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Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      SPEAKER RESULT TABLE

      Result Proceed to
      Malfunction in front speaker area A
      Malfunction in rear speaker area B

    B: Go to step   14 

    A: Go to Next step 

  2. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      SPEAKER RESULT TABLE

      Result Proceed to
      Front No. 1 speaker A
      Front No. 2 speaker B
      Stereo component speaker C
      Front stereo component speaker* D
      HINT:
      *: Only 12 speaker models

    B: Go to step   8 

    C: Go to step   10 

    D: Go to step   12 

    A: Go to Next step 

  3. INSPECT FRONT NO. 1 SPEAKER 
    Fig 1: Identifying Front No. 1 Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F9 and F10 speaker connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      FRONT NO. 1 SPEAKER

      Tester Connection Condition Specified Condition
      1 - 2 Always Approx. 4 Ω*1
      1 - 2 Always 7 to 9 Ω*2
      HINT:
      *1: for 9 speaker models
      *2: for 12 speaker models

    NG: REPLACE FRONT NO. 1 SPEAKER 

    OK: Go To Next Step 

  4. CHECK DEFECTIVE SPEAKER AND VEHICLE EQUIPMENT 
    1. Check which side of the vehicle the defective speaker is on. Also, check if the vehicle is equipped with the LEXUS Link System.

      Result 

      DEFECTIVE SPEAKER AND VEHICLE EQUIPMENT

      Defective speaker location Proceed to
      Defective speaker is on right side (w/ LEXUS Link System) A
      Defective speaker is on right side (w/o LEXUS Link System) B
      Defective speaker is on left side B

    B: Go to step   7 

    A: Go to Next step 

  5. CHECK HARNESS AND CONNECTOR (MAYDAY ECU - STEREO COMPONENT AMPLIFIER AND FRONT NO. 1 SPEAKER) 
    Fig 2: Identifying S40, F10 & M15 Connector Terminals
    G05266100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S40 amplifier connector.
    2. Disconnect the F10 speaker connector.
    3. Disconnect the M15 ECU connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      MAYDAY ECU - STEREO COMPONENT AMPLIFIER AND FRONT NO. 1 SPEAKER

      Tester Connection Condition Specified Condition
      F10-1 - M15-2 (SPO+) Always Below 1 Ω
      F10-2 - M15-3 (SPO-) Always Below 1 Ω
      S40-1 (FR+) - M15-10 (SPI+) Always Below 1 Ω
      S40-5 (FR-) - M15-11 (SPI-) Always Below 1 Ω
      M15-2 (SPO+) - Body ground Always 10 kΩ or higher
      M15-3 (SPO-) - Body ground Always 10 kΩ or higher
      M15-10 (SPI+) - Body ground Always 10 kΩ or higher
      M15-11 (SPI-) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go To Next Step 

  6. CHECK STEREO COMPONENT AMPLIFIER (OPERATION) 
    1. After replacing the stereo component amplifier with a normal one, check that the audio sound can be heard from the front RH side speaker.

      OK: Audio sound can be heard. 

    NG: REPLACE MAYDAY ECU 

    OK: END (STEREO COMPONENT AMPLIFIER IS DEFECTIVE) 

  7. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 1 SPEAKER) 
    Fig 3: Checking Harness & Connector (Stereo Component Amplifier - Front No. 1 Speaker
    G05266101Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F9 and F10 speaker connectors.
    2. Disconnect the S40 amplifier connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance: 

      for LH 

      STEREO COMPONENT AMPLIFIER - FRONT NO. 1 SPEAKER LH

      Tester Connection Condition Specified Condition
      S40-2 (FL+) - F9-1 Always Below 1 Ω
      S40-6 (FL-) - F9-2 Always Below 1 Ω
      S40-2 (FL+) - Body ground Always 10 kΩ or higher
      S40-6 (FL-) - Body ground Always 10 kΩ or higher

      for RH 

      STEREO COMPONENT AMPLIFIER - FRONT NO. 1 SPEAKER RH

      Tester Connection Condition Specified Condition
      S40-1 (FR+) - F10-1 Always Below 1 Ω
      S40-5 (FR-) - F10-2 Always Below 1 Ω
      S40-1 (FR+) - Body ground Always 10 kΩ or higher
      S40-5 (FR-) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  8. INSPECT FRONT NO. 2 SPEAKER 
    Fig 4: Identifying Front No. 2 Speaker Connector Terminals
    G05266143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F13 and F14 speaker connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      FRONT NO. 2 SPEAKER

      Tester Connection Condition Specified Condition
      1 - 2 Always Approx. 4 Ω*1
      1 - 2 Always 4 to 8 Ω*2
      HINT:
      *1: for 9 speaker models
      *2: for 12 speaker models

