NAVIGATION SYSTEM(for Navigation Receiver Type) Speaker Circuit

DESCRIPTION

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


  1. A002BQRE02

PROCEDURE


  1. CHECK SPEAKER (OPERATION CHECK)


    1. A0028M8

      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 or front No. 2 speaker assembly A
      Rear speaker assembly B

      Tech Tips

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


    B

    CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY)


    1. Disconnect the F114 navigation receiver assembly connector.

    2. Disconnect the G1 and G5 front No. 2 speaker assembly connectors.

    3. Disconnect the H3 and I3 front No. 1 speaker assembly connectors.

    4. Measure the resistance between the navigation receiver 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
      F114-1 (FR+) - G1-4 (+) Always Below 1 Ω
      F114-5 (FR-) - G1-2 (-) Always Below 1 Ω
      F114-2 (FL+) - G5-4 (+) Always Below 1 Ω
      F114-6 (FL-) - G5-2 (-) Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G1-3 (+) - H3-1 Always Below 1 Ω
      G1-1 (-) - H3-2 Always Below 1 Ω
      G5-3 (+) - I3-1 Always Below 1 Ω
      G5-1 (-) - I3-2 Always Below 1 Ω

    6. Measure the resistance between the navigation receiver assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F114-1 (FR+) - Body ground Always 10 kΩ or higher
      F114-5 (FR-) - Body ground Always 10 kΩ or higher
      F114-2 (FL+) - Body ground Always 10 kΩ or higher
      F114-6 (FL-) - Body ground Always 10 kΩ or higher

    7. 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
      G1-3 (+) - Body ground Always 10 kΩ or higher
      G1-1 (-) - Body ground Always 10 kΩ or higher
      G5-3 (+) - Body ground Always 10 kΩ or higher
      G5-1 (-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


    1. Remove the front No. 2 speaker assembly.

      Click here

    2. A0027XVC34
      *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 (+) - 2 (-) Always 10 kΩ or higher
      3 (+) - 4 (+) Always Below 1 Ω
      1 (-) - 2 (-) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    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 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.

      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

  5. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Remove the front No. 1 speaker assembly.

      Click here

    2. A002CKTC68
      *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 3.2 to 4.8 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

  6. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY)


    1. Disconnect the F115 navigation receiver assembly connector.

    2. Disconnect the J4 and K4 rear speaker assembly connectors.

    3. Measure the resistance between the navigation receiver assembly and each of the rear speaker assemblies to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F115-1 (RR+) - J4-1 Always Below 1 Ω
      F115-3 (RR-) - J4-2 Always Below 1 Ω
      F115-2 (RL+) - K4-1 Always Below 1 Ω
      F115-6 (RL-) - K4-2 Always Below 1 Ω

    4. Measure the resistance between the navigation receiver assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F115-1 (RR+) - Body ground Always 10 kΩ or higher
      F115-3 (RR-) - Body ground Always 10 kΩ or higher
      F115-2 (RL+) - Body ground Always 10 kΩ or higher
      F115-6 (RL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly.

      Click here

    2. A002CKTC68
      *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 3.2 to 4.8 Ω
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here