NAVIGATION SYSTEM Voice Guidance does not Function

WIRING DIAGRAM

B004VXHE10
*1 Navigation ECU
*2 Radio Receiver Assembly

CAUTION / NOTICE / HINT

Note

When replacing the radio receiver assembly or navigation ECU, always replace it with a new one.

If a radio receiver assembly or navigation ECU which was installed to another vehicle is used, the following may occur:


  • A communication malfunction DTC may be stored.

  • The radio receiver assembly or navigation ECU may 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 G53 radio receiver assembly connector.

    2. Disconnect the G55 navigation ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G53-22 (SI+) - G55-6 (VOI+) Always Below 1 Ω
      G53-23 (SI-) - G55-7 (VOI-) Always Below 1 Ω
      G53-22 (SI+) or G55-6 (VOI+) - Body ground Always 10 kΩ or higher
      G53-23 (SI-) or G55-7 (VOI-) - Body ground Always 10 kΩ or higher
      G55-8 (SLD1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR