AUDIO AND VISUAL SYSTEM Voice Guidance does not Function

WIRING DIAGRAM

B004CGHE02
*1 Navigation ECU
*2 Radio Receiver Assembly

CAUTION / NOTICE / HINT

Note

The following malfunctions may occur if a radio receiver assembly or navigation ECU from another vehicle is installed to this vehicle. Therefore, when replacing the radio receiver assembly or navigation ECU, be sure to replace them with new ones.


  • Communication malfunction DTC is output

  • Does not operate normally

PROCEDURE


  1. CHECK VOICE GUIDANCE SETTING


    1. Check that the voice guidance settings are not off.

      OK
      Voice guidance settings are not off.
      Result
      Proceed to
      OK
      NG

    NG

    CHANGE VOICE GUIDANCE SETTINGS TO ON

    OK

  2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU)


    1. Disconnect the P45 radio receiver assembly connector.

    2. Disconnect the P47 navigation ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P45-22 (SI+) - P47-6 (VOI+) Always Below 1 Ω
      P45-23 (SI-) - P47-7 (VOI-) Always Below 1 Ω
      P45-22 (SI+) or P47-6 (VOI+) - Body ground Always 10 kΩ or higher
      P45-23 (SI-) or P47-7 (VOI-) - Body ground Always 10 kΩ or higher
      P47-8 (SLD1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK AUDIO FUNCTION


    1. Check that sound can be heard from a front speaker.

      OK
      Sound can be heard.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NAVIGATION ECU Click here

    NG

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here