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:


  • "Display and Navigation (AVN1)" is not displayed on the CAN Bus Check screen of the GTS

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

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  • Radio receiver assembly branch line or connector

  • Power source circuit of radio receiver assembly

  • Radio receiver assembly ground circuit

  • Radio receiver assembly

WIRING DIAGRAM

A01WXA4E01
A01WY0GE01
A01WYRJE01
A01WXJIE01

CAUTION / NOTICE / HINT

Note


  • 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.

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  • 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.

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  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

  • DTC check procedure: Turn the power switch on (IG) and wait at least 30 seconds.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed.

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

Tech Tips


  • Operating the power switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      w/ Navigation System or Parking Assist Monitor System A
      w/o Parking Assist Monitor System 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. Disconnect the O57 radio receiver assembly connector.

    3. A01WXNHC01
      *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
      O57-1 (CANH) - O57-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    NG

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

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. A01WXNHC02
      *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
      O57-12 (GND1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

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

    3. A01WXNHC03
      *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O57-15 (IG) - Body ground Power switch ON (IG) 11 to 14 V
      O57-16 (ACC1) - Body ground Power switch ON (ACC) 11 to 14 V
      O57-17 (+B1) - Body ground Power switch off 11 to 14 V
      Result
      Result Result
      OK(w/ Navigation System) A
      OK(w/ Parking Assist Monitor System) B
      NG C

    A

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    B

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    C

    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. Disconnect the O70 radio receiver assembly connector.

    3. A01WXWTC30
      *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
      O70-9 (CANH) - O70-10 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    NG

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

    OK

  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. Disconnect the O68 radio receiver assembly connector.

    2. A01WY75C27
      *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
      O68-7 (GND1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

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

    4. A01WXBJC02
      *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O68-3 (ACC1) - Body ground Power switch on (ACC) 11 to 14 V
      O68-4 (+B1) - Body ground Power switch off 11 to 14 V
      O70-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Result
      Result
      OK
      NG

    OK

    REPLACE RADIO RECEIVER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)