NAVIGATION SYSTEM 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

B0025F2E01
B0028F6E03

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 VEHICLE CONDITION


    1. Check the vehicle condition.

      Result
      Result Proceed to
      for 6 Speakers A
      for 4 Speakers B

    B

    CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for LH Side

    • *2: for RH Side


    1. Disconnect the G115 and G116 navigation receiver assembly connectors.

    2. Disconnect the K4*1 and/or J4*2 front No. 1 speaker assembly connector.

    3. Disconnect the K7*1 and/or J7*2 front No. 2 speaker assembly connector.

    4. Disconnect the M2*1 and/or L2*2 rear speaker assembly connector.

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition
      G115-2 (FL+) - K7-4 (TWL+) Always Below 1 Ω
      G115-6 (FL-) - K7-2 (TWL-) Always Below 1 Ω
      K7-3 (+) - K4-1 Always Below 1 Ω
      K7-1 (-) - K4-2 Always Below 1 Ω
      G116-2 (RL+) - M2-1 Always Below 1 Ω
      G116-6 (RL-) - M2-2 Always Below 1 Ω
      G115-2 (FL+) - Body ground Always 10 kΩ or higher
      G115-6 (FL-) - Body ground Always 10 kΩ or higher
      G116-2 (RL+) - Body ground Always 10 kΩ or higher
      G116-6 (RL-) - Body ground Always 10 kΩ or higher
      K7-3 (+) - Body ground Always 10 kΩ or higher
      K7-1 (-) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      G115-1 (FR+) - J7-4 (TWR+) Always Below 1 Ω
      G115-5 (FR-) - J7-2 (TWR-) Always Below 1 Ω
      J7-3 (+) - J4-1 Always Below 1 Ω
      J7-1 (-) - J4-2 Always Below 1 Ω
      G116-1 (RR+) - L2-1 Always Below 1 Ω
      G116-3 (RR-) - L2-2 Always Below 1 Ω
      G115-1 (FR+) - Body ground Always 10 kΩ or higher
      G115-5 (FR-) - Body ground Always 10 kΩ or higher
      G116-1 (RR+) - Body ground Always 10 kΩ or higher
      G116-3 (RR-) - Body ground Always 10 kΩ or higher
      J7-3 (+) - Body ground Always 10 kΩ or higher
      J7-1 (-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT FRONT NO. 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

  4. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly connector.

      Click here

    2. Inspect the rear speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

  5. 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

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

  6. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for LH Side

    • *2: for RH Side


    1. Disconnect the G115 and G116 navigation receiver assembly connectors.

    2. Disconnect the K4*1 and/or J4*2 front No. 1 speaker assembly connector.

    3. Disconnect the M2*1 and/or L2*2 rear speaker assembly connector.

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition
      G115-2 (FL+) - K4-1 Always Below 1 Ω
      G115-6 (FL-) - K4-2 Always Below 1 Ω
      G116-2 (RL+) - M2-1 Always Below 1 Ω
      G116-6 (RL-) - M2-2 Always Below 1 Ω
      G115-2 (FL+) - Body ground Always 10 kΩ or higher
      G115-6 (FL-) - Body ground Always 10 kΩ or higher
      G116-2 (RL+) - Body ground Always 10 kΩ or higher
      G116-6 (RL-) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      G115-1 (FR+) - J4-1 Always Below 1 Ω
      G115-5 (FR-) - J4-2 Always Below 1 Ω
      G116-1 (RR+) - L2-1 Always Below 1 Ω
      G116-3 (RR-) - L2-2 Always Below 1 Ω
      G115-1 (FR+) - Body ground Always 10 kΩ or higher
      G115-5 (FR-) - Body ground Always 10 kΩ or higher
      G116-1 (RR+) - Body ground Always 10 kΩ or higher
      G116-3 (RR-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. 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

  8. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly connector.

      for Double Cab: Click here

      for Smart Cab: Click here

    2. Inspect the rear speaker assembly.

      for Double Cab: Click here

      for Smart Cab: Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    NG

    REPLACE REAR SPEAKER ASSEMBLY for Double Cab: Click here
    REPLACE REAR SPEAKER ASSEMBLY for Smart Cab: Click here