AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Speaker Circuit

DESCRIPTION

If there is a short in a speaker circuit, the radio and display receiver assembly detects it and stops output to the speakers.

As a result, sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly, telematics transceiver* or speakers.


WIRING DIAGRAM

B0028CAE01
for 2 Speakers
*a Front No. 1 Speaker Assembly LH
*b Front No. 1 Speaker Assembly RH
*c Radio and Display Receiver Assembly
B0025Z5E01
B0028RXE02
B00262KE06

CAUTION / NOTICE / HINT

Note

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

Click here

PROCEDURE


  1. CHECK SPEAKER TYPE


    1. Check speaker type.

      Result
      Result Proceed to
      for 2 Speakers, for 4 Speakers (Single Cab) A
      for 4 Speakers (Double Cab, Smart Cab) B
      for 6 Speakers C

    B

    CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) Click here

    C

    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 G40 radio and display receiver assembly connector.

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

    3. for 4 Speakers (Single Cab):

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

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

      Standard Resistance
      for LH Side (for 2 Speakers):
      Tester Connection Condition Specified Condition
      G40-2 (FL+) - K4-1 Always Below 1 Ω
      G40-6 (FL-) - K4-2 Always Below 1 Ω
      G40-2 (FL+) or K4-1 - Body ground Always 10 kΩ or higher
      G40-6 (FL-) or K4-2 - Body ground Always 10 kΩ or higher
      for LH Side (for 4 Speakers [Single Cab]):
      Tester Connection Condition Specified Condition
      G40-2 (FL+) - K7-4 (TWL+) Always Below 1 Ω
      G40-6 (FL-) - K7-2 (TWL-) Always Below 1 Ω
      K7-3 (+) - K4-1 Always Below 1 Ω
      K7-1 (-) - K4-2 Always Below 1 Ω
      G40-2 (FL+) or K7-4 (TWL+) - Body ground Always 10 kΩ or higher
      G40-6 (FL-) or K7-2 (TWL-) - Body ground Always 10 kΩ or higher
      K7-3 (+) or K4-1 - Body ground Always 10 kΩ or higher
      K7-1 (-) or K4-2 - Body ground Always 10 kΩ or higher
      for RH Side (for 2 Speakers):
      Tester Connection Condition Specified Condition
      G40-1 (FR+) - J4-1 Always Below 1 Ω
      G40-5 (FR-) - J4-2 Always Below 1 Ω
      G40-1 (FR+) or J4-1 - Body ground Always 10 kΩ or higher
      G40-5 (FR-) or J4-2 - Body ground Always 10 kΩ or higher
      for RH Side (for 4 Speakers [Single Cab]):
      Tester Connection Condition Specified Condition
      G40-1 (FR+) - J7-4 (TWR+) Always Below 1 Ω
      G40-5 (FR-) - J7-2 (TWR-) Always Below 1 Ω
      J7-3 (+) - J4-1 Always Below 1 Ω
      J7-1 (-) - J4-2 Always Below 1 Ω
      G40-1 (FR+) or J7-4 (TWR+) - Body ground Always 10 kΩ or higher
      G40-5 (FR-) or J7-2 (TWR-) - Body ground Always 10 kΩ or higher
      J7-3 (+) or J4-1 - Body ground Always 10 kΩ or higher
      J7-1 (-) or J4-2 - 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.

      Click here

    2. Inspect the front No. 1 speaker assembly.

      Click here

      Result
      Result Proceed to
      OK (for 2 Speakers) A
      OK (for 4 Speakers [Single Cab]) B
      NG C

    A

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    C

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    B

  4. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


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

      Click here

    2. Check that sound is emitted from the speaker normally.

      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 the LH and RH sides.

      OK
      Malfunction disappears.
      Result
      Proceed to
      OK
      NG

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

  5. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for LH Side

    • *2: for RH Side

    • *3: w/o Telematics Transceiver

    • *4: w/ Telematics Transceiver


    1. Disconnect the G40 and G41 radio and display 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. Disconnect the G130 telematics transceiver connector.*4

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

      Standard Resistance
      for LH Side:
      Tester Connection Condition Specified Condition
      G40-2 (FL+) - K4-1 Always Below 1 Ω
      G40-6 (FL-) - K4-2 Always Below 1 Ω
      G41-2 (RL+) - M2-1 Always Below 1 Ω
      G41-6 (RL-) - M2-2 Always Below 1 Ω
      G40-2 (FL+) or K4-1 - Body ground Always 10 kΩ or higher
      G40-6 (FL-) or K4-2 - Body ground Always 10 kΩ or higher
      G41-2 (RL+) or M2-1 - Body ground Always 10 kΩ or higher
      G41-6 (RL-) or M2-2 - Body ground Always 10 kΩ or higher
      for RH Side:
      Tester Connection Condition Specified Condition
      G40-1 (FR+) - J4-1*3 Always Below 1 Ω
      G40-1 (FR+) - G130-2 (SPI+)*4 Always Below 1 Ω
      G40-5 (FR-) - J4-2*3 Always Below 1 Ω
      G40-5 (FR-) - G130-3 (SPI-)*4 Always Below 1 Ω
      G130-5 (SPO+) - J4-1*4 Always Below 1 Ω
      G130-6 (SPO-) - J4-2*4 Always Below 1 Ω
      G41-1 (RR+) - L2-1 Always Below 1 Ω
      G41-3 (RR-) - L2-2 Always Below 1 Ω
      G40-1 (FR+) or J4-1 - Body ground*3 Always 10 kΩ or higher
      G40-1 (FR+) or G130-2 (SPI+) - Body ground*4 Always 10 kΩ or higher
      G40-5 (FR-) or J4-2 - Body ground*3 Always 10 kΩ or higher
      G40-5 (FR-) or G130-3 (SPI-) - Body ground*4 Always 10 kΩ or higher
      G130-5 (SPO+) or J4-1 - Body ground*4 Always 10 kΩ or higher
      G130-6 (SPO-) or J4-2 - Body ground*4 Always 10 kΩ or higher
      G41-1 (RR+) or L2-1 - Body ground Always 10 kΩ or higher
      G41-3 (RR-) or L2-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Remove the front No. 1 speaker assembly.