    NG: REPLACE FRONT NO. 2 SPEAKER 

    OK: Go To Next Step 

  9. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER) 
    1. Disconnect the S41 amplifier connector.
      2. Fig 5: Checking Harness & Connector (Stereo Component Amplifier - Front No. 2 Speaker
      G05266103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the F13 and F14 speaker connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance: 

      for LH 

      STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER LH

      Tester Connection Condition Specified Condition
      S43-2 (ML+) - F13-4 (+) Always Below 1 Ω
      S43-6 (ML-) - F13-3 (-) Always Below 1 Ω
      S43-2 (ML+) - Body ground Always 10 kΩ or higher
      S43-6 (ML-) - Body ground Always 10 kΩ or higher

      for RH 

      STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER RH

      Tester Connection Condition Specified Condition
      S43-8 (MR+) - F14-4 (+) Always Below 1 Ω
      S43-7 (MR-) - F14-3 (-) Always Below 1 Ω
      S43-8 (MR+) - Body ground Always 10 kΩ or higher
      S43-7 (MR-) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  10. INSPECT STEREO COMPONENT SPEAKER 
    Fig 6: Identifying Stereo Component Speaker Connector Terminals
    G05266104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F11 and F12 speaker connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STEREO COMPONENT SPEAKER

      Tester Connection Condition Specified Condition
      1 - 2 Always Approx. 4 Ω

    NG: REPLACE STEREO COMPONENT SPEAKER 

    OK: Go To Next Step 

  11. CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER - STEREO COMPONENT SPEAKER) 
    Fig 7: Identifying F11, F12, F13 & F14 Speaker Connector Terminals
    G05266105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F11, F12, F13 and F14 speaker connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance: 

      for LH 

      FRONT NO. 2 SPEAKER - STEREO COMPONENT SPEAKER LH

      Tester Connection Condition Specified Condition
      F13-1 (-) - F11-1 Always Below 1 Ω
      F13-2 (+) - F11-2 Always Below 1 Ω
      F13-1 (-) - Body ground Always 10 kΩ or higher
      F13-2 (+) - Body ground Always 10 kΩ or higher

      for RH 

      FRONT NO. 2 SPEAKER - STEREO COMPONENT SPEAKER RH

      Tester Connection Condition Specified Condition
      F14-1 (-) - F12-1 Always Below 1 Ω
      F14-2 (+) - F12-2 Always Below 1 Ω
      F14-1 (-) - Body ground Always 10 kΩ or higher
      F14-2 (+) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  12. INSPECT FRONT STEREO COMPONENT SPEAKER 
    Fig 8: Identifying Front Stereo Component Speaker Connector Terminals
    G05266104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the C6 speaker connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      FRONT STEREO COMPONENT SPEAKER

      Tester Connection Condition Specified Condition
      1 - 2 Always 7 to 9 Ω

    NG: REPLACE FRONT STEREO COMPONENT SPEAKER 

    OK: Go To Next Step 

  13. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT STEREO COMPONENT SPEAKER) 
    Fig 9: Identifying S41 & C6 Connector Terminals
    G05266107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the C6 speaker connector.
    2. Disconnect the S41 amplifier connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STEREO COMPONENT AMPLIFIER - FRONT STEREO COMPONENT SPEAKER

      Tester Connection Condition Specified Condition
      S41-3 (CTR+) - C6-2 Always Below 1 Ω
      S41-9 (CTR-) - C6-1 Always Below 1 Ω
      S41-3 (CTR+) - Body ground Always 10 kΩ or higher
      S41-9 (CTR-) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  14. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      SPEAKER RESULT TABLE

      Result Proceed to
      Rear speaker (for 9 speaker models) A
      Woofer box speaker (for 9 speaker models) B
      Rear speaker (for 12 speaker models) C
      Rear No. 2 speaker (for 12 speaker models) D
      Woofer box speaker (for 12 speaker models) E

    B: Go to step   17 

    C: Go to step   19 

    D: Go to step   21 

    E: Go to step   23 

    A: Go to Next step 

  15. INSPECT REAR SPEAKER 
    Fig 10: Identifying Rear Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R22 and R23 speaker connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      REAR SPEAKER

      Tester Connection Condition Specified Condition
      1 - 2 Always Approx. 4 Ω

    NG: REPLACE REAR SPEAKER 

    OK: Go To Next Step 

  16. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR SPEAKER) 
    Fig 11: Checking Harness & Connector (Stereo Component Amplifier - Rear Speaker)
    G05266109Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S40 amplifier connector.
    2. Disconnect the R22 and R23 speaker connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      for LH 

      STEREO COMPONENT AMPLIFIER - REAR SPEAKER LH

      Tester Connection Condition Specified Condition
      S40-3 (RL+) - R22-1 Always Below 1 Ω
      S40-9 (RL-) - R22-2 Always Below 1 Ω
      S40-3 (RL+) - Body ground Always 10 kΩ or higher
      S40-9 (RL-) - Body ground Always 10 kΩ or higher

      for RH 

      STEREO COMPONENT AMPLIFIER - REAR SPEAKER RH

      Tester Connection Condition Specified Condition
      S40-4 (RR+) - R23-1 Always Below 1 Ω
      S40-10 (RR-) - R23-2 Always Below 1 Ω
      S40-4 (RR+) - Body ground Always 10 kΩ or higher
      S40-10 (RR-) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  17. INSPECT WOOFER BOX SPEAKER 
    Fig 12: Identifying Woofer Box Speaker Connector Terminals
    G05266151Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the W6 speaker connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      WOOFER BOX SPEAKER

