CAN COMMUNICATION SYSTEM Open in Bus 5 Main Bus Line

DESCRIPTION

There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.

Symptom Trouble Area
Resistance between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.

  • CAN main bus wire or connector

  • Combination meter assembly

  • Central gateway ECU (network gateway ECU)

  • No. 1 CAN junction connector

  • No. 10 CAN junction connector

  • No. 11 CAN junction connector

This malfunction is not related to the lines of a CAN branch or to ECUs or sensors connected to a CAN branch.

WIRING DIAGRAM


  1. for LHD

    B004AVIE02

  2. for RHD

    B004AVIE03

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 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.

    Click here

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

    Click here

  • 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.

    Click here

  • 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.

Tech Tips


  • 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.

PROCEDURE


  1. CHECK FOR OPEN IN CAN BUS WIRE (COMBINATION METER ASSEMBLY - NO. 1 CAN JUNCTION CONNECTOR)


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

    2. B004AFTC04
      *a

      Front view of wire harness connector

      (to Combination Meter Assembly)

      Disconnect the combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P25-29 (CANH) - P25-30 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

    C

    CONNECT CONNECTOR Click here

    B

  2. CONNECT CONNECTOR


    1. Reconnect the P25 combination meter assembly connector.

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK FOR OPEN IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 10 CAN JUNCTION CONNECTOR)


    1. B004BXLC18
      *a

      Front view of wire harness connector

      (to Central Gateway ECU [Network Gateway ECU])

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P59-15 (CA5H) - P59-16 (CA5L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) Click here

    NG

  4. CONNECT CONNECTOR


    1. Reconnect the P59 central gateway ECU (network gateway ECU) connector.

      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK FOR OPEN IN CAN BUS WIRE (NO. 10 CAN JUNCTION CONNECTOR)

    Tech Tips


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

    • Reconnect the connector to its original position.


    1. Disconnect the No. 10 CAN junction connectors.

      B004B9NC08
      *1 No. 10 CAN Junction Connector - -
      *a

      Rear view of wire harness connector

      (to No. 10 CAN Junction Connector)

      		 - -
      Wiring Color
      Code Color (CANH Side) Color (CANL Side) Connect to
      X85 R W No. 11 CAN junction connector
      X86 V W Central gateway ECU (network gateway ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      X85-1 (CANH) - X85-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 CAN junction connector
      X86-1 (CANH) - X86-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)
      Result
      Result Proceed to
      OK A
      NG (Central gateway ECU [network gateway ECU] CAN main wire) B
      NG (No. 11 CAN junction connector CAN main wire) C

    A

    REPLACE NO. 10 CAN JUNCTION CONNECTOR

    B

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

    C

  6. CONNECT CONNECTOR


    1. Reconnect the No. 10 CAN junction connectors.

      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK FOR OPEN IN CAN BUS WIRE (NO. 11 CAN JUNCTION CONNECTOR)

    Tech Tips


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

    • Reconnect the connector to its original position.


    1. Disconnect the No. 11 CAN junction connectors.

      B004CHAC13
      *1 No. 11 CAN Junction Connector - -
      *a

      Rear view of wire harness connector

      (to No. 11 CAN Junction Connector)

      		 - -
      Wiring Color
      Code Color (CANH Side) Color (CANL Side) Connect to
      X88 R W No. 10 CAN junction connector
      X93 V W No. 1 CAN junction connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      X88-1 (CANH) - X88-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 10 CAN junction connector
      X93-1 (CANH) - X93-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 1 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 10 CAN junction connector CAN main wire) B
      NG (No. 1 CAN junction connector CAN main wire) C

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

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

    C

  8. CONNECT CONNECTOR


    1. Reconnect the No. 11 CAN junction connectors.

      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK FOR OPEN IN CAN BUS WIRE (NO. 1 CAN JUNCTION CONNECTOR)


    1. B004CJAC23
      *a

      Front view of wire harness connector

      (to No. 1 CAN junction connector)
      *b to No. 11 CAN Junction Connector
      *c to Combination Meter Assembly

