CAN COMMUNICATION SYSTEM Radio Receiver Assembly Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Radio Receiver Assembly Communication Stop Mode

Either condition is met:


  • Communication stop for "Display and Navigation (AVN)" is indicated on the "Communication Bus Check" screen of the GTS.

  • Communication system DTCs (DTCs that start with U) that correspond to "Radio Receiver Assembly Communication Stop Mode" in "DTC Combination Table" are output.

  • Radio receiver assembly branch line or connector

  • Power source circuit of radio receiver assembly

  • Radio receiver assembly*1*2

*1: for Navigation Receiver Type

*2: for Radio and Display Type

WIRING DIAGRAM

B001MYLE16
B001N45E38

CAUTION / NOTICE / HINT

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.

    Click here

  • Before measuring the resistance of the CAN bus, turn the power 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 (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Click here

  • 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.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips


  • 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.

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for navigation receiver type A
      for radio and display type B

    B

    CHECK FOR OPEN IN CAN BUS LINES (RADIO RECEIVER ASSEMBLY BRANCH LINE) Click here

    A

  2. CHECK FOR OPEN IN CAN BUS LINES (RADIO RECEIVER ASSEMBLY BRANCH LINE)


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

    2. B001MPZE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      Disconnect the H147 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H147-1 (CANH) - H147-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

    NG

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

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. B001M9EE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H147-12 (GND1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

    2. Reconnect the cable to the negative (-) auxiliary battery terminal.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H147-15 (IG) - Body ground Power switch on (IG) 11 to 14 V
      H147-16 (ACC1) - Body ground Power switch on (ACC) 11 to 14 V
      H147-17 (+B1) - Body ground Power switch off 11 to 14 V

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

  4. CHECK FOR OPEN IN CAN BUS LINES (RADIO RECEIVER ASSEMBLY BRANCH LINE)


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

    2. B001LD7E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      Disconnect the H164 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H164-9 (CANH) - H164-10 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

    NG

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

    OK

  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. Disconnect the H162 radio receiver assembly connector.

    2. B001L5SE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H162-7 (GND1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

    3. Reconnect the cable to the negative (-) auxiliary battery terminal.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H162-3 (ACC1) - Body ground Power switch on (ACC) 11 to 14 V
      H162-4 (+B1) - Body ground Power switch off 11 to 14 V
      H164-1 (IG) - Body ground Power switch on (IG) 11 to 14 V

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)