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CAN COMMUNICATION SYSTEM Open in Bus 5 Main Bus Line

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DTC Code DTC Name
  Open in Bus 5 Main Bus Line
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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 central gateway ECU (network gateway ECU) is 70 Ω or higher.

  • CAN main bus line or connector

  • Central gateway ECU (network gateway ECU)

  • No. 2 CAN junction terminal

  • No. 12 CAN junction connector

  • No. 13 CAN junction connector (for LHD)

  • No. 16 CAN junction connector (for LHD)

  • No. 14 CAN junction connector (for RHD)

  • No. 15 CAN junction connector (for RHD)

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

Figure 2. for RHD B006552E02
Figure 1. for LHD
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WIRING DIAGRAM

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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 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.

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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 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.

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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 VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for LHD A
      for RHD B

  2. Click here

    CHECK FOR OPEN IN CAN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR)


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

    2. B0065DPC30
      *a

      Front view of wire harness connector

      (to No. 16 CAN Junction Connector)
      *b to No. 13 CAN Junction Connector
      *c to No. 12 CAN Junction Connector

      Disconnect the O171 No. 16 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
      O171-1 (CANH) - O171-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 13 CAN junction connector
      O171-6 (CANH) - O171-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 12 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Line to No. 13 CAN junction connector) B
      NG (Line to No. 12 CAN junction connector) C

  3. Click here

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


    1. Reconnect the O171 No. 16 CAN junction connector.

    2. B0066WSC03
      *a

      Rear view of wire harness connector

      (to No. 13 CAN Junction Connector)

      		 *b to Central Gateway ECU (Network Gateway ECU)
      *c to No. 16 CAN Junction Connector - -

      Disconnect the O152 and O153 No. 13 CAN junction connectors.

      Table 1. Wiring Color:
      Code Color (CANH Side) Color (CANL Side) Connected to
      O152 GR B Central gateway ECU (network gateway ECU)
      O153 LG B No. 16 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
      O152-1 (CANH) - O152-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)
      O153-1 (CANH) - O153-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 16 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Line to central gateway ECU (network gateway ECU)) B
      NG (Line to No. 16 CAN junction connector) C

    • A

      REPLACE NO. 13 CAN JUNCTION CONNECTOR

    • BClick here
    • C

      REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - NO. 16 CAN JUNCTION CONNECTOR)

  4. Click here

    CHECK FOR OPEN IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))


    1. Reconnect the O152 and O153 No. 13 CAN junction connectors.

    2. B0065T7C74
      *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
      O145-15 (CA5H) - O145-16 (CA5L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    • OK

      REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)Click here

    • NG

      REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 13 CAN JUNCTION CONNECTOR)

  5. Click here

    CHECK FOR OPEN IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR)


    1. Reconnect the O171 No. 16 CAN junction connector.

    2. B0065DPC18
      *a

      Front view of wire harness connector

      (to No. 12 CAN Junction Connector)
      *b to No. 16 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal

      Disconnect the U57 No. 12 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
      U57-3 (CANH) - U57-9 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 16 CAN junction connector
      U57-4 (CANH) - U57-10 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal
      Result
      Result Proceed to
      OK A
      NG (Line to No. 16 CAN junction connector) B
      NG (Line to No. 2 CAN junction terminal) C

    • A

      REPLACE NO. 12 CAN JUNCTION CONNECTOR

    • B

      REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - NO. 16 CAN JUNCTION CONNECTOR)

    • CClick here
  6. Click here

    CHECK FOR OPEN IN CAN BUS LINES (NO. 2 CAN JUNCTION TERMINAL)


    1. Reconnect the U57 No. 12 CAN junction connector.

    2. Disconnect the O102 No. 2 CAN junction terminal connector.

    3. B006714C88
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O102-3 (CANH) - O102-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    • OK

      REPLACE NO. 2 CAN JUNCTION TERMINAL

    • NG

      REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION TERMINAL - NO. 12 CAN JUNCTION CONNECTOR)

  7. Click here

    CHECK FOR OPEN IN CAN BUS LINES (NO. 14 CAN JUNCTION CONNECTOR)


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

    2. B0066JGC04
      *a

      Rear view of wire harness connector

      (to No. 14 CAN Junction Connector)

      		 *b to No. 15 CAN Junction Connector
      *c to No. 12 CAN Junction Connector - -

      Disconnect the O156 and O160 No. 14 CAN junction connectors.

      Table 2. Wiring Color:
      Code Color (CANH Side) Color (CANL Side) Connected to
      O156 LG B No. 15 CAN junction connector
      O160 BE B No. 12 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
      O156-1 (CANH) - O156-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 15 CAN junction connector
      O160-1 (CANH) - O160-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 12 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Line to No. 15 CAN junction connector) B
      NG (Line to No. 12 CAN junction connector) C

  8. Click here

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


    1. Reconnect the O156 and O160 No. 14 CAN junction connectors.

    2. B0065DPC31
      *a

      Front view of wire harness connector

      (to No. 15 CAN Junction Connector)
      *b to Central Gateway ECU (Network Gateway ECU)
      *c to No. 14 CAN Junction Connector

      Disconnect the O170 No. 15 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
      O170-3 (CANH) - O170-9 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)
      O170-4 (CANH) - O170-10 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 14 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Line to central gateway ECU (network gateway ECU)) B
      NG (Line to No. 14 CAN junction connector) C

    • A

      REPLACE NO. 15 CAN JUNCTION CONNECTOR

    • BClick here
    • C

      REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 14 CAN JUNCTION CONNECTOR - NO. 15 CAN JUNCTION CONNECTOR)

  9. Click here

    CHECK FOR OPEN IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))


    1. Reconnect the O170 No. 15 CAN junction connector.

    2. B0065T7C74
      *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
      O145-15 (CA5H) - O145-16 (CA5L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    • OK

      REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)Click here

    • NG

      REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 15 CAN JUNCTION CONNECTOR)

  10. Click here

    CHECK FOR OPEN IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR)


    1. Reconnect the O156 and O160 No. 14 CAN junction connectors.

    2. B0065DPC18
      *a

      Front view of wire harness connector

      (to No. 12 CAN Junction Connector)
      *b to No. 14 CAN Junction Connector
      *c to No. 2 CAN Junction Terminal

      Disconnect the U57 No. 12 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
      U57-3 (CANH) - U57-9 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 14 CAN junction connector
      U57-4 (CANH) - U57-10 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction terminal
      Result
      Result Proceed to
      OK A
      NG (Line to No. 14 CAN junction connector) B
      NG (Line to No. 2 CAN junction terminal) C

    • A

      REPLACE NO. 12 CAN JUNCTION CONNECTOR

    • B

      REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - NO. 14 CAN JUNCTION CONNECTOR)

    • CClick here
  11. Click here

    CHECK FOR OPEN IN CAN BUS LINES (NO. 2 CAN JUNCTION TERMINAL)


    1. Reconnect the U57 No. 12 CAN junction connector.

    2. Disconnect the O102 No. 2 CAN junction terminal connector.

    3. B006714C88
      *a

      Front view of wire harness connector

      (to No. 2 CAN Junction Terminal)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O102-3 (CANH) - O102-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    • OK

      REPLACE NO. 2 CAN JUNCTION TERMINAL

    • NG

      REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION TERMINAL - NO. 12 CAN JUNCTION CONNECTOR)