnected from the CAN junction connector. (There is a short to +B in the disconnected bus wires.) B

    B

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

    A

  4. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 1 J/C RH)


    1. A01CEZIE03
      Text in Illustration
      *1 DLC3

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

    2. While observing the resistance value shown on the tester, disconnect connector (G65) from the CAN No. 1 junction connector RH one by one until the resistance becomes normal (6 kΩ or higher).

      Tech Tips

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

      A01CFGME01
      for CAN Junction Connector B Side
      Terminal No. (Symbol) Wiring Color Connected to
      G65-1 (CANH) SB Power steering ECU
      G65-2 (CANL) W
      G66-1 (CANH) GR DLC3
      G66-2 (CANL) W
      G67-1 (CANH) SB CAN junction connector CTR
      G67-2 (CANL) W
      G69-1 (CANH) B CAN No. 5 junction connector
      G69-2 (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 to +B in 2 or more branch wires.

      Result
      Result Proceed to
      The resistance between terminals 6 (CANH) and 16 (BAT), or the resistance between 14 (CANL) and 16 (BAT) is still below 6 kΩ when all the specified connectors are disconnected from the CAN junction connector. (There is no short to +B in the branch wires.) A
      The resistance between terminals 6 (CANH) and 16 (BAT), or the resistance between 14 (CANL) and 16 (BAT) becomes normal (6 kΩ or higher) when a connector is disconnected from the CAN junction connector. (There is a short to +B in one of the areas related to one or more of the disconnected branch wires.) B

    3. When there is a short to +B 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 bus wire that is shorted to +B). Check that the resistance shown on the tester becomes normal (6 kΩ or higher) to confirm that there is a short to +B 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 TO +B IN CAN BUS WIRE Click here

    A

    REPLACE CAN NO. 1 JUNCTION CONNECTOR RH

  5. CHECK FOR SHORT TO +B IN CAN BUS WIRE


    1. Reconnect the connector for the bus wire that is shorted to +B to the CAN junction connector (the connector that caused the bus wire resistance to change to 6 kΩ or higher when it was disconnected).

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU to which the bus wire shorted to +B is connected.

    3. A01CEZIE03
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-6 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G8-14 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Tech Tips

      If the resistance changes to 6 kΩ or higher when the connector is disconnected from the ECU, there may be a short to +B in the ECU.


    NG

    REPAIR OR REPLACE CORRESPONDING ECU BRANCH WIRE OR CONNECTOR

    OK

    REPLACE CORRESPONDING ECU

  6. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 1 J/C RH - CAN NO. 5 J/C)


    1. Reconnect the CAN main wire connector (G69) to the CAN No. 1 junction connector RH (w/o earth terminal).

    2. A01CB2XE01
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      M22-6 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      M22-17 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

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

    OK

  7. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 5 J/C - COMBINATION METER)


    1. A01CB2XE02
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      M22-7 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      M22-18 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

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

    OK

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


    1. A01CB2XE03
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      M22-5 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      M22-16 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

    CHECK FOR SHORT TO +B IN CAN BUS WIRE (YAW RATE AND ACCELERATION SENSOR) Click here

    OK

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

  9. CHECK FOR SHORT TO +B IN CAN BUS WIRE (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. A01CB2XE03
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      M22-5 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      M22-16 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

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

    OK

    REPLACE YAW RATE AND ACCELERATION SENSOR Click here

  10. CHECK FOR SHORT TO +B 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. A01CB2XE02
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      M22-7 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      M22-18 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ 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

  11. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 1 J/C RH - CAN J/C CTR)


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

    2. A01CDVFE07
      Text in Illustration
      *1 DLC3
      *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.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G62-1 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G62-2 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

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

    OK

  12. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN J/C CTR - CAN NO. 2 J/C)


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

    2. A01CDQOE07
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G61-1 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G61-2 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

    CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN J/C CTR - CAN NO. 2 J/C) Click here

    OK

  13. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN J/C CTR)


    1. A01CEZIE03
      Text in Illustration
      *1 DLC3

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

    2. While observing the resistance value shown on the tester, disconnect connectors (G63 and G64) from the CAN junction connector CTR one by one until the resistance becomes normal (6 kΩ or higher).

      Tech Tips

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

      A01CB33E03
      for CAN Junction Connector B Side
      Terminal No. (Symbol) Wiring Color Connected to
      G61-1 (CANH) B CAN No. 2 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
      G64-1 (CANH) BR Steering angle sensor
      G64-2 (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 to +B in 2 or more branch wires.

