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, telematics transceiver*1 or speakers.


WIRING DIAGRAM


  1. for 10 Speakers

    B001LUFE03
    B001L4QE06
    *a Rear Speaker Assembly RH
    *b Rear Speaker Assembly LH
    *c No. 1 Speaker Assembly with Box
    *d Stereo Component Amplifier Assembly

  2. for 13 Speakers

    B001KTWE04
    B001LGPE03
    *a Rear No. 2 Speaker Assembly RH
    *b Rear No. 2 Speaker Assembly LH
    *c No. 1 Speaker Assembly with Box
    *d Stereo Component Amplifier Assembly

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 Navigation System Click here.

PROCEDURE


  1. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      for 10 Speakers A
      for 13 Speakers B

    B

    CHECK SPEAKER (OPERATION CHECK) Click here

    A

  2. CHECK SPEAKER (OPERATION CHECK)


    1. B001LK7

      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
      Result Proceed to
      Front No. 2 speaker assembly or front No. 3 speaker assembly A
      Front No. 1 speaker assembly B
      Front No. 4 speaker assembly C
      Rear speaker assembly D
      No. 1 speaker assembly with box 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. 1 SPEAKER ASSEMBLY) Click here

    C

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

    D

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

    E

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - NO. 1 SPEAKER ASSEMBLY WITH BOX) Click here

    A

  3. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      w/ Manual (SOS) Switch A
      w/o Manual (SOS) Switch B

    B

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY) Click here

    A

  4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - TELEMATICS TRANSCEIVER - FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY)


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the H145 telematics transceiver connector.

    3. Disconnect the I3 and I5 front No. 2 speaker assembly connectors.

    4. Disconnect the I4 and I6 front No. 3 speaker assembly connectors.

    5. Measure the resistance between the stereo component amplifier assembly and the telematics transceiver to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H157-5 (MR+) - H145-2 (SPI+) Always Below 1 Ω
      H157-20 (MR-) - H145-3 (SPI-) Always Below 1 Ω

    6. Measure the resistance between the front No. 2 speaker assembly RH and the telematics transceiver to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-5 (SPO+) - I3-2 Always Below 1 Ω
      H145-6 (SPO-) - I3-1 Always Below 1 Ω

    7. Measure the resistance between the front No. 2 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H157-4 (ML+) - I5-2 Always Below 1 Ω
      H157-19 (ML-) - I5-1 Always Below 1 Ω

    8. Measure the resistance between the front No. 3 speaker assembly RH and the telematics transceiver to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-5 (SPO+) - I4-2 Always Below 1 Ω
      H145-6 (SPO-) - I4-1 Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H157-4 (ML+) - I6-2 Always Below 1 Ω
      H157-19 (ML-) - I6-1 Always Below 1 Ω

    10. 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
      H157-5 (MR+) - Body ground Always 10 kΩ or higher
      H157-20 (MR-) - Body ground Always 10 kΩ or higher
      H157-4 (ML+) - Body ground Always 10 kΩ or higher
      H157-19 (ML-) - Body ground Always 10 kΩ or higher

    11. Measure the resistance between the telematics transceiver and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-5 (SPO+) - Body ground Always 10 kΩ or higher
      H145-6 (SPO-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT TELEMATICS TRANSCEIVER


    1. Remove the telematics transceiver Click here.

    2. B001MVFE30
      Text in Illustration
      *a

      Component without harness connected

      (Telematics Transceiver)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (SPI+) - 5 (SPO+) Always Below 1 Ω
      3 (SPI-) - 6 (SPO-) Always Below 1 Ω
      2 (SPI+) - 3 (SPI-) Always 10 kΩ or higher
      5 (SPO+) - 6 (SPO-) Always 10 kΩ or higher
      2 (SPI+) - Body ground Always 10 kΩ or higher
      3 (SPI-) - Body ground Always 10 kΩ or higher

    3. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to
      NG A
      OK B

    A

    REPLACE TELEMATICS TRANSCEIVER Click here

    B

    INSPECT FRONT NO. 2 SPEAKER ASSEMBLY Click here

  6. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY)


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the I3 and I5 front No. 2 speaker assembly connectors.

