Click here

CAN COMMUNICATION SYSTEM Check Bus 2 Line for Short to +B

Click here
Click here
DTC Code DTC Name
  Check Bus 2 Line for Short to +B
Click here

DESCRIPTION

There may be a short circuit between one of the CAN bus lines and +B when there is no resistance between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.

Symptom Trouble Area
There is no resistance between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.

  • Short to +B in CAN main bus line

  • Short to +B in CAN branch line

  • Central gateway ECU (network gateway ECU)

  • ECM

  • Combination meter assembly

  • Air conditioning amplifier assembly

  • Power steering ECU assembly

  • Certification ECU (smart key ECU assembly)

  • Airbag ECU assembly

  • Yaw rate sensor

  • Main body ECU (multiplex network body ECU)

  • Skid control ECU (brake actuator assembly)

  • Steering sensor

  • Stereo component equalizer assembly

  • Torque vectoring differential ECU assembly (w/ Torque Vectoring Differential System)

  • Spoiler control ECU assembly

  • No. 1 CAN junction connector

  • No. 2 CAN junction connector
B0067HVE02
Figure 2. for RHD: B0065B5E02
B0067P4E01
Figure 1. for LHD:
Click here

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Note:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here

  • Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

    Click here

  • Before replacing the ECM, main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Service Bulletin.

Tip:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.

  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

Click here

PROCEDURE


  1. Click here

    CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for LHD A
      for RHD B

  2. Click here

    CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 1 CAN JUNCTION CONNECTOR)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B0067ZLC01
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 1 CAN Junction Connector)

      		 *b to No. 2 CAN Junction Connector
      *c to Combination Meter Assembly *d to Central Gateway ECU (Network Gateway ECU)
      *e to Air Conditioning Amplifier Assembly *f

      to Torque Vectoring Differential ECU Assembly

      (w/ Torque Vectoring Differential System)
      *g to Certification ECU (Smart Key ECU Assembly) *h to Stereo Component Equalizer Assembly
      *i to Power Steering ECU Assembly - -

      Disconnect the O104 No. 1 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O104-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher No. 2 CAN junction connector
      O104-11 (CANL) - O8-16 (BAT)
      O104-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Combination meter assembly
      O104-12 (CANL) - O8-16 (BAT)
      O104-4 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Central gateway ECU (network gateway ECU)
      O104-14 (CANL) - O8-16 (BAT)
      O104-5 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Air conditioning amplifier assembly
      O104-15 (CANL) - O8-16 (BAT)
      O104-6 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Torque vectoring differential ECU assembly*
      O104-16 (CANL) - O8-16 (BAT)
      O104-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Certification ECU (smart key ECU assembly)
      O104-17 (CANL) - O8-16 (BAT)
      O104-8 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Stereo component equalizer assembly
      O104-18 (CANL) - O8-16 (BAT)
      O104-9 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Power steering ECU assembly
      O104-19 (CANL) - O8-16 (BAT)

      • *: w/ Torque Vectoring Differential System

      Result
      Result Proceed to
      OK A
      NG (Line to No. 2 CAN junction connector) B
      NG (Line to central gateway ECU (network gateway ECU)) C
      NG (Line to ECU or sensor) D

  3. Click here

    CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR)


    1. Reconnect the O104 No. 1 CAN junction connector.

    2. B0067ZLC05
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Connector)

      		 *b to No. 1 CAN Junction Connector
      *c to Main Body ECU (Multiplex Network Body ECU) *d to ECM
      *e to Airbag ECU Assembly *f to Yaw Rate Sensor
      *g to Spoiler Control ECU Assembly *h to Steering Sensor
      *i to Skid Control ECU (Brake Actuator Assembly) - -

      Disconnect the O105 No. 2 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O105-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher No. 1 CAN junction connector
      O105-11 (CANL) - O8-16 (BAT)
      O105-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Main body ECU (multiplex network body ECU)
      O105-12 (CANL) - O8-16 (BAT)
      O105-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher ECM
      O105-13 (CANL) - O8-16 (BAT)
      O105-5 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Airbag ECU assembly
      O105-15 (CANL) - O8-16 (BAT)
      O105-6 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Yaw rate sensor
      O105-16 (CANL) - O8-16 (BAT)
      O105-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Spoiler control ECU assembly
      O105-17 (CANL) - O8-16 (BAT)
      O105-9 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Steering sensor
      O105-19 (CANL) - O8-16 (BAT)
      O105-10 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Skid control ECU (brake actuator assembly)
      O105-20 (CANL) - O8-16 (BAT)
      Result
      Result Proceed to
      OK A
      NG (Line to No. 1 CAN junction connector) B
      NG (Line to ECU or sensor) C

    • A

      REPLACE NO. 2 CAN JUNCTION CONNECTOR

    • B

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

    • CClick here

      GO TO STEP 8

  4. Click here

    CHECK FOR SHORT TO +B IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))


