NAVIGATION SYSTEM Speaker Circuit

DESCRIPTION

The radio and display receiver assembly sends sound signals to the speakers.

WIRING DIAGRAM

A002OKJE21

CAUTION / NOTICE / HINT

Note

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for RH Side

    • *2: for LH Side


    1. Disconnect the H107 and H108 radio and display receiver assembly connectors.

    2. Disconnect the J12*1 and K12*2 front No. 1 speaker assembly connectors.

    3. Disconnect the H41*1 and H42*2 front No. 2 speaker assembly connectors.

    4. Disconnect the L5*1 and M5*2 rear speaker assembly connectors.

    5. Measure the resistance between each of the radio and display receiver assembly and the front No. 2 speaker assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H107-1 (FR+) - H41-4 (+) Always Below 1 Ω
      H107-5 (FR-) - H41-2 (-) Always Below 1 Ω
      H107-2 (FL+) - H42-4 (+) Always Below 1 Ω
      H107-6 (FL-) - H42-2 (-) Always Below 1 Ω

    6. Measure the resistance between each of the front No. 2 speaker assembly and front No. 1 speaker assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H41-3 (TWR+) - J12-1 Always Below 1 Ω
      H41-1 (TWR-) - J12-2 Always Below 1 Ω
      H42-3 (TWL+) - K12-1 Always Below 1 Ω
      H42-1 (TWL-) - K12-2 Always Below 1 Ω

    7. Measure the resistance between each of the radio and display receiver assembly and the rear speaker assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H108-1 (RR+) - L5-1 Always Below 1 Ω
      H108-3 (RR-) - L5-2 Always Below 1 Ω
      H108-2 (RL+) - M5-1 Always Below 1 Ω
      H108-6 (RL-) - M5-2 Always Below 1 Ω

    8. Measure the resistance between each speaker assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      J12-1 - Body ground Always 10 kΩ or higher
      J12-2 - Body ground Always 10 kΩ or higher
      K12-1 - Body ground Always 10 kΩ or higher
      K12-2 - Body ground Always 10 kΩ or higher
      H41-4 (+) - Body ground Always 10 kΩ or higher
      H41-2 (-) - Body ground Always 10 kΩ or higher
      H42-4 (+) - Body ground Always 10 kΩ or higher
      H42-2 (-) - Body ground Always 10 kΩ or higher
      L5-1 - Body ground Always 10 kΩ or higher
      L5-2 - Body ground Always 10 kΩ or higher
      M5-1 - Body ground Always 10 kΩ or higher
      M5-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Remove the front No. 1 speaker assembly Click here.

    2. Inspect the front No. 1 speaker assembly Click here.


    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  3. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly Click here.

    2. Inspect the rear speaker assembly Click here.


    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

  4. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


    1. Replace the front No. 2 speaker assembly with a known good one Click here.

    2. Check that the malfunction disappears.

      Note


      • Connect all the connectors that were disconnected to the front No. 2 speaker assemblies.

      • Perform the above inspection on both LH and RH sides.

      OK
      Malfunction disappears.

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here