    3. Disconnect the I4 and I6 front No. 3 speaker assembly connectors.

    4. Measure the resistance between each of the front 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
      H157-5 (MR+) - I3-2 Always Below 1 Ω
      H157-20 (MR-) - I3-1 Always Below 1 Ω
      H157-4 (ML+) - I5-2 Always Below 1 Ω
      H157-19 (ML-) - I5-1 Always Below 1 Ω

    5. 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
      H157-5 (MR+) - I4-2 Always Below 1 Ω
      H157-20 (MR-) - I4-1 Always Below 1 Ω
      H157-4 (ML+) - I6-2 Always Below 1 Ω
      H157-19 (ML-) - I6-1 Always Below 1 Ω

    6. 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
      H157-5 (MR+) - Body ground Always 10 kΩ or higher
      H157-20 (MR-) - Body ground Always 10 kΩ or higher
      H157-4 (ML+) - Body ground Always 10 kΩ or higher
      H157-19 (ML-) - 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. B001LMWE30
      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 3.2 to 4.8 Ω

    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

    OK

  8. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY


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

    2. B001LXRE06
      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 10 kΩ or higher

    NG

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY Click here

    OK

  9. REPLACE FRONT NO. 3 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. 3 speaker assemblies that were disconnected.

      • When there is a possibility that either the right or left front No. 3 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.


    OK

    END

    NG

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

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


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the J1 and K1 front No. 1 speaker assembly connectors.

    3. 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
      H157-13 (FR+) - J1-1 Always Below 1 Ω
      H157-28 (FR-) - J1-2 Always Below 1 Ω
      H157-12 (FL+) - K1-1 Always Below 1 Ω
      H157-27 (FL-) - K1-2 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
      H157-13 (FR+) - Body ground Always 10 kΩ or higher
      H157-28 (FR-) - Body ground Always 10 kΩ or higher
      H157-12 (FL+) - Body ground Always 10 kΩ or higher
      H157-27 (FL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


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

    2. B001LJHE07
      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 3.2 to 4.8 Ω

    OK

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

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

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


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the I2 front No. 4 speaker assembly connector.

    3. Measure the resistance between the front No. 4 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
      H157-7 (CTR+) - I2-2 Always Below 1 Ω
      H157-22 (CTR-) - I2-1 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
      H157-7 (CTR+) - Body ground Always 10 kΩ or higher
      H157-22 (CTR-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY


    1. Remove the front No. 4 speaker assembly Click here.

    2. B001LMWE30
      Text in Illustration
      *a

      Component without harness connected

      (Front No. 4 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

    OK

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

    NG

    REPLACE FRONT NO. 4 SPEAKER ASSEMBLY Click here

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


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the L4 and M4 rear speaker assembly connectors.

    3. Measure the resistance between each of the rear 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
      H157-15 (RR+) - L4-1 Always Below 1 Ω
      H157-30 (RR-) - L4-2 Always Below 1 Ω
      H157-14 (RL+) - M4-1 Always Below 1 Ω
      H157-29 (RL-) - M4-2 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
      H157-15 (RR+) - Body ground Always 10 kΩ or higher
      H157-30 (RR-) - Body ground Always 10 kΩ or higher
      H157-14 (RL+) - Body ground Always 10 kΩ or higher
      H157-29 (RL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly Click here.

    2. B001LJHE07
      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 3.2 to 4.8 Ω

    OK

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

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

  16. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - NO. 1 SPEAKER ASSEMBLY WITH BOX)


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the P15 No. 1 speaker assembly with box connector.

    3. Measure the resistance between the No. 1 speaker assembly with box and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H157-6 (WF1+) - P15-2 (WF1+) Always Below 1 Ω
      H157-21 (WF1-) - P15-4 (WF2+) 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
      H157-6 (WF1+) - Body ground Always 10 kΩ or higher
      H157-21 (WF1-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. INSPECT NO. 1 SPEAKER ASSEMBLY WITH BOX


    1. Remove the No. 1 speaker assembly with box Click here.

    2. B001MTLE22
      Text in Illustration
      *a

      Component without harness connected

      (No. 1 Speaker Assembly with Box)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (WF1+) - 4 (WF2+) Always 1.6 to 2.4 Ω

