NAVIGATION SYSTEM Speaker Circuit

DESCRIPTION

If there is a short in a speaker circuit, the stereo component amplifier assembly detects the short 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.

WIRING DIAGRAM

A0161L1E03
A0161WTE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR


    1. Disconnect the P48 stereo component amplifier assembly connector.

    2. Disconnect the L5 and M12 front No. 2 speaker assembly connectors.

    3. Disconnect the L2 and M4 front No. 3 speaker assembly connectors.

    4. Disconnect the L1 and M13 front No. 1 speaker assembly connectors.

    5. Disconnect the K3 front stereo component speaker assembly connector.

    6. Disconnect the N2 and O2 rear speaker assembly connectors.

    7. Disconnect the N5 and O5 rear No. 2 speaker assembly connectors.

    8. Disconnect the Q26 and Q22 rear stereo component speaker assembly connectors.

    9. Disconnect the P21 stereo component speaker assembly connector.

    10. Measure the resistance between each of the front No. 3 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P48-13 (FR+) - L2-1 (TWR+) Always Below 1 Ω
      P48-28 (FR-) - L2-3 (TWR-) Always Below 1 Ω
      P48-12 (FL+) - M4-1 (TWL+) Always Below 1 Ω
      P48-27 (FL-) - M4-3 (TWL-) Always Below 1 Ω

    11. Measure the resistance between each of the front No. 2 speaker assemblies and the front No. 3 speaker assemblies to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L2-2 (+) - L5-1 Always Below 1 Ω
      L2-4 (-) - L5-2 Always Below 1 Ω
      M4-2 (+) - M12-1 Always Below 1 Ω
      M4-4 (-) - M12-2 Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      P48-5 (WFR+) - L1-1 Always Below 1 Ω
      P48-20 (WFR-) - L1-2 Always Below 1 Ω
      P48-4 (WFL+) - M13-1 Always Below 1 Ω
      P48-19 (WFL-) - M13-2 Always Below 1 Ω

    13. Measure the resistance between the front stereo component speaker assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P48-7 (CTR+) - K3-1 Always Below 1 Ω
      P48-22 (CTR-) - K3-2 Always Below 1 Ω

    14. Measure the resistance between each of the rear No. 2 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P48-15 (RR+) - N5-1 (+) Always Below 1 Ω
      P48-30 (RR-) - N5-3 (-) Always Below 1 Ω
      P48-14 (RL+) - O5-1 (+) Always Below 1 Ω
      P48-29 (RL-) - O5-3 (-) Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N5-2 (+TW) - N2-1 Always Below 1 Ω
      N5-4 (-TW) - N2-2 Always Below 1 Ω
      O5-2 (+TW) - O2-1 Always Below 1 Ω
      O5-4 (-TW) - O2-2 Always Below 1 Ω

    16. Measure the resistance between each of the rear stereo component speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P48-11 (SR+) - Q26-1 Always Below 1 Ω
      P48-26 (SR-) - Q26-2 Always Below 1 Ω
      P48-10 (SL+) - Q22-1 Always Below 1 Ω
      P48-25 (SL-) - Q22-2 Always Below 1 Ω

    17. Measure the resistance between the stereo component speaker assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P48-6 (WF1+) - P21-3 (WF1+) Always Below 1 Ω
      P48-21 (WF1-) - P21-4 (WF1-) Always Below 1 Ω

    18. Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      P48-13 (FR+) - Body ground Always 10 kΩ or higher
      P48-28 (FR-) - Body ground Always 10 kΩ or higher
      P48-12 (FL+) - Body ground Always 10 kΩ or higher
      P48-27 (FL-) - Body ground Always 10 kΩ or higher
      P48-5 (WFR+) - Body ground Always 10 kΩ or higher
      P48-20 (WFR-) - Body ground Always 10 kΩ or higher
      P48-4 (WFL+) - Body ground Always 10 kΩ or higher
      P48-19 (WFL-) - Body ground Always 10 kΩ or higher
      P48-7 (CTR+) - Body ground Always 10 kΩ or higher
      P48-22 (CTR-) - Body ground Always 10 kΩ or higher
      P48-15 (RR+) - Body ground Always 10 kΩ or higher
      P48-30 (RR-) - Body ground Always 10 kΩ or higher
      P48-14 (RL+) - Body ground Always 10 kΩ or higher
      P48-29 (RL-) - Body ground Always 10 kΩ or higher
      P48-11 (SR+) - Body ground Always 10 kΩ or higher
      P48-26 (SR-) - Body ground Always 10 kΩ or higher
      P48-10 (SL+) - Body ground Always 10 kΩ or higher
      P48-25 (SL-) - Body ground Always 10 kΩ or higher
      P48-6 (WF1+) - Body ground Always 10 kΩ or higher
      P48-21 (WF1-) - Body ground Always 10 kΩ or higher

