CAN COMMUNICATION SYSTEM Audio Receiver Assembly Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Audio Receiver Assembly Communication Stop Mode

  • "AVN1" is not displayed on the "Communication Bus Check" screen of the intelligent tester

  • 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

A01J8L6E03
A01JD3JE02

INSPECTION PROCEDURE

Note


  • Turn the power switch off before measuring the resistances between CAN bus main wires and between CAN 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 CAN BUS WIRE FOR DISCONNECTION (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH WIRE)


    1. Turn the power switch off.

    2. A01JBW2E20
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Radio and Display Receiver Assembly)

      Disconnect the radio and display receiver assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      L149-9 (CANH) - L149-10 (CANL) Power switch off 54 to 69 Ω

    NG

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

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)


    1. A01JD17E18
      Text in Illustration
      *1

      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
      L146-4 (+B1) - Body ground Always 11 to 14 V
      L146-3 (ACC1) - Body ground Power switch on (ACC) 11 to 14 V
      L149-1 (IG) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)


    1. A01J9RME87
      Text in Illustration
      *1

      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
      L146-7 (GND1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND TERMINAL)

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here