    1. Reconnect the O104 No. 1 CAN junction connector.

    2. B0065JAC31
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Central Gateway ECU (Network Gateway ECU))

      		 - -

      Disconnect the O145 central gateway ECU (network gateway ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O145-18 (CA4H) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      O145-17 (CA4L) - O8-16 (BAT)
      Result
      Result
      OK
      NG

    • OK

      REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)Click here

    • NG

      REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

  5. Click here

    CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 1 CAN JUNCTION CONNECTOR)


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B0067ZLC06
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 1 CAN Junction Connector)

      		 *b to No. 2 CAN Junction Connector
      *c to Combination Meter Assembly *d to Airbag ECU Assembly
      *e

      to Torque Vectoring Differential ECU Assembly

      (w/ Torque Vectoring Differential System)

      		 *f to Steering Sensor
      *g to Stereo Component Equalizer Assembly *h to Skid Control ECU (Brake Actuator Assembly)

      Disconnect the O104 No. 1 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O104-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher No. 2 CAN junction connector
      O104-11 (CANL) - O8-16 (BAT)
      O104-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Combination meter assembly
      O104-12 (CANL) - O8-16 (BAT)
      O104-4 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Airbag ECU assembly
      O104-14 (CANL) - O8-16 (BAT)
      O104-6 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Torque vectoring differential ECU assembly*
      O104-16 (CANL) - O8-16 (BAT)
      O104-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Steering sensor
      O104-17 (CANL) - O8-16 (BAT)
      O104-8 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Stereo component equalizer assembly
      O104-18 (CANL) - O8-16 (BAT)
      O104-9 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Skid control ECU (brake actuator assembly)
      O104-19 (CANL) - O8-16 (BAT)

      • *: w/ Torque Vectoring Differential System

      Result
      Result Proceed to
      OK A
      NG (Line to No. 2 CAN junction connector) B
      NG (Line to ECU or sensor) C

  6. Click here

    CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR)


    1. Reconnect the O104 No. 1 CAN junction connector.

    2. B0067ZLC07
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Connector)

      		 *b to No. 1 CAN Junction Connector
      *c to Main Body ECU (Multiplex Network Body ECU) *d to ECM
      *e to Central Gateway ECU (Network Gateway ECU) *f to Air Conditioning Amplifier Assembly
      *g to Yaw Rate Sensor *h to Certification ECU (Smart Key ECU Assembly)
      *i to Spoiler Control ECU Assembly *j to Power Steering ECU Assembly

      Disconnect the O105 No. 2 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      O105-1 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher No. 1 CAN junction connector
      O105-11 (CANL) - O8-16 (BAT)
      O105-2 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Main body ECU (multiplex network body ECU)
      O105-12 (CANL) - O8-16 (BAT)
      O105-3 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher ECM
      O105-13 (CANL) - O8-16 (BAT)
      O105-5 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Central gateway ECU (network gateway ECU)
      O105-15 (CANL) - O8-16 (BAT)
      O105-6 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Air conditioning amplifier assembly
      O105-16 (CANL) - O8-16 (BAT)
      O105-7 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Yaw rate sensor
      O105-17 (CANL) - O8-16 (BAT)
      O105-8 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Certification ECU (smart key ECU assembly)
      O105-18 (CANL) - O8-16 (BAT)
      O105-9 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Spoiler control ECU assembly
      O105-19 (CANL) - O8-16 (BAT)
      O105-10 (CANH) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Power steering ECU assembly
      O105-20 (CANL) - O8-16 (BAT)
      Result
      Result Proceed to
      OK A
      NG (Line to No. 1 CAN junction connector) B
      NG (Line to central gateway ECU (network gateway ECU)) C
      NG (Line to ECU or sensor) D

    • A

      REPLACE NO. 2 CAN JUNCTION CONNECTOR

    • B

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

    • CClick here
    • DClick here
  7. Click here

    CHECK FOR SHORT TO +B IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))


    1. Reconnect the O105 No. 2 CAN junction connector.

    2. B0065JAC31
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Central Gateway ECU (Network Gateway ECU))

      		 - -

      Disconnect the O145 central gateway ECU (network gateway ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O145-18 (CA4H) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      O145-17 (CA4L) - O8-16 (BAT)
      Result
      Result
      OK
      NG

    • OK

      REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)Click here

    • NG

      REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

  8. Click here

    CHECK FOR SHORT TO +B IN CAN BUS LINE (ECU OR SENSOR)


    1. Reconnect all wire harness connectors.

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

      Click here

    3. B00680BC41
      *1 DLC3 - -
      *a

      Component with harness connected

      (Central Gateway ECU (Network Gateway ECU))

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O145-18 (CA4H) - O8-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      O145-17 (CA4L) - O8-16 (BAT)
      Tip:

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

      Result
      Result
      OK
      NG

    • OK

      REPLACE ECU OR SENSOR

    • NG

      REPAIR OR REPLACE ECU OR SENSOR CAN BUS LINE OR CONNECTOR