    OK

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

    NG

    REPLACE NO. 1 SPEAKER ASSEMBLY WITH BOX Click here

  18. CHECK SPEAKER (OPERATION CHECK)


    1. B001LK7

      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
      Result Proceed to
      Front No. 2 speaker assembly or front No. 3 speaker assembly A
      Front No. 1 speaker assembly B
      Front No. 4 speaker assembly C
      Rear No. 2 speaker assembly D
      No. 1 speaker assembly with box 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. 1 SPEAKER ASSEMBLY) Click here

    C

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 4 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 - NO. 1 SPEAKER ASSEMBLY WITH BOX) Click here

    A

  19. CONFIRM MODEL


    1. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to
      w/ Manual (SOS) Switch A
      w/o Manual (SOS) Switch B

    B

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY) Click here

    A

  20. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - TELEMATICS TRANSCEIVER - FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY)


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the H145 telematics transceiver connector.

    3. Disconnect the I3 and I5 front No. 2 speaker assembly connectors.

    4. Disconnect the I4 and I6 front No. 3 speaker assembly connectors.

    5. Measure the resistance between the stereo component amplifier assembly and the telematics transceiver to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H157-5 (MR+) - H145-2 (SPI+) Always Below 1 Ω
      H157-20 (MR-) - H145-3 (SPI-) Always Below 1 Ω

    6. Measure the resistance between the front No. 2 speaker assembly RH and the telematics transceiver to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-5 (SPO+) - I3-2 Always Below 1 Ω
      H145-6 (SPO-) - I3-1 Always Below 1 Ω

    7. Measure the resistance between the front No. 2 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H157-4 (ML+) - I5-2 Always Below 1 Ω
      H157-19 (ML-) - I5-1 Always Below 1 Ω

    8. Measure the resistance between the front No. 3 speaker assembly RH and the telematics transceiver to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-5 (SPO+) - I4-2 Always Below 1 Ω
      H145-6 (SPO-) - I4-1 Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H157-4 (ML+) - I6-2 Always Below 1 Ω
      H157-19 (ML-) - I6-1 Always Below 1 Ω

    10. 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
      H157-5 (MR+) - Body ground Always 10 kΩ or higher
      H157-20 (MR-) - Body ground Always 10 kΩ or higher
      H157-4 (ML+) - Body ground Always 10 kΩ or higher
      H157-19 (ML-) - Body ground Always 10 kΩ or higher

    11. Measure the resistance between the telematics transceiver and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-5 (SPO+) - Body ground Always 10 kΩ or higher
      H145-6 (SPO-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  21. INSPECT TELEMATICS TRANSCEIVER


    1. Remove the telematics transceiver Click here.

    2. B001MVFE30
      Text in Illustration
      *a

      Component without harness connected

      (Telematics Transceiver)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (SPI+) - 5 (SPO+) Always Below 1 Ω
      3 (SPI-) - 6 (SPO-) Always Below 1 Ω
      2 (SPI+) - 3 (SPI-) Always 10 kΩ or higher
      5 (SPO+) - 6 (SPO-) Always 10 kΩ or higher
      2 (SPI+) - Body ground Always 10 kΩ or higher
      3 (SPI-) - Body ground Always 10 kΩ or higher

    3. Proceed to the next step based on the inspection result.

      Result
      Result Proceed to
      NG A
      OK B

    A

    REPLACE TELEMATICS TRANSCEIVER Click here

    B

    INSPECT FRONT NO. 2 SPEAKER ASSEMBLY Click here

  22. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY)


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the I3 and I5 front No. 2 speaker assembly connectors.

    3. Disconnect the I4 and I6 front No. 3 speaker assembly connectors.

    4. Measure the resistance between each of the front 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
      H157-5 (MR+) - I3-2 Always Below 1 Ω
      H157-20 (MR-) - I3-1 Always Below 1 Ω
      H157-4 (ML+) - I5-2 Always Below 1 Ω
      H157-19 (ML-) - I5-1 Always Below 1 Ω

    5. 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
      H157-5 (MR+) - I4-2 Always Below 1 Ω
      H157-20 (MR-) - I4-1 Always Below 1 Ω
      H157-4 (ML+) - I6-2 Always Below 1 Ω
      H157-19 (ML-) - I6-1 Always Below 1 Ω

    6. 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
      H157-5 (MR+) - Body ground Always 10 kΩ or higher
      H157-20 (MR-) - Body ground Always 10 kΩ or higher
      H157-4 (ML+) - Body ground Always 10 kΩ or higher
      H157-19 (ML-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  23. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


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

    2. B001LMWE30
      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 3.2 to 4.8 Ω

    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

    OK

  24. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY


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

    2. B001LXRE06
      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 10 kΩ or higher

    NG

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY Click here

    OK

  25. REPLACE FRONT NO. 3 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. 3 speaker assemblies that were disconnected.

