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Home >> Toyota >> 2018 >> Avalon XLE >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication System (W/ Central Gateway Ecu) - Diagnostic Codes - Circuit & Symptom Tests - (Except Hybrid) >> CAN COMMUNICATION SYSTEM (w/ Central Gateway ECU) >> Circuit Tests >> Check Bus 5 Lines for Short Circuit [10/2015 - ] >> Procedure

Check Bus 5 Lines for Short Circuit [10/2015 - ]: Procedure

  1. CONFIRM MODEL 
    1. Choose the model to be inspected.
        Proceed to
      for Models with Blind Spot Monitor System or Parking Assist Monitor System A
      for Models without Blind Spot Monitor System and Parking Assist Monitor System B

    Result: 

    B 

    See step  8

    Result: 

    A 

    See step  2

  2. CHECK FOR SHORT IN CAN BUS LINES (NO. 6 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the D131 No. 6 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY551299Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 6 CAN Junction Connector)
      *b to No. 5 CAN Junction Connector
      *c to Millimeter Wave Radar Sensor Assembly
      *d to Forward Recognition Camera
      *e to Driving Support ECU Assembly
      *f to Central Gateway ECU (CAXH and CAXL Terminal)

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      D131-1 (CANH) - D131-11 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      D131-2 (CANH) - D131-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Millimeter wave radar sensor assembly*
      D131-3 (CANH) - D131-13 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Forward recognition camera*
      D131-8 (CANH) - D131-18 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Driving support ECU assembly*
      D131-10 (CANH) - D131-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Central gateway ECU (CAXH and CAXL terminal)
      • *: w/ Toyota Safety Sense
        Proceed to
      OK A
      NG (Central gateway ECU (CAXH and CAXL terminal) main lines) B
      NG (No. 5 CAN junction connector main lines) C
      NG (ECU or sensor branch lines) D

    Result: 

    A 

    REPLACE NO. 6 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  4

    Result: 

    D 

    See step  7

    Result: 

    B 

    See step  3

  3. CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU) 
    1. Remove the central gateway ECU.

      Refer to REMOVAL [10/2015 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-9 (CAXH) - D127-24 (CAXL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      GTY560216Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Central Gateway ECU)

    Result: 

    OK 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU - NO. 6 CAN JUNCTION CONNECTOR) 

    Result: 

    NG 

    REPLACE CENTRAL GATEWAY ECU. Refer to  REMOVAL [10/2015 - ] 

  4. CHECK FOR SHORT IN CAN BUS LINES (NO. 5 CAN JUNCTION CONNECTOR) 
    1. Reconnect the D131 No. 6 CAN junction connector.
    2. Disconnect the O20 No. 5 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY551303Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 5 CAN Junction Connector)
      *b to Rear Television Camera Assembly
      *c to Central Gateway ECU (CA5H and CA5L Terminal)
      *d to Blind Spot Monitor Sensor LH
      *e to No. 6 CAN Junction Connector

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      O20-7 (CANH) - O20-17 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Rear television camera assembly*1
      O20-8 (CANH) - O20-18 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Central gateway ECU (CA5H and CA5L terminal)
      O20-9 (CANH) - O20-19 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Blind spot monitor sensor LH*2
      O20-10 (CANH) - O20-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      • *1: w/ Parking Assist Monitor System
      • *2: w/ Blind Spot Monitor System
        Proceed to
      OK A
      NG (Central gateway ECU (CA5H and CA5L terminal) main lines) B
      NG (No. 6 CAN junction connector main lines) C
      NG (ECU or sensor branch lines) D

    Result: 

    A 

    REPLACE NO. 5 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR) 

    Result: 

    D 

    See step  6

    Result: 

    B 

    See step  5

  5. CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU) 
    1. Remove the central gateway ECU.

      Refer to REMOVAL [10/2015 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-15 (CA5H) - D127-16 (CA5L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      GTY560215Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Central Gateway ECU)

    Result: 

    OK 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU - NO. 5 CAN JUNCTION CONNECTOR) 

    Result: 

    NG 

    REPLACE CENTRAL GATEWAY ECU. Refer to  REMOVAL [10/2015 - ] 

  6. CHECK FOR SHORT IN CAN BUS LINES (ECU, SENSOR) 
    1. Reconnect the O20 No. 5 CAN junction connector.
    2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.

