NAVIGATION SYSTEM (for DVD) Speaker Circuit

DESCRIPTION

The sound signals amplified by the stereo component amplifier assembly are sent to the speakers from the stereo component amplifier assembly via the speaker circuit.

If there is a short in this circuit, the stereo component amplifier assembly detects it and stops output to the speakers.

Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly or speakers.

If a short is detected in the speaker circuit, no sound can be heard from the speakers.

WIRING DIAGRAM

A01JAOOE01
A01J8OLE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR


    1. A01JDBNE03

      Disconnect the L120 navigation receiver assembly connector.

    2. A01JCL1E01

      Disconnect the L121 navigation receiver assembly connector.

    3. A01JD02E01

      Disconnect the L108 stereo component amplifier assembly connector.

    4. A01J8K1E09

      Disconnect the O1 and N1 front No. 1 speaker connectors.

    5. A01JD94E01

      Disconnect the I5 and I4 front No. 2 speaker connectors.

    6. A01J8K1E10

      Disconnect the Q3 and P3 rear speaker connectors.

    7. A01JB1NE01

      Disconnect the Q5 and P5 rear No. 2 speaker connectors.

    8. Measure the resistance between each of the navigation receiver assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L120-2 (FL+) - L108-1 (RL+) Always Below 1 Ω
      L120-6 (FL-) - L108-6 (RL-) Always Below 1 Ω
      L120-1 (FR+) - L108-2 (RR+) Always Below 1 Ω
      L120-5 (FR-) - L108-7 (RR-) Always Below 1 Ω
      L120-1 (FR+) - Body ground Always 10 kΩ or higher
      L120-2 (FL+) - Body ground Always 10 kΩ or higher
      L120-5 (FR-) - Body ground Always 10 kΩ or higher
      L120-6 (FL-) - Body ground Always 10 kΩ or higher

    9. Measure the resistance between each of the front No. 1 speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L108-4 (WFL+) - O1-1 Always Below 1 Ω
      L108-11 (WFL-) - O1-2 Always Below 1 Ω
      L108-3 (WFR+) - N1-1 Always Below 1 Ω
      L108-8 (WFR-) - N1-2 Always Below 1 Ω
      L108-4 (WFL+) - Body ground Always 10 kΩ or higher
      L108-11 (WFL-) - Body ground Always 10 kΩ or higher
      L108-3 (WFR+) - Body ground Always 10 kΩ or higher
      L108-8 (WFR-) - Body ground Always 10 kΩ or higher

    10. Measure the resistance between each of the front No. 2 speakers and the navigation receiver assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L120-2 (FL+) - I5-1 Always Below 1 Ω
      L120-6 (FL-) - I5-2 Always Below 1 Ω
      L120-1 (FR+) - I4-1 Always Below 1 Ω
      L120-5 (FR-) - I4-2 Always Below 1 Ω
      L120-2 (FL+) - Body ground Always 10 kΩ or higher
      L120-6 (FL-) - Body ground Always 10 kΩ or higher
      L120-1 (FR+) - Body ground Always 10 kΩ or higher
      L120-5 (FR-) - Body ground Always 10 kΩ or higher

    11. Measure the resistance between each of the rear No. 2 speakers and the navigation receiver assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L121-2 (RL+) - Q5-1 (+) Always Below 1 Ω
      L121-6 (RL-) - Q5-2 (-) Always Below 1 Ω
      L121-1 (RR+) - P5-1 (+) Always Below 1 Ω
      L121-3 (RR-) - P5-2 (-) Always Below 1 Ω
      L121-2 (RL+) - Body ground Always 10 kΩ or higher
      L121-6 (RL-) - Body ground Always 10 kΩ or higher
      L121-1 (RR+) - Body ground Always 10 kΩ or higher
      L121-3 (RR-) - Body ground Always 10 kΩ or higher

    12. Measure the resistance between each of the rear No. 2 speakers and the rear speakers to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q5-3 (+) - Q3-1 Always Below 1 Ω
      Q5-4 (-) - Q3-2 Always Below 1 Ω
      P5-3 (+) - P3-1 Always Below 1 Ω
      P5-4 (-) - P3-2 Always Below 1 Ω
      Q5-3 (+) - Body ground Always 10 kΩ or higher
      Q5-4 (-) - Body ground Always 10 kΩ or higher
      P5-3 (+) - Body ground Always 10 kΩ or higher
      P5-4 (-) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Navigation Receiver Assembly)
      *2

      Front view of wire harness connector

      (to Stereo Component Amplifier Assembly)
      *3

      Front view of wire harness connector

      (to Front No. 1 Speaker)
      *4

      Front view of wire harness connector

      (to Front No. 2 Speaker)
      *5

      Front view of wire harness connector

      (to Rear Speaker)
      *6

      Front view of wire harness connector

      (to Rear No. 2 Speaker)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT FRONT NO. 1 SPEAKER


    1. A01J9DLE38
      Text in Illustration
      *1

      Component without harness connected

      (Front No. 1 Speaker)

      Resistance check


      1. Measure the resistance between the terminals of the speaker.

        Standard Resistance
        Tester Connection Condition Specified Condition
        O1-1 - O1-2 Always 1.6 to 2.4 Ω
        N1-1 - N1-2 Always 1.6 to 2.4 Ω

        Note

        The speaker should not be removed to check resistance.


    NG

    REPLACE FRONT NO. 1 SPEAKER Click here

    OK

  3. INSPECT FRONT NO. 2 SPEAKER


    1. A01JBHCE01
      Text in Illustration
      *1

      Component without harness connected

      (Front No. 2 Speaker)

      Resistance check


      1. Measure the resistance between the terminals of the speaker.

        Standard Resistance
        Tester Connection Condition Specified Condition
        I5-1 - I5-2 Always 6.4 to 9.6 Ω
        I4-1 - I4-2 Always 6.4 to 9.6 Ω

        Note

        The speaker should not be removed to check resistance.


    NG

    REPLACE FRONT NO. 2 SPEAKER Click here

    OK

  4. INSPECT REAR SPEAKER


    1. A01J9DLE39
      Text in Illustration
      *1

      Component without harness connected

      (Rear Speaker)

      Resistance check


      1. Measure the resistance between the terminals of the speaker.

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q3-1 - Q3-2 Always 3.2 to 4.8 Ω
        P3-1 - P3-2 Always 3.2 to 4.8 Ω

        Note

        The speaker should not be removed to check resistance.


    NG

    REPLACE REAR SPEAKER Click here

    OK

  5. INSPECT REAR NO. 2 SPEAKER


    1. Check that the malfunction disappears when another speaker in good condition is installed.

      Standard
      Malfunction disappears.

      Tech Tips


      • Connect all the connectors to the rear No. 2 speakers that were disconnected.

      • If there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.

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


    NG

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

    OK

    END (REAR NO. 2 SPEAKER WAS DEFECTIVE)