      • When there is a possibility that either the right or left front No. 3 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.


    OK

    END

    NG

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

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


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the J1 and K1 front No. 1 speaker assembly connectors.

    3. 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
      H157-13 (FR+) - J1-1 Always Below 1 Ω
      H157-28 (FR-) - J1-2 Always Below 1 Ω
      H157-12 (FL+) - K1-1 Always Below 1 Ω
      H157-27 (FL-) - K1-2 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
      H157-13 (FR+) - Body ground Always 10 kΩ or higher
      H157-28 (FR-) - Body ground Always 10 kΩ or higher
      H157-12 (FL+) - Body ground Always 10 kΩ or higher
      H157-27 (FL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  27. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


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

    2. B001LJHE07
      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 3.2 to 4.8 Ω

    OK

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

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

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


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the I2 front No. 4 speaker assembly connector.

    3. Measure the resistance between the front No. 4 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
      H157-7 (CTR+) - I2-2 Always Below 1 Ω
      H157-22 (CTR-) - I2-1 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
      H157-7 (CTR+) - Body ground Always 10 kΩ or higher
      H157-22 (CTR-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  29. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY


    1. Remove the front No. 4 speaker assembly Click here.

    2. B001LMWE30
      Text in Illustration
      *a

      Component without harness connected

      (Front No. 4 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

    NG

    REPLACE FRONT NO. 4 SPEAKER ASSEMBLY Click here

    OK

  30. REPLACE FRONT NO. 4 SPEAKER ASSEMBLY


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

      OK
      Malfunction disappears.

    OK

    END

    NG

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

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


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the Q10 and P14 rear No. 2 speaker assembly connectors.

    3. 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
      H157-15 (RR+) - Q10-2 (+) Always Below 1 Ω
      H157-30 (RR-) - Q10-1 (-) Always Below 1 Ω
      H157-14 (RL+) - P14-2 (+) Always Below 1 Ω
      H157-29 (RL-) - P14-1 (-) 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
      H157-15 (RR+) - Body ground Always 10 kΩ or higher
      H157-30 (RR-) - Body ground Always 10 kΩ or higher
      H157-14 (RL+) - Body ground Always 10 kΩ or higher
      H157-29 (RL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  32. INSPECT REAR NO. 2 SPEAKER ASSEMBLY


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

    2. B001LMWE31
      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 4.6 to 7 Ω

    NG

    REPLACE REAR NO. 2 SPEAKER ASSEMBLY Click here

    OK

  33. 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 speaker assemblies that were disconnected.

      • When there is a possibility that either the right or left rear 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.


    OK

    END

    NG

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

  34. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - NO. 1 SPEAKER ASSEMBLY WITH BOX)


    1. Disconnect the H157 stereo component amplifier assembly connector.

    2. Disconnect the P15 No. 1 speaker assembly with box connector.

    3. Measure the resistance between the No. 1 speaker assembly with box and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H157-6 (WF1+) - P15-2 (WF1+) Always Below 1 Ω
      H157-8 (WF2+) - P15-4 (WF2+) 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
      H157-6 (WF1+) - Body ground Always 10 kΩ or higher
      H157-8 (WF2+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  35. INSPECT NO. 1 SPEAKER ASSEMBLY WITH BOX


    1. Remove the No. 1 speaker assembly with box Click here.

    2. B001MTLE11
      Text in Illustration
      *a

      Component without harness connected

      (No. 1 Speaker Assembly with Box)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (WF1+) - 4 (WF2+) Always 11.6 to 12.4 Ω

    OK

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

    NG

    REPLACE NO. 1 SPEAKER ASSEMBLY WITH BOX Click here