CAN COMMUNICATION SYSTEM Audio Receiver Assembly Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Audio Receiver Assembly Communication Stop Mode

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

  • Applies to Audio Receiver Assembly Communication Stop Mode in DTC Combination Table.

  • Radio and display receiver assembly branch wire or connector

  • Power source circuit of radio and display receiver assembly

  • Radio and display receiver assembly

WIRING DIAGRAM

A0043DXE01
A0042DWE01

INSPECTION PROCEDURE

Note


  • Turn the power switch off before measuring the resistances between CAN main bus wires and between CAN main bus branch wires.

  • Turn the power switch off before inspecting CAN bus wires for a ground short.

  • After the power switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.

  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the power switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

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 WIRES (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH WIRE)


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

    2. A0043XVE47
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

      Disconnect the L107 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
      L107-9 (CANH) - L107-10 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

    NG

    REPAIR OR REPLACE CAN MAIN BUS BRANCH WIRE OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY)

    OK

  2. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. Disconnect the L109 radio and display receiver assembly connector.

    2. A0043FNE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L109-7 (GND1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND TERMINAL)

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


    1. A00435AE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L109-4 (+B1) - Body ground Power switch off 11 to 14 V
      L109-3 (ACC1) - Body ground Power switch on (ACC) 11 to 14 V
      L107-1 (IG) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here