      Refer to TERMINALS OF ECU [10/2015 - ]

    3. Measure the resistance according to the value(s) in the table below.
      GTY542021Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-15 (CA5H) - D127-16 (CA5L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      HINT: 

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.

    Result: 

    OK 

    REPLACE CORRESPONDING ECU OR SENSOR 

    Result: 

    NG 

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR 

  7. CHECK FOR SHORT IN CAN BUS LINES (ECU, SENSOR) 
    1. Reconnect the D131 No. 6 CAN junction connector.
    2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.

      Refer to TERMINALS OF ECU [10/2015 - ]

    3. Measure the resistance according to the value(s) in the table below.
      GTY542022Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-15 (CA5H) - D127-16 (CA5L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      HINT: 

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.

    Result: 

    OK 

    REPLACE CORRESPONDING ECU OR SENSOR 

    Result: 

    NG 

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR 

  8. CHECK FOR SHORT IN CAN BUS LINES (NO. 6 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the D131 No. 6 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY551301Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 6 CAN Junction Connector)
      *b to Millimeter Wave Radar Sensor Assembly
      *c to Forward Recognition Camera
      *d to Driving Support ECU Assembly
      *e to Central Gateway ECU (CA5H and CA5L Terminal)
      *f to Central Gateway ECU (CAXH and CAXL Terminal)

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      D131-2 (CANH) - D131-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Millimeter wave radar sensor assembly*
      D131-3 (CANH) - D131-13 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Forward recognition camera*
      D131-8 (CANH) - D131-18 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Driving support ECU assembly*
      D131-9 (CANH) - D131-19 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Central gateway ECU (CA5H and CA5L terminal)
      D131-10 (CANH) - D131-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Central gateway ECU (CAXH and CAXL terminal)
      • *: w/ Toyota Safety Sense
        Proceed to
      OK A
      NG (Central gateway ECU (CA5H and CA5L terminal) main lines) B
      NG (Central gateway ECU (CAXH and CAXL terminal) main lines) C
      NG (ECU or sensor branch lines) D

    Result: 

    A 

    REPLACE NO. 6 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  10

    Result: 

    D 

    See step  11

    Result: 

    B 

    See step  9

  9. CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU) 
    1. Remove the central gateway ECU.

      Refer to REMOVAL [10/2015 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-15 (CA5H) - D127-16 (CA5L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      GTY560215Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Central Gateway ECU)

    Result: 

    OK 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU - NO. 6 CAN JUNCTION CONNECTOR) 

    Result: 

    NG 

    REPLACE CENTRAL GATEWAY ECU. Refer to  REMOVAL [10/2015 - ] 

  10. CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU) 
    1. Remove the central gateway ECU.

      Refer to REMOVAL [10/2015 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-9 (CAXH) - D127-24 (CAXL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      GTY560216Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Central Gateway ECU)

    Result: 

    OK 

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU - NO. 6 CAN JUNCTION CONNECTOR) 

    Result: 

    NG 

    REPLACE CENTRAL GATEWAY ECU. Refer to  REMOVAL [10/2015 - ] 

  11. CHECK FOR SHORT IN CAN BUS LINES (ECU, SENSOR) 
    1. Reconnect the D131 No. 6 CAN junction connector.
    2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.

      Refer to TERMINALS OF ECU [10/2015 - ]

    3. Measure the resistance according to the value(s) in the table below.
      GTY542019Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-15 (CA5H) - D127-16 (CA5L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      HINT: 

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.

    Result: 

    OK 

    REPLACE CORRESPONDING ECU OR SENSOR 

    Result: 

    NG 

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR 

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