      Tester Connection Condition Specified Condition
      1 - 3 Always Approx. 4 Ω
      2 - 4 Always

    NG: REPLACE WOOFER BOX SPEAKER 

    OK: Go To Next Step 

  18. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - WOOFER BOX SPEAKER) 
    Fig 13: Identifying S41 & W6 Connector Terminals
    G05266111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S41 amplifier connector.
    2. Disconnect the W6 speaker connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STEREO COMPONENT AMPLIFIER - WOOFER BOX SPEAKER

      Tester Connection Condition Specified Condition
      S41-1 (WF1+) - W6-2 (+) Always Below 1 Ω
      S41-5 (WF1-) - W6-4 (-) Always Below 1 Ω
      S41-2 (WF2+) - W6-1 (+) Always Below 1 Ω
      S41-6 (WF2-) - W6-3 (-) Always Below 1 Ω
      S41-1 (WF1+) - Body ground Always 10 kΩ or higher
      S41-5 (WF1-) - Body ground Always 10 kΩ or higher
      S41-2 (WF2+) - Body ground Always 10 kΩ or higher
      S41-6 (WF2-) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  19. INSPECT REAR SPEAKER 
    Fig 14: Identifying Rear Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R22 and R23 speaker connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      REAR SPEAKER

      Tester Connection Condition Specified Condition
      1 - 2 Always 14 to 18 Ω

    NG: REPLACE REAR SPEAKER 

    OK: Go To Next Step 

  20. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR SPEAKER) 
    Fig 15: Checking Harness & Connector (Stereo Component Amplifier - Rear Speaker)
    G05266113Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S43 amplifier connector.
    2. Disconnect the R22 and R23 speaker connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      for LH 

      STEREO COMPONENT AMPLIFIER - REAR SPEAKER LH

      Tester Connection Condition Specified Condition
      S43-3 (RL+) - R22-1 Always Below 1 Ω
      S43-9 (RL-) - R22-2 Always Below 1 Ω
      S43-3 (RL+) - Body ground Always 10 kΩ or higher
      S43-9 (RL-) - Body ground Always 10 kΩ or higher

      for RH 

      STEREO COMPONENT AMPLIFIER - REAR SPEAKER RH

      Tester Connection Condition Specified Condition
      S43-4 (RR+) - R23-1 Always Below 1 Ω
      S43-10 (RR-) - R23-2 Always Below 1 Ω
      S43-4 (RR+) - Body ground Always 10 kΩ or higher
      S43-10 (RR-) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  21. INSPECT REAR NO. 2 SPEAKER 
    Fig 16: Identifying Rear No. 2 Speaker Connector Terminals
    G05266104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B8 and B9 speaker connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      REAR NO. 2 SPEAKER

      Tester Connection Condition Specified Condition
      1 - 2 Always 7 to 9 Ω

    NG: REPLACE REAR NO. 2 SPEAKER 

    OK: Go To Next Step 

  22. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - REAR NO. 2 SPEAKER) 
    Fig 17: Checking Harness & Connector (Stereo Component Amplifier - Rear No. 2 Speaker)
    G05266115Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B8 and B9 speaker connectors.
    2. Disconnect the S41 amplifier connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      for LH 

      STEREO COMPONENT AMPLIFIER - REAR NO. 2 SPEAKER LH

      Tester Connection Condition Specified Condition
      S41-8 (SL+) - B8-2 Always Below 1 Ω
      S41-7 (SL-) - B8-1 Always Below 1 Ω
      S41-8 (SL+) - Body ground Always 10 kΩ or higher
      S41-7 (SL-) - Body ground Always 10 kΩ or higher

      for RH 

      STEREO COMPONENT AMPLIFIER - REAR NO. 2 SPEAKER RH

      Tester Connection Condition Specified Condition
      S41-2 (SR+) - B9-2 Always Below 1 Ω
      S41-6 (SR-) - B9-1 Always Below 1 Ω
      S41-2 (SR+) - Body ground Always 10 kΩ or higher
      S41-6 (SR-) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  23. INSPECT WOOFER BOX SPEAKER 
    Fig 18: Identifying Woofer Box Speaker Connector Terminals
    G05266116Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the W6 speaker connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      WOOFER BOX SPEAKER

      Tester Connection Condition Specified Condition
      2 - 4 Always 7 to 9 Ω

    NG: REPLACE WOOFER BOX SPEAKER 

    OK: Go To Next Step 

  24. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - WOOFER BOX SPEAKER) 
    Fig 19: Identifying S41 & W6 Connector Terminals
    G05266117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S41 amplifier connector.
    2. Disconnect the W6 speaker connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STEREO COMPONENT AMPLIFIER - WOOFER BOX SPEAKER

      Tester Connection Condition Specified Condition
      S41-1 (WF1+) - W6-2 (+) Always Below 1 Ω
      S41-5 (WF1-) - W6-4 (-) Always Below 1 Ω
      S41-1 (WF1+) - Body ground Always 10 kΩ or higher
      S41-5 (WF1-) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

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