      Disconnect the No. 1 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      P107-1 (CANH) - P107-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 CAN junction connector
      P107-4 (CANH) - P107-15 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Combination meter assembly
      Result
      Result Proceed to
      OK A
      NG (No. 11 CAN junction connector CAN main wire) B
      NG (Combination meter assembly CAN main wire) C

    A

    REPLACE NO. 1 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - NO. 11 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

  10. CONNECT CONNECTOR


    1. Reconnect the P25 combination meter assembly connector.

      Result
      Proceed to
      NEXT

    NEXT

  11. CHECK FOR OPEN IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 11 CAN JUNCTION CONNECTOR)


    1. B004BXLC18
      *a

      Front view of wire harness connector

      (to Central Gateway ECU [Network Gateway ECU])

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P59-15 (CA5H) - P59-16 (CA5L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) Click here

    NG

  12. CONNECT CONNECTOR


    1. Reconnect the P59 central gateway ECU (network gateway ECU) connector.

      Result
      Proceed to
      NEXT

    NEXT

  13. CHECK FOR OPEN IN CAN BUS WIRE (NO. 11 CAN JUNCTION CONNECTOR)

    Tech Tips


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

    • Reconnect the connector to its original position.


    1. Disconnect the No. 11 CAN junction connectors.

      B004CHAC24
      *1 No. 11 CAN Junction Connector - -
      *a

      Rear view of wire harness connector

      (to No. 11 CAN Junction Connector)

      		 - -
      Wiring Color
      Code Color (CANH Side) Color (CANL Side) Connect to
      X88 R W No. 10 CAN junction connector
      X92 V W Central gateway ECU (network gateway ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      X88-1 (CANH) - X88-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 10 CAN junction connector
      X92-1 (CANH) - X92-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)
      Result
      Result Proceed to
      OK A
      NG (Central gateway ECU [network gateway ECU] CAN main wire) B
      NG (No. 10 CAN junction connector CAN main wire) C

    A

    REPLACE NO. 11 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU])

    C

  14. CONNECT CONNECTOR


    1. Reconnect the No. 11 CAN junction connectors.

      Result
      Proceed to
      NEXT

    NEXT

  15. CHECK FOR OPEN IN CAN BUS WIRE (NO. 10 CAN JUNCTION CONNECTOR)

    Tech Tips


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

    • Reconnect the connector to its original position.


    1. Disconnect the No. 10 CAN junction connectors.

      B004B9NC12
      *1 No. 10 CAN Junction Connector - -
      *a

      Rear view of wire harness connector

      (to No. 10 CAN Junction Connector)

      		 - -
      Wiring Color
      Code Color (CANH Side) Color (CANL Side) Connect to
      X85 R W No. 11 CAN junction connector
      X87 V W No. 1 CAN junction connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      X85-1 (CANH) - X85-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 11 CAN junction connector
      X87-1 (CANH) - X87-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 1 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 11 CAN junction connector CAN main wire) B
      NG (No. 1 CAN junction connector CAN main wire) C

    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)

    C

  16. CONNECT CONNECTOR


    1. Reconnect the No. 10 CAN junction connectors.

      Result
      Proceed to
      NEXT

    NEXT

  17. CHECK FOR OPEN IN CAN BUS WIRE (NO. 1 CAN JUNCTION CONNECTOR)


    1. B004CJAC23
      *a

      Front view of wire harness connector

      (to No. 1 CAN junction connector)
      *b to No. 10 CAN Junction Connector
      *c to Combination Meter Assembly

      Disconnect the No. 1 CAN junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      P107-1 (CANH) - P107-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 10 CAN junction connector
      P107-4 (CANH) - P107-15 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Combination meter assembly
      Result
      Result Proceed to
      OK A
      NG (No. 10 CAN junction connector CAN main wire) B
      NG (Combination meter assembly CAN main wire) C

    A

    REPLACE NO. 1 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)