      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

  7. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly.

      for Smart Cab: Click here

      for Double Cab: Click here

    2. Inspect the rear speaker assembly.

      for Smart Cab: Click here

      for Double Cab: Click here

      Result
      Result Proceed to
      OK (w/ Telematics Transceiver) A
      OK (w/o Telematics Transceiver) B
      NG C

    A

    GO TO STEP 12 Click here

    B

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    C

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

  8. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for LH Side

    • *2: for RH Side

    • *3: w/o Telematics Transceiver

    • *4: w/ Telematics Transceiver


    1. Disconnect the G40 and G41 radio and display 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. Disconnect the G130 telematics transceiver connector.*4

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

      Standard Resistance
      for LH Side:
      Tester Connection Condition Specified Condition
      G40-2 (FL+) - K7-4 (TWL+) Always Below 1 Ω
      G40-6 (FL-) - K7-2 (TWL-) Always Below 1 Ω
      K7-3 (+) - K4-1 Always Below 1 Ω
      K7-1 (-) - K4-2 Always Below 1 Ω
      G41-2 (RL+) - M2-1 Always Below 1 Ω
      G41-6 (RL-) - M2-2 Always Below 1 Ω
      G40-2 (FL+) or K7-4 (TWL+) - Body ground Always 10 kΩ or higher
      G40-6 (FL-) or K7-2 (TWL-) - Body ground Always 10 kΩ or higher
      K7-3 (+) or K4-1 - Body ground Always 10 kΩ or higher
      K7-1 (-) or K4-2 - Body ground Always 10 kΩ or higher
      G41-2 (RL+) or M2-1 - Body ground Always 10 kΩ or higher
      G41-6 (RL-) or M2-2 - Body ground Always 10 kΩ or higher
      for RH Side:
      Tester Connection Condition Specified Condition
      G40-1 (FR+) - J7-4 (TWR+)*3 Always Below 1 Ω
      G40-1 (FR+) - G130-2 (SPI+)*4 Always Below 1 Ω
      G40-5 (FR-) - J7-2 (TWR-)*3 Always Below 1 Ω
      G40-5 (FR-) - G130-3 (SPI-)*4 Always Below 1 Ω
      G130-5 (SPO+) - J7-4 (TWR+)*4 Always Below 1 Ω
      G130-6 (SPO-) - J7-2 (TWR-)*4 Always Below 1 Ω
      J7-3 (+) - J4-1 Always Below 1 Ω
      J7-1 (-) - J4-2 Always Below 1 Ω
      G41-1 (RR+) - L2-1 Always Below 1 Ω
      G41-3 (RR-) - L2-2 Always Below 1 Ω
      G40-1 (FR+) or J7-4 (TWR+) - Body ground*3 Always 10 kΩ or higher
      G40-1 (FR+) or G130-2 (SPI+) - Body ground*4 Always 10 kΩ or higher
      G40-5 (FR-) or J7-2 (TWR-) - Body ground*3 Always 10 kΩ or higher
      G40-5 (FR-) or G130-3 (SPI-) - Body ground*4 Always 10 kΩ or higher
      G130-5 (SPO+) or J7-4 (TWR+) - Body ground*4 Always 10 kΩ or higher
      G130-6 (SPO-) or J7-2 (TWR-) - Body ground*4 Always 10 kΩ or higher
      J7-3 (+) or J4-1 - Body ground Always 10 kΩ or higher
      J7-1 (-) or J4-2 - Body ground Always 10 kΩ or higher
      G41-1 (RR+) or L2-1 - Body ground Always 10 kΩ or higher
      G41-3 (RR-) or L2-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Remove the front No. 1 speaker assembly.

      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

  10. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly.

      for Smart Cab:

      Click here

      for Double Cab:

      Click here

    2. Inspect the rear speaker assembly.

      for Smart Cab:

      Click here

      for Double Cab:

      Click here

      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  11. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


    1. Replace the front No. 2 speaker assembly with a new or 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 the LH and RH sides.

      OK
      Malfunction disappears.
      Result
      Result Proceed to
      OK A
      NG (w/ Telematics Transceiver) B
      NG (w/o Telematics Transceiver) C

    A

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    C

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    B

  12. CHECK TELEMATICS TRANSCEIVER


    1. Replace the telematics transceiver with a new one.

      Click here

    2. Check the malfunction disappears.

      OK
      Malfunction disappears.
      Result
      Proceed to
      OK
      NG

    OK

    END (TELEMATICS TRANSCEIVER IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here