LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2017 >> Avalon XLE Plus >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (W/O Central Gateway Ecu) - Diagnostic Codes & Circuit Tests - (Except Hybrid) >> CAN COMMUNICATION SYSTEM (W/O Central Gateway ECU) >> Circuit Tests >> Open in CAN Main Bus Line [10/2014 - 10/2015] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Open in CAN Main Bus Line [10/2014 - 10/2015]: Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (DLC3 BRANCH LINE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Measure the resistance according to the value (s) in the table below.
      GTY577703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 DLC3

      Standard Resistance

      Tester Connection Condition Specified Condition
      D28-6 (CANH) - D28-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      NOTE:

      When the measured value is 133 Ω or higher and a CAN communication system DTC is output, there may be a fault besides disconnection of the DLC3 branch line. For that reason, troubleshooting should be performed again from How to Proceed with Troubleshooting after repairing the trouble area (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] ).

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 

    OK 

    See step  2

  2. CHECK FOR OPEN IN CAN BUS LINES (ECM - NO. 2 CAN J/C) 
    1. Disconnect the A18 ECM connector.
      GTY577246Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to ECM)
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A18-13 (CANH) -A18-26 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

    OK 

    REPLACE ECM 

    Refer to REMOVAL [10/2014 - ] )

    NG 

    See step  3

  3. CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY - NO. 1 CAN J/C) 
    1. Reconnect the A18 ECM connector.
    2. Disconnect the D9 combination meter assembly connector.
      GTY592079Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Combination Meter Assembly)
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D9-16 (CANH) - D9-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

    OK 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [10/2014 - ] )

    NG 

    See step  4

  4. CHECK FOR OPEN IN CAN BUS LINES (NO. 1 CAN J/C) 
    1. Reconnect the D9 combination meter assembly connector.
    2. Disconnect the D72 No. 1 CAN junction connector.
    3. Disconnect the D73 No. 1 CAN junction connector.
    4. Measure the resistance according to the value (s) in the table below.
      GTY591771Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 1 CAN Junction Connector)
      *b to Combination Meter Assembly
      *c to No. 2 CAN Junction Connector

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      D72-1 (CANH) - D72-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 2 CAN junction connector
      D73-1 (CANH) - D73-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Combination meter assembly

      Wiring Color

      Code Color (CANH Side) Color (CANL Side) Connected to
      D72 B W No. 2 CAN junction connector
      D73 R W Combination meter assembly
      NOTE:
      • Before disconnecting the connectors, make a note of where they are connected.
      • Reconnect each connector to its original position.

      Result

      Result Proceed to
      OK A
      NG (Combination meter assembly main line) B
      NG (No. 2 CAN junction connector main line) C

    A 

    REPLACE NO. 1 CAN JUNCTION CONNECTOR 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 1 CAN J/C - COMBINATION METER ASSEMBLY) 

    C 

    See step  5

  5. CHECK FOR OPEN IN CAN BUS LINES (NO. 2 CAN J/C) 
    1. Reconnect the D72 No. 1 CAN Junction Connector.
    2. Reconnect the D73 No. 1 CAN Junction Connector.
    3. Disconnect the D78 No. 2 CAN Junction Connector.
    4. Disconnect the D81 No. 2 CAN Junction Connector.
    5. Measure the resistance according to the value (s) in the table below.
      GTY559184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 2 CAN Junction Connector)
      *b to No. 1 CAN Junction Connector
      *c to ECM

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      D78-1 (CANH) - D78-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 1 CAN junction connector
      D81-1 (CANH) - D81-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω ECM

      Wiring Color

      Code Color (CANH Side) Color (CANL Side) Connected to
      D78 B W No. 1 CAN junction connector
      D81 P W ECM
      NOTE:
      • Before disconnecting the connectors, make a note of where they are connected.
      • Reconnect each connector to its original position.

      Result

      Result Proceed to
      OK A
      NG (No. 1 CAN junction connector main line) B
      NG (ECM main line) C

    A 

    REPLACE NO. 2 CAN JUNCTION CONNECTOR 

    B 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 1 CAN J/C - NO. 2 CAN J/C) 

    C 

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

scientia non olet · About LEMON Manuals