    19. Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L5-1 - Body ground Always 10 kΩ or higher
      L5-2 - Body ground Always 10 kΩ or higher
      M12-1 - Body ground Always 10 kΩ or higher
      M12-2 - Body ground Always 10 kΩ or higher

    20. Measure the resistance between each of the rear speaker assemblies and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      N2-1 - Body ground Always 10 kΩ or higher
      N2-2 - Body ground Always 10 kΩ or higher
      O2-1 - Body ground Always 10 kΩ or higher
      O2-2 - 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.

    2. A016021E07
      Text in Illustration
      *a

      Component without harness connected

      (Front No. 1 Speaker Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4.8 to 7.2 Ω

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  3. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


    1. Remove the front No. 2 speaker assembly.

    2. A0161JPE24
      Text in Illustration
      *a

      Component without harness connected

      (Front No. 2 Speaker Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 10 kΩ or higher

    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

    OK

  4. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY


    1. Check that the malfunction disappears when a known good speaker is installed Click here.

      OK
      Malfunction disappears.

      Tech Tips


      • Connect all the connectors to the front No. 2 speakers 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.


    NG

    INSPECT FRONT NO. 3 SPEAKER ASSEMBLY Click here

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

  5. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY


    1. Remove the front No. 3 speaker assembly.

    2. A01610CE74
      Text in Illustration
      *A for RH
      *B for LH
      *a

      Component without harness connected

      (Front No. 3 Speaker Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (TWR+) - 3 (TWR-) Always 4.8 to 6.4 Ω
      1 (TWR+) - 2 (+) Always Below 1 Ω
      3 (TWR-) - 4 (-) Always Below 1 Ω
      1 (TWL+) - 3 (TWL-) Always 4.8 to 6.4 Ω
      1 (TWL+) - 2 (+) Always Below 1 Ω
      3 (TWL-) - 4 (-) Always Below 1 Ω

    NG

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY Click here

    OK

  6. INSPECT FRONT STEREO COMPONENT SPEAKER ASSEMBLY


    1. Remove the front stereo component speaker assembly.

    2. A0162B1E27
      Text in Illustration
      *a

      Component without harness connected

      (Front Stereo Component Speaker Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4.8 to 6.4 Ω

    NG

    REPLACE FRONT STEREO COMPONENT SPEAKER ASSEMBLY Click here

    OK

  7. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly.

    2. A016021E07
      Text in Illustration
      *a

      Component without harness connected

      (Rear Speaker Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 5.0 to 7.0 Ω

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

  8. INSPECT REAR NO. 2 SPEAKER ASSEMBLY


    1. Remove the rear No. 2 speaker assembly.

    2. A01610CE75
      Text in Illustration
      *a

      Component without harness connected

      (Rear No. 2 Speaker Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (+) - 3 (-) Always 10 kΩ or higher
      1 (+) - 2 (+TW) Always Below 1 Ω
      3 (-) - 4 (-TW) Always Below 1 Ω

    NG

    REPLACE REAR NO. 2 SPEAKER ASSEMBLY Click here

    OK

  9. REPLACE REAR NO. 2 SPEAKER ASSEMBLY


    1. Check that the malfunction disappears when a known good speaker is installed Click here.

      OK
      Malfunction disappears.

      Tech Tips


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

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

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


    NG

    INSPECT REAR STEREO COMPONENT SPEAKER ASSEMBLY Click here

    OK

    END (REAR NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

  10. INSPECT REAR STEREO COMPONENT SPEAKER ASSEMBLY


    1. Remove the rear stereo component speaker assembly.

    2. A0162B1E27
      Text in Illustration
      *a

      Component without harness connected

      (Rear Stereo Component Speaker Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4.8 to 6.4 Ω

    NG

    REPLACE REAR STEREO COMPONENT SPEAKER ASSEMBLY Click here

    OK

  11. INSPECT STEREO COMPONENT SPEAKER ASSEMBLY


    1. Remove the stereo component speaker assembly.

    2. A01610CE77
      Text in Illustration
      *a

      Component without harness connected

      (Stereo Component Speaker Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (WF1+) - 4 (WF1-) Always 6.2 to 7.8 Ω

    NG

    REPLACE STEREO COMPONENT SPEAKER ASSEMBLY Click here

    OK

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