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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) >> Symptom Tests >> Check Bus 5 Line for Short to +B [10/2015 - ] >> Procedure

Check Bus 5 Line for Short to +B [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  7

    Result: 

    A 

    See step  2

  2. CHECK FOR SHORT TO +B IN CAN BUS LINE (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.
      GTY591971Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *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) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher No. 5 CAN junction connector
      D131-11 (CANL) - D28-16 (BAT)
      D131-2 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Millimeter wave radar sensor assembly*
      D131-12 (CANL) - D28-16 (BAT)
      D131-3 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Forward recognition camera*
      D131-13 (CANL) - D28-16 (BAT)
      D131-8 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Driving support ECU assembly*
      D131-18 (CANL) - D28-16 (BAT)
      D131-10 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Central gateway ECU (CAXH and CAXL terminal)
      D131-20 (CANL) - D28-16 (BAT)
      • *: w/ Toyota Safety Sense
        Proceed to
      OK A
      NG (No. 5 CAN junction connector 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  5

    Result: 

    D 

    See step  6

    Result: 

    B 

    See step  3

  3. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 5 CAN JUNCTION CONNECTOR) 
    1. Disconnect the O20 No. 5 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY591967Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 5 CAN Junction Connector)      		 *b to Rear Television Camera Assembly (w/ Parking Assist Monitor System)
      *c to Central Gateway ECU (CA5H and CA5L Terminal) *d to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System)
      *e to No. 6 CAN Junction Connector - -

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      O20-7 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Rear television camera assembly*1
      O20-17 (CANL) - D28-16 (BAT)
      O20-8 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Central gateway ECU (CA5H and CA5L terminal)
      O20-18 (CANL) - D28-16 (BAT)
      O20-9 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Blind spot monitor sensor LH*2
      O20-19 (CANL) - D28-16 (BAT)
      O20-10 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher No. 6 CAN junction connector
      O20-20 (CANL) - D28-16 (BAT)
      • *1: w/ Parking Assist Monitor System
      • *2: w/ Blind Spot Monitor System
        Proceed to
      OK A
      NG (No. 6 CAN junction connector main lines) B
      NG (Central gateway ECU (CA5H and CA5L terminal) main lines) C
      NG (ECU or sensor branch lines) D

    Result: 

    A 

    REPLACE NO. 5 CAN JUNCTION CONNECTOR 

    Result: 

    B 

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

    Result: 

    D 

    See step  6

    Result: 

    C 

    See step  4

  4. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 5 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 
    1. Disconnect the D127 central gateway ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY546648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-15 (CA5H) - D127-1 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D127-16 (CA5L) - D127-1 (BATT)

    Result: 

    OK 

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

    Result: 

    NG 

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

  5. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 
    1. Disconnect the D127 central gateway ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY546640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-9 (CAXH) - D127-1 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D127-24 (CAXL) - D127-1 (BATT)

    Result: 

    OK 

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

    Result: 

    NG 

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

  6. CHECK FOR SHORT TO +B IN CAN BUS LINE (ECU, SENSOR) 
    1. Reconnect all wire harness connectors.
    2. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to +B.

      HINT: 

      If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus lines. To determine the ECU or sensor that is connected to the shorted bus line:

      Refer to TERMINALS OF ECU [10/2015 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-15 (CA5H) - D127-1 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D127-16 (CA5L) - D127-1 (BATT)
      GTY542014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU)

      HINT: 

      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.

    Result: 

    OK 

    REPLACE CORRESPONDING ECU OR SENSOR 

    Result: 

    NG 

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR 

  7. CHECK FOR SHORT TO +B IN CAN BUS LINE (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.
      GTY591966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *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) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Millimeter wave radar sensor assembly*
      D131-12 (CANL) - D28-16 (BAT)
      D131-3 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Forward recognition camera*
      D131-13 (CANL) - D28-16 (BAT)
      D131-8 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Driving support ECU assembly*
      D131-18 (CANL) - D28-16 (BAT)
      D131-9 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Central gateway ECU (CA5H and CA5L terminal)
      D131-19 (CANL) - D28-16 (BAT)
      D131-10 (CANH) - D28-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Central gateway ECU (CAXH and CAXL terminal)
      D131-20 (CANL) - D28-16 (BAT)
      • *: 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  9

    Result: 

    D 

    See step  10

    Result: 

    B 

    See step  8

  8. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 
    1. Disconnect the D127 central gateway ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY546641Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-15 (CA5H) - D127-1 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D127-16 (CA5L) - D127-1 (BATT)

    Result: 

    OK 

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

    Result: 

    NG 

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

  9. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 
    1. Disconnect the D127 central gateway ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY599292Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU)

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-9 (CAXH) - D127-1 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D127-24 (CAXL) - D127-1 (BATT)

    Result: 

    OK 

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

    Result: 

    NG 

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

  10. CHECK FOR SHORT TO +B IN CAN BUS LINE (ECU, SENSOR) 
    1. Reconnect all wire harness connectors.
    2. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to +B.

      HINT: 

      If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus lines. To determine the ECU or sensor that is connected to the shorted bus line:

      Refer to TERMINALS OF ECU [10/2015 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      D127-15 (CA5H) - D127-1 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      D127-16 (CA5L) - D127-1 (BATT)
      GTY542015Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU)

      HINT: 

      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.

    Result: 

    OK 

    REPLACE CORRESPONDING ECU OR SENSOR 

    Result: 

    NG 

    REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR 

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