      Result
      Result Proceed to
      The resistance between terminals 6 (CANH) and 16 (BAT), or the resistance between 14 (CANL) and 16 (BAT) is still below 6 kΩ when all the specified connectors are disconnected from the CAN junction connector. (There is no short to +B in the branch wires.) A
      The resistance between terminals 6 (CANH) and 16 (BAT), or the resistance between 14 (CANL) and 16 (BAT) becomes normal (6 kΩ or higher) when a connector is disconnected from the CAN junction connector. (There is a short to +B in one of the areas related to one or more of the disconnected branch wires.) B

    3. When there is a short to +B 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 bus wire that is shorted to +B). Check that the resistance shown on the tester becomes normal (6 kΩ or higher) to confirm that there is a short to +B 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 TO +B IN CAN BUS WIRE Click here

    A

    REPLACE CAN JUNCTION CONNECTOR CTR

  14. CHECK FOR SHORT TO +B IN CAN BUS WIRE


    1. Reconnect the connector for the bus wire that is shorted to +B to the CAN junction connector (the connector that caused the bus wire resistance to change to 6 kΩ or higher when it was disconnected).

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus wire shorted to +B is connected.

    3. A01CEZIE03
      Text in Illustration
      *1 DLC3

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G8-6 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G8-14 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Tech Tips

      If the resistance changes to 6 kΩ or higher when the connector is disconnected from the ECU or sensor, there may be a short to +B in the ECU or sensor.


    NG

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH WIRE OR CONNECTOR

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

  15. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN J/C CTR - CAN NO. 2 J/C)


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

    2. A01CD0ME82
      Text in Illustration
      *1 DLC3
      *a

      Front view of wire harness connector

      (to CAN No. 2 Junction Connector)

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G56-5 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-16 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

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

    OK

  16. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 2 J/C - ECM)


    1. A01CD0ME83
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-1 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-12 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

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

    OK

  17. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 2 J/C - SKID CONTROL ECU)


    1. A01CD0ME84
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-2 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-13 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

    CHECK FOR SHORT TO +B IN CAN BUS WIRE (SKID CONTROL ECU) Click here

    OK

  18. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 2 J/C - AIR CONDITIONING AMPLIFIER)


    1. A01CD0ME85
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-4 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-15 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

    CHECK FOR SHORT TO +B IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER) Click here

    OK

  19. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CAN NO. 2 J/C - AFS ECU)

    Tech Tips

    For vehicles without a headlight swivel ECU (AFS ECU), go to "CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 2 J/C - MAIN BODY ECU)".


    1. A01CE0RE01
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-7 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-18 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (AFS ECU) Click here

    OK

  20. CHECK FOR SHORT TO +B IN CAN BUS WIRE (CAN NO. 2 J/C - MAIN BODY ECU)


    1. A01CD0ME86
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-3 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-14 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

    CHECK FOR SHORT TO +B IN CAN BUS WIRE (MAIN BODY ECU) Click here

    OK

    REPLACE CAN NO. 2 JUNCTION CONNECTOR

  21. CHECK FOR SHORT TO +B IN CAN BUS WIRE (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. A01CD0ME84
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-2 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-13 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

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

    OK

    REPLACE BRAKE ACTUATOR (SKID CONTROL ECU) Click here

  22. CHECK FOR SHORT TO +B IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER)


    1. A01CD9PE98
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Air Conditioning Amplifier)

      Disconnect the connector of the air conditioning amplifier.

    2. A01CD0ME85
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-4 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-15 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

    REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - AIR CONDITIONING AMPLIFIER)

    OK

    REPLACE AIR CONDITIONING AMPLIFIER Click here

  23. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (AFS ECU)


    1. A01CG90E40
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Headlight Swivel ECU)

      Disconnect the connector of the headlight swivel ECU (AFS ECU).

    2. A01CE0RE01
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-7 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-18 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

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

    OK

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY (AFS ECU) Click here

  24. CHECK FOR SHORT TO +B IN CAN BUS WIRE (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. A01CD0ME86
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-3 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-14 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

    NG

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

    OK

    REPLACE MAIN BODY ECU (PASSENGER SIDE JUNCTION BLOCK) Click here

  25. CHECK FOR SHORT TO +B 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. A01CD0ME83
      Text in Illustration
      *1 DLC3
      *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 Condition Specified Condition
      G56-1 (CANH) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      G56-12 (CANL) - G8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ 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. 2 J/C - ECM)

    A

    REPLACE ECM (for 2AZ-FE) Click here