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CAN COMMUNICATION SYSTEM Check Bus 5 Line for Short to +B

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DTC Code DTC Name
  Check Bus 5 Line for Short to +B
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DESCRIPTION

There may be a short circuit between one of the CAN bus lines and +B when there is no resistance between terminal 15 (CA5H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.

Symptom Trouble Area
There is no resistance between terminal 15 (CA5H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.

  • Short to +B in CAN main bus wire

  • Short to +B in CAN branch wire

  • Central gateway ECU (network gateway ECU)

  • Certification ECU (smart key ECU assembly)

  • Meter mirror Sub-assembly*1

  • Multiplex tilt and telescopic ECU

  • Main body ECU (multiplex network body ECU)

  • Air conditioning amplifier assembly

  • Headlight ECU sub-assembly LH

  • Front multiplex network door ECU LH

  • Position control ECU assembly

  • Front multiplex network door ECU RH

  • Rear power seat switch (rear multi operation panel)*2

  • No. 2 Position control ECU assembly

  • Headlight ECU sub-assembly RH

  • Combination meter assembly

  • No. 2 CAN junction connector

  • No. 10 CAN junction connector

  • No. 11 CAN junction connector
*1: w/ Headup Display System *2: w/ Rear Multi Operation Panel System
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WIRING DIAGRAM


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  1. B004XOWE05
    B004Y10E01

    for LHD

  2. B004XOWE06
    B004Y10E03

    for RHD

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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.

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  • Before measuring the resistance of the CAN bus, turn the power 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 (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

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

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  • Some parts must be initialized and set when replacing or removing and installing parts.

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

    DTC check procedure: Turn the power 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.

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  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

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.

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PROCEDURE


  1. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 11 CAN JUNCTION CONNECTOR)


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

    2. Disconnect the L116 No. 11 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
      L116-1 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher No. 2 CAN junction connector
      L116-7 (CANL) - G20-16 (BAT)
      L116-2 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Front multiplex network door ECU LH
      L116-8 (CANL) - G20-16 (BAT)
      L116-3 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher No. 10 CAN junction connector
      L116-9 (CANL) - G20-16 (BAT)
      L116-4 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      • Position control ECU assembly*1

      • No. 2 Position control ECU assembly*2
      L116-10 (CANL) - G20-16 (BAT)
      L116-5 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Rear power seat switch (rear multi operation panel)*3
      L116-11 (CANL) - G20-16 (BAT)
      L116-6 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Headlight ECU sub-assembly RH
      L116-12 (CANL) - G20-16 (BAT)
      *1: for LHD *2: for RHD *3: w/ Rear Multi Operation Panel System
      Result
      Result Proceed to
      OK A
      NG (No. 2 CAN junction connector CAN main wire) B
      NG (No. 10 CAN junction connector CAN main wire) C
      NG (Wire to ECU or sensor) D

  2. Click here

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


    1. Reconnect the L116 No. 11 CAN junction connector.

    2. Disconnect the G120 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
      G120-11 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      • Combination meter assembly*1

      • Central gateway EUC (network gateway ECU)*2
      G120-1 (CANL) - G20-16 (BAT)
      G120-12 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      • Meter mirror Sub-assembly*3

      • Certification ECU (smart key ECU assembly)*2
      G120-2 (CANL) - G20-16 (BAT)
      G120-13 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      • Certification ECU (smart key ECU assembly)*1

      • Meter mirror Sub-assembly*4
      G120-3 (CANL) - G20-16 (BAT)
      G120-14 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      • Air conditioning amplifier assembly*1

      • Multiplex tilt and telescopic ECU*2
      G120-4 (CANL) - G20-16 (BAT)
      G120-15 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Main body ECU (multiplex network body ECU)
      G120-5 (CANL) - G20-16 (BAT)
      G120-16 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      • Multiplex tilt and telescopic ECU*1

      • Air conditioning amplifier assembly*2
      G120-6 (CANL) - G20-16 (BAT)
      G120-17 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher No. 11 CAN junction connector
      G120-7 (CANL) - G20-16 (BAT)
      G120-18 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Headlight ECU sub-assembly LH
      G120-8 (CANL) - G20-16 (BAT)
      *1: for LHD *2: for RHD *3: for LHD with Headup Display System *4: for RHD with Headup Display System
      Result
      Result Proceed to
      OK A
      NG (Central gateway EUC [network gateway ECU] CAN main wire) B
      NG (No. 11 CAN junction connector CAN main wire) C
      NG (Wire to ECU or sensor) D

    • A

      REPLACE NO. 2 CAN JUNCTION CONNECTOR

    • BClick here
    • C

      REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    • DClick here

      GO TO STEP 6

  3. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 2 CAN JUNCTION CONNECTOR)


    1. Reconnect the G120 No. 2 CAN junction connector.

    2. Disconnect the G66 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
      G66-15 (CA5H) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      G66-16 (CA5L) - G20-16 (BAT)
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)Click here

    • NG

      REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 2 CAN JUNCTION CONNECTOR)

  4. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (NO. 10 CAN JUNCTION CONNECTOR)


    1. Reconnect the L116 No. 11 CAN junction connector.

    2. Disconnect the L115 No. 10 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
      L115-1 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Front multiplex network door ECU RH
      L115-7 (CANL) - G20-16 (BAT)
      L115-2 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      • No. 2 position control ECU assembly*1

      • Position control ECU assembly*2
      L115-8 (CANL) - G20-16 (BAT)
      L115-3 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      • Central gateway EUC (network gateway ECU)*1

      • Combination meter assembly*2
      L115-9 (CANL) - G20-16 (BAT)
      L115-4 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher No. 11 CAN junction connector
      L115-10 (CANL) - G20-16 (BAT)
      *1: for LHD *2: for RHD
      Result
      Result Proceed to
      OK A
      NG (No. 11 CAN junction connector CAN main wire) B
      NG (Central gateway ECU [network gateway ECU] CAN main wire) C
      NG (Wire to ECU or sensor) D

    • A

      REPLACE NO. 10 CAN JUNCTION CONNECTOR

    • B

      REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    • CClick here
    • DClick here

      GO TO STEP 6

  5. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 10 CAN JUNCTION CONNECTOR)


    1. Reconnect the L115 No. 10 CAN junction connector.

    2. Disconnect the G66 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
      G66-15 (CA5H) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      G66-16 (CA5L) - G20-16 (BAT)
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)Click here

    • NG

      REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 10 CAN JUNCTION CONNECTOR)

  6. Click here

    CHECK FOR SHORT TO B+ IN CAN BUS WIRE (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

    2. B004T3JC22
      *a

      Component with harness connected

      (Central Gateway ECU [Network Gateway ECU])

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G66-15 (CA5H) - G20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      G66-16 (CA5L) - G20-16 (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.

      • If the resistance does not become normal when the connector is disconnected from the ECU or sensor, check for a short to +B in the wire harness and repair or replace the wire harness or connector if necessary.

      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE ECU OR SENSOR

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR