NAVIGATION SYSTEM (for Radio and Display Type) Speaker Circuit

DESCRIPTION

If there is a short in a speaker 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.

WIRING DIAGRAM

A01EX2LE01
A01EZ1WE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK SPEAKER (OPERATION CHECK)


    1. A01EXQJ

      Enter the "System Check Mode" screen.

      Refer to Check Speaker in Operation Check Click here.

    2. Perform the operation check above and determine the speaker that is not operating.

      Result
      Not Operating Speaker Proceed to
      Front No. 1 speaker assembly A
      Front No. 3 speaker assembly B
      Front No. 2 speaker assembly C
      Rear No. 2 speaker assembly D
      Rear speaker assembly E

      Tech Tips

      If sound cannot be heard from any speaker, inspect all of them.


    B

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY) Click here

    C

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY) Click here

    D

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY) Click here

    E

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR SPEAKER ASSEMBLY) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY)


    1. Disconnect the I68 stereo component amplifier assembly connector.

    2. Disconnect the J5 and K5 front No. 1 speaker assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I68-15 (FR+) - J5-1 (+) Always Below 1 Ω
      I68-30 (FR-) - J5-2 (-) Always Below 1 Ω
      I68-11 (FL+) - K5-1 (+) Always Below 1 Ω
      I68-26 (FL-) - K5-2 (-) Always Below 1 Ω

    4. 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
      I68-15 (FR+) - Body ground Always 10 kΩ or higher
      I68-30 (FR-) - Body ground Always 10 kΩ or higher
      I68-11 (FL+) - Body ground Always 10 kΩ or higher
      I68-26 (FL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


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

    2. A01EVZAE04
      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 4.6 to 6.6 Ω

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

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

  4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY)


    1. Disconnect the I68 stereo component amplifier assembly connector.

    2. Disconnect the I60 front No. 3 speaker assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I68-13 (CTR+) - I60-2 Always Below 1 Ω
      I68-28 (CTR-) - I60-1 Always Below 1 Ω

    4. 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
      I68-13 (CTR+) - Body ground Always 10 kΩ or higher
      I68-28 (CTR-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY


    1. Remove the front No. 3 speaker assembly Click here.

    2. A01EWN9E34
      Text in Illustration
      *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 - 2 Always 6.8 to 10.2 Ω

    NG

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY Click here

    OK

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

  6. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY)


    1. Disconnect the I68 stereo component amplifier assembly connector.

    2. Disconnect the I84 and I2 front No. 2 speaker assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I68-12 (TWR+) - I84-4 Always Below 1 Ω
      I68-27 (TWR-) - I84-3 Always Below 1 Ω
      I68-14 (TWL+) - I2-4 Always Below 1 Ω
      I68-29 (TWL-) - I2-3 Always Below 1 Ω

    4. 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
      I68-12 (TWR+) - Body ground Always 10 kΩ or higher
      I68-27 (TWR-) - Body ground Always 10 kΩ or higher
      I68-14 (TWL+) - Body ground Always 10 kΩ or higher
      I68-29 (TWL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


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

    2. A01EVOFE50
      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
      4 - 3 Always 3.4 to 5.2 Ω

    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

    OK

  8. 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 speaker assemblies that were disconnected.

      • When there is a possibility that either the right or left front No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.

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


    NG

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

    OK

    END

  9. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY)


    1. Disconnect the I68 stereo component amplifier assembly connector.

    2. Disconnect the O19 and O20 rear No. 2 speaker assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I68-10 (SR+) - O19-2 Always Below 1 Ω
      I68-25 (SR-) - O19-1 Always Below 1 Ω
      I68-9 (SL+) - O20-2 Always Below 1 Ω
      I68-24 (SL-) - O20-1 Always Below 1 Ω

    4. 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
      I68-10 (SR+) - Body ground Always 10 kΩ or higher
      I68-25 (SR-) - Body ground Always 10 kΩ or higher
      I68-9 (SL+) - Body ground Always 10 kΩ or higher
      I68-24 (SL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. INSPECT REAR NO. 2 SPEAKER ASSEMBLY


    1. Remove the rear No. 2 speaker assembly Click here.

    2. A01EWN9E35
      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 - 2 Always 6.8 to 10.2 Ω

    NG

    REPLACE REAR NO. 2 SPEAKER ASSEMBLY Click here

    OK

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

  11. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR SPEAKER ASSEMBLY)


    1. Disconnect the I68 stereo component amplifier assembly connector.

    2. Disconnect the O22 rear speaker assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I68-8 (WF1+) - O22-1 Always Below 1 Ω
      I68-23 (WF1-) - O22-2 Always Below 1 Ω

    4. 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
      I68-8 (WF1+) - Body ground Always 10 kΩ or higher
      I68-23 (WF1-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly Click here.

    2. A01ETX9E06
      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 4.8 to 6.8 Ω

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

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