CAN COMMUNICATION SYSTEM Audio Receiver Assembly Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Audio Receiver Assembly Communication Stop Mode

Either condition is met:

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

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

  • Radio and display receiver assembly branch line or connector

  • Power source circuit of radio and display receiver assembly

  • Radio and display receiver assembly ground circuit

  • Radio and display receiver assembly

WIRING DIAGRAM

A011WU0E01
A011WU0E02

INSPECTION PROCEDURE

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, 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.

  • 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.

  • 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), turn the blind spot monitor main switch on, wait at least 60 seconds and then drive the vehicle at a speed of 20 km/h (12 mph) or more for 11 seconds or more.

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

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 FOR OPEN IN CAN BUS LINES (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH LINE)

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

    2. Disconnect the radio and display receiver assembly connector.

      A011XVSE06

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I155-9 (CANH) - I155-10 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)
    NG

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

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

    1. Disconnect the radio and display receiver assembly connector.

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

      A011WAFE03
      Standard Resistance
      Tester Connection Condition Specified Condition

      I152-7 (GND1) - Body ground*1

      I134-20 (GND1) - Body ground*2

      		 Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

      *1: for 6 Speakers

      *2: for 10 Speakers

      Text in Illustration
      *A for 6 Speakers
      *B for 10 Speakers
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

    3. Connect 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 Switch Condition Specified Condition

      I152-3 (ACC1) - Body ground*1

      I134-11 (ACC1) - Body ground*2

      		 Power switch on (ACC) 11 to 14 V

      I152-4 (+B1) - Body ground*1

      I134-1 (+B1) - Body ground*2

      		 Always 11 to 14 V
      I155-1 (IG) - Body ground Power switch on (ACC) 11 to 14 V

      *1: for 6 Speakers

      *2: for 10 Speakers

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here