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Speaker Circuit: Procedure

  1. CHECK HARNESS AND CONNECTOR 
    1. Disconnect the connectors from the stereo component amplifier assembly and speakers.
    2. Measure the resistance between each of the front No. 1 speakers and the front No. 2 speakers to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G5-1 (+) - I5-1 Always Below 1 Ω
      G5-2 (-) - I5-2 Always Below 1 Ω
      G3-1 (+) - H5-1 Always Below 1 Ω
      G3-2 (-) - H5-2 Always Below 1 Ω
    3. Measure the resistance between the front No. 2 speaker LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F43-3 (FL+) - G5-3 (TWL+) Always Below 1 Ω
      F43-8 (FL-) - G5-4 (TWL-) Always Below 1 Ω
    4. w/o Manual (SOS) Switch

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      F43-10 (FR+) - G3-3 (VR+) Always Below 1 Ω
      F43-9 (FR-) - G3-4 (VR-) Always Below 1 Ω
    5. w/ Manual (SOS) Switch

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      F43-10 (FR+) - F38-2 (SPI+) Always Below 1 Ω
      F43-9 (FR-) - F38-3 (SPI-) Always Below 1 Ω
    6. w/ Manual (SOS) Switch

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      F38-5 (SPO+) - G3-3 (VR+) Always Below 1 Ω
      F38-6 (SPO-) - G3-4 (VR-) Always Below 1 Ω
    7. Measure the resistance between each of the rear No. 2 speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F43-4 (RL+) - K6-3 (+TW) Always Below 1 Ω
      F43-11 (RL-) - K6-1 (-TW) Always Below 1 Ω
      F43-5 (RR+) - J6-3 (+TW) Always Below 1 Ω
      F43-12 (RR-) - J6-1 (-TW) Always Below 1 Ω
    8. Measure the resistance between each of the rear No. 2 speakers and the rear speakers to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K6-4 (+) - K4-1 Always Below 1 Ω
      K6-2 (-) - K4-2 Always Below 1 Ω
      J6-4 (+) - J4-1 Always Below 1 Ω
      J6-2 (-) - J4-2 Always Below 1 Ω
    9. Measure the resistance between each of the rear stereo component speaker and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F24-1 (WF1+) - L37-2 (WF1+) Always Below 1 Ω
      F24-5 (WF1-) - L37-1 (WF1-) Always Below 1 Ω
      F24-2 (WF2+) - L37-4 (WF2+) Always Below 1 Ω
      F24-6 (WF2-) - L37-3 (WF2-) Always Below 1 Ω
    10. Measure the resistance between the front No. 3 speaker and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F24-8 (CTR+) - G2-2 Always Below 1 Ω
      F24-7 (CTR-) - G2-1 Always Below 1 Ω
    11. 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
      F43-3 (FL+) - Body ground Always 10 kΩ or higher
      F43-8 (FL-) - Body ground Always 10 kΩ or higher
      F43-10 (FR+) - Body ground Always 10 kΩ or higher
      F43-9 (FR-) - Body ground Always 10 kΩ or higher
      F43-4 (RL+) - Body ground Always 10 kΩ or higher
      F43-11 (RL-) - Body ground Always 10 kΩ or higher
      F43-5 (RR+) - Body ground Always 10 kΩ or higher
      F43-12 (RR-) - Body ground Always 10 kΩ or higher
      F24-1 (WF1+) - Body ground Always 10 kΩ or higher
      F24-5 (WF1-) - Body ground Always 10 kΩ or higher
      F24-2 (WF2+) - Body ground Always 10 kΩ or higher
      F24-6 (WF2-) - Body ground Always 10 kΩ or higher
      F24-8 (CTR+) - Body ground Always 10 kΩ or higher
      F24-7 (CTR-) - Body ground Always 10 kΩ or higher
    12. Measure the resistance between each of the front No. 1 speakers and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I5-1 - Body ground Always 10 kΩ or higher
      I5-2 - Body ground Always 10 kΩ or higher
      H5-1 - Body ground Always 10 kΩ or higher
      H5-2 - Body ground Always 10 kΩ or higher
    13. Measure the resistance between each of the rear speakers and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K4-1 - Body ground Always 10 kΩ or higher
      K4-2 - Body ground Always 10 kΩ or higher
      J4-1 - Body ground Always 10 kΩ or higher
      J4-2 - Body ground Always 10 kΩ or higher
    14. w/ Manual (SOS) Switch

      Measure the resistance between the front No. 2 speaker RH and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G3-3 (VR+) - Body ground Always 10 kΩ or higher
      G3-4 (VR-) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. INSPECT FRONT NO. 1 SPEAKER 
    1. Resistance check
      Fig 1: Identifying I5 & H5 Front No. 1 Speaker Connector Terminals
      GTY278526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        I5-1 - I5-2 Always 3.2 to 4.8 Ω
        H5-1 - H5-2 Always 3.2 to 4.8 Ω
        TEXT IN ILLUSTRATION

        *1 Component without harness connected
        (Front No. 1 Speaker)

    NG → See step   11 

    OK: Go to next step 

  3. INSPECT FRONT NO. 2 SPEAKER 
    1. Resistance check
      Fig 2: Identifying G5 & G3 Front No. 2 Speaker Connector Terminals
      GTY276701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        G5-3 (TWL+) - G5-4 (TWL-) Always 10 kΩ or higher
        G5-3 (TWL+) - G5-1 (+) Always Below 1 Ω
        G5-4 (TWL-) - G5-2 (-) Always Below 1 Ω
        G3-3 (VR+) - G5-4 (VR-) Always 10 kΩ or higher
        G3-3 (VR+) - G5-1 (+) Always Below 1 Ω
        G3-4 (VR-) - G5-2 (-) Always Below 1 Ω
        TEXT IN ILLUSTRATION

        *A for LH
        *B for RH
        *1 Component without harness connected
        (Front No. 2 Speaker)

    NG → See step   16 

    OK: Go to next step 

  4. REPLACE FRONT NO. 2 SPEAKER 
    1. Check that the malfunction disappears when a known good speaker is installed. Refer to REMOVAL .

