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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (Except HV) - Circuit Tests (2 Of 8) >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> Radio Receiver Assembly Communication Stop Mode [12/2019 - 10/2022] >> Procedure

Radio Receiver Assembly Communication Stop Mode [12/2019 - 10/2022]: Procedure

  1. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      for 8 inch Display A
      for 12.3 inch Display B

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  2

  2. CHECK FOR OPEN IN CAN BUS LINES (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH LINE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the H2 radio and display receiver assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H2-13 (CANH) - H2-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      GTY917725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly)

      Result

      Result 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY) 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) 
    1. Disconnect the H1 radio and display receiver assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H1-1 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
      GTY911142Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly)

      Result

      Result
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) 

    Result: 

    OK 

    See step  4

  4. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Stop and Start System A
      w/o Stop and Start System B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Reconnect the cable to the negative (-) battery terminal.
    2. Measure the voltage according to the value(s) in the table below.
      GTY871210Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly)      		 - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      H2-19 (IG) - Body ground Ignition switch ON 11 to 14 V
      H1-4 (+B1) - Body ground Always 11 to 14 V
      H1-15 (ACC1) - Body ground Ignition switch ACC 11 to 14 V

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [12/2019 - 10/2022]

    Result: 

    NG 

    GO TO STOP AND START SYSTEM (FOR BACKUP BOOST CONVERTER CIRCUIT) 

    Refer to Backup Boost Converter Circuit [12/2019 - 10/2022]

  6. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Reconnect the cable to the negative (-) battery terminal.
    2. Measure the voltage according to the value(s) in the table below.
      GTY871210Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Radio and Display Receiver Assembly)      		 - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      H2-19 (IG) - Body ground Ignition switch ON 11 to 14 V
      H1-4 (+B1) - Body ground Always 11 to 14 V
      H1-15 (ACC1) - Body ground Ignition switch ACC 11 to 14 V

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [12/2019 - 10/2022]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

  7. CHECK FOR OPEN IN CAN BUS LINES (RADIO RECEIVER ASSEMBLY BRANCH LINE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the H5 radio receiver assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY917726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Radio Receiver Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      H5-13 (CANH) - H5-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Result

      Result 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (RADIO RECEIVER ASSEMBLY) 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) 
    1. Disconnect the H4 radio receiver assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H4-1 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
      GTY942269Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Radio Receiver Assembly)

      Result

      Result
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS CONNECTOR (GROUND CIRCUIT) 

    Result: 

    OK 

    See step  9

  9. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Stop and Start System A
      w/o Stop and Start System B

    Result: 

    B 

    See step  11

    Result: 

    A 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Reconnect the cable to the negative (-) battery terminal.
    2. Measure the voltage according to the value(s) in the table below.
      GTY871208Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Radio Receiver Assembly)      		 - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      H5-19 (IG) - Body ground Ignition switch ON 11 to 14 V
      H4-4 (+B1) - Body ground Always 11 to 14 V
      H4-15 (ACC1) - Body ground Ignition switch ACC 11 to 14 V

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO RECEIVER ASSEMBLY 

    Refer to REMOVAL [12/2019 - 10/2022]

    Result: 

    NG 

    GO TO STOP AND START SYSTEM (FOR BACKUP BOOST CONVERTER CIRCUIT) 

    Refer to Backup Boost Converter Circuit [12/2019 - 10/2022]

  11. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Reconnect the cable to the negative (-) battery terminal.
    2. Measure the voltage according to the value(s) in the table below.
      GTY871208Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Radio Receiver Assembly)      		 - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      H5-19 (IG) - Body ground Ignition switch ON 11 to 14 V
      H4-4 (+B1) - Body ground Always 11 to 14 V
      H4-15 (ACC1) - Body ground Ignition switch ACC 11 to 14 V

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE RADIO RECEIVER ASSEMBLY 

    Refer to REMOVAL [12/2019 - 10/2022]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

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