NAVIGATION SYSTEM(for SD) Speaker Circuit

DESCRIPTION

The sound signals amplified by the navigation receiver assembly are sent to the speakers from the navigation receiver assembly via the speaker circuit.

If there is a short in a speaker circuit, the navigation receiver 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 navigation receiver assembly or speakers.

WIRING DIAGRAM

A01QP6XE03
A01QP1DE03
*a Rear Speaker Assembly RH
*b Rear Speaker Assembly LH
*c Woofer Box Speaker Assembly
*d Stereo Component Amplifier Assembly

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 LH Side

    • *2: for RH Side


    1. Disconnect the M33 stereo component amplifier assembly connector.

    2. Disconnect the J1*1 and/or I1*2 front No. 1 speaker assembly connector.

    3. Disconnect the H2*1 and/or H4*2 front No. 2 speaker assembly connector.

    4. Disconnect the L2*1 and/or K2*2 rear speaker assembly connector.

    5. Disconnect the N33 Woofer box speaker assembly connector.

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition
      M33-14 (FL+) - J1-1 Always Below 1 Ω
      M33-29 (FL-) - J1-2 Always Below 1 Ω
      M33-10 (TWL+) - H2-4(TWL+) Always Below 1 Ω
      M33-25 (TWL-) - H2-3(TWL-) Always Below 1 Ω
      M33-11 (RL+) - L2-1 Always Below 1 Ω
      M33-26 (RL-) - L2-2 Always Below 1 Ω
      M33-14 (FL+) - Body ground Always 10 kΩ or higher
      M33-29 (FL-) - Body ground Always 10 kΩ or higher
      M33-10 (TWL+) - Body ground Always 10 kΩ or higher
      M33-25 (TWL-) - Body ground Always 10 kΩ or higher
      M33-11 (RL+) - Body ground Always 10 kΩ or higher
      M33-26 (RL-) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      M33-9 (FR+) - I1-1 Always Below 1 Ω
      M33-24 (FR-) - I1-2 Always Below 1 Ω
      M33-13 (TWR+) - H4-4(TWR+) Always Below 1 Ω
      M33-28 (TWR-) - H4-3(TWR-) Always Below 1 Ω
      M33-12 (RR+) - K2-1 Always Below 1 Ω
      M33-27 (RR-) - K2-2 Always Below 1 Ω
      M33-9 (FR+) - Body ground Always 10 kΩ or higher
      M33-24 (FR-) - Body ground Always 10 kΩ or higher
      M33-13 (TWR+) - Body ground Always 10 kΩ or higher
      M33-28 (TWR-) - Body ground Always 10 kΩ or higher
      M33-12 (RR+) - Body ground Always 10 kΩ or higher
      M33-27 (RR-) - Body ground Always 10 kΩ or higher
      for Woofer Box Speaker
      Tester Connection Condition Specified Condition
      M33-15 (WFR+) - N33-4 (WF+) Always Below 1 Ω
      M33-30 (WFR-) - N33-1 (WF-) Always Below 1 Ω
      M33-8 (WFL+) - N33-3 (WF+) Always Below 1 Ω
      M33-23 (WFL-) - N33-2 (WF-) Always Below 1 Ω
      M33-15 (WFR+) - Body ground Always 10 kΩ or higher
      M33-30 (WFR-) - Body ground Always 10 kΩ or higher
      M33-8 (WFL+) - Body ground Always 10 kΩ or higher
      M33-23 (WFL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Remove the front No. 1 speaker assembly connector.

      Click here

    2. Inspect the front No. 1 speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  3. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


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

      Click here

    2. Check the malfunction disappears.

      Tech Tips


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

      • When 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.

      OK
      Malfunction disappears.
      Result
      Proceed to
      OK
      NG

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

  4. CHECK REAR SPEAKER ASSEMBLY


    1. Replace the rear speaker assembly with a known good one.

      Click here

    2. Check the malfunction disappears.

      Tech Tips


      • Connect all the connectors to the rear speaker assemblies that were disconnected.

      • When 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.

      OK
      Malfunction disappears.
      Result
      Proceed to
      OK
      NG

    OK

    END (REAR SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

  5. INSPECT WOOFER BOX SPEAKER ASSEMBLY


    1. Remove the woofer box speaker assembly.

      Click here

    2. Inspect the woofer box speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE WOOFER BOX SPEAKER ASSEMBLY Click here

    OK

  6. CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY


    1. Replace the stereo component amplifier assembly with a known good one.

      Click here

    2. Check the malfunction disappears.

      OK
      Malfunction disappears.
      Result
      Proceed to
      OK
      NG

    OK

    END (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here