      OK

      Malfunction disappears.

      HINT: 

      • Connect all the connectors to the front No. 2 speakers 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.

    NG → See step   5 

    OK → END (FRONT NO. 2 SPEAKER WAS DEFECTIVE) 

  5. INSPECT FRONT NO. 3 SPEAKER 
    1. Resistance check
      Fig 3: Identifying G2 Front No. 3 Speaker Connector Terminals
      GTY259777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        G2-1 - G2-2 Always 4.8 to 7.2 Ω
        TEXT IN ILLUSTRATION

        *1 Component without harness connected
        (Front No. 3 Speaker)

    NG → See step   12 

    OK: Go to next step 

  6. INSPECT REAR SPEAKER 
    1. Resistance check
      Fig 4: Identifying K4 & J4 Rear Speaker Connectors
      GTY278752Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        K4-1 - K4-2 Always 4 to 6 Ω
        J4-1 - J4-2 Always 4 to 6 Ω
        TEXT IN ILLUSTRATION

        *1 Component without harness connected
        (Rear Speaker)

    NG → See step   13 

    OK: Go to next step 

  7. INSPECT REAR NO. 2 SPEAKER 
    1. Resistance check
      Fig 5: Identifying K6 & J6 Inspect Rear No. 2 Speaker Connector Terminals
      GTY277179Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        K6-3 (+TW) - K6-1 (-TW) Always 10 kΩ or higher
        K6-3 (+TW) - K6-4 (+) Always Below 1 Ω
        K6-1 (-TW) - K6-2 (-) Always Below 1 Ω
        J6-3 (+TW) - J6-1 (-TW) Always 10 kΩ or higher
        J6-3 (+TW) - J6-4 (+) Always Below 1 Ω
        J6-1 (-TW) - J6-2 (-) Always Below 1 Ω
        TEXT IN ILLUSTRATION

        *1 Component without harness connected
        (Rear No. 2 Speaker)

    NG → See step   17 

    OK: Go to next step 

  8. REPLACE REAR NO. 2 SPEAKER 
    1. Check that the malfunction disappears when a known good speaker is installed. Refer to REMOVAL .

      OK

      Malfunction disappears.

      HINT: 

      • Connect all the connectors to the rear No. 2 speakers that were disconnected.
      • When there is a possibility that either the right or left rear speaker is defective, inspect by interchanging the right one with the left one.
      • Perform the above inspection on both LH and RH sides.

    NG → See step   9 

    OK → END (REAR NO. 2 SPEAKER WAS DEFECTIVE) 

  9. INSPECT REAR STEREO COMPONENT SPEAKER 
    1. Resistance check
      Fig 6: Identifying Rear Stereo Component Speaker Connector Terminals
      GTY274438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        L37-2 (WF1+) - L37-1 (WF1-) Always 2.4 to 3.6 Ω
        L37-4 (WF2+) - L37-3 (WF2-) Always 2.4 to 3.6 Ω
        TEXT IN ILLUSTRATION

        *1 Component without harness connected
        (Rear Stereo Component Speaker)
    2. Proceed to the next step based on the inspection result.

      Result

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

    B → See step   15 

    C → See step   14 

    A: Go to next step 

  10. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Resistance check
      Fig 7: Identifying F38 DCM Connector (Telematics Transceiver)
      GTY278232Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        F38-2 (SPI+) - F38-5 (SPO+) Always Below 1 Ω
        F38-3 (SPI-) - F38-6 (SPO-) Always Below 1 Ω
        F38-2 (SPI+) - F38-3 (SPI-) Always 10 kΩ or higher
        F38-5 (SPO+) - F38-6 (SPO-) Always 10 kΩ or higher
        F38-3 (SPI-) - Body ground Always 10 kΩ or higher
        F38-6 (SPO-) - Body ground Always 10 kΩ or higher
        TEXT IN ILLUSTRATION

        *1 Component without harness connected
        (DCM (Telematics Transceiver))

    NG → See step   18 

    OK → See step   15 

  11. REPLACE FRONT NO. 1 SPEAKER. Refer to  REMOVAL 
  12. REPLACE FRONT NO. 3 SPEAKER. Refer to  REMOVAL 
  13. REPLACE REAR SPEAKER. Refer to  REMOVAL 
  14. REPLACE REAR STEREO COMPONENT SPEAKER. Refer to  REMOVAL 
  15. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  16. REPLACE FRONT NO. 2 SPEAKER. Refer to  REMOVAL 
  17. REPLACE REAR NO. 2 SPEAKER. Refer to  REMOVAL 
  18. REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL 
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