FixVault
Home › Lexus › 2008 › GX 470 › Repair and Diagnosis › Accessories & Equipment › Infotainment › Audio/Visual › Audio And Visual System › Speaker Circuit › Inspection Procedure

Inspection Procedure

  1. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      RESULT CHART

      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 

      RESULT CHART

      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 
    1. Disconnect the F9 and F10 speaker connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 1: Identifying Front No. 1 Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 

      RESULT CHART

      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) 
    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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 2: Identifying S40 Amplifier, F10 Speaker And M15 ECU Connector Terminals
    G05266100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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) 
    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 

      RESISTANCE SPECIFIED CONDITION

      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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 3: Identifying S40 Amplifier With F9 And F10 Speaker Connector Terminals
    G05266101Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  8. INSPECT FRONT NO. 2 SPEAKER 
    1. Disconnect the F13 and F14 speaker connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

      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
      Fig 4: Identifying Front No. 2 Speaker Connector Terminals
      G05266102Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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. Disconnect the F13 and F14 speaker connectors
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance: 

      for LH 

      RESISTANCE SPECIFIED CONDITION

      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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 5: Identifying S43 Amplifier With F13 And F14 Speaker Connector Terminals
    G05266103Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  10. INSPECT STEREO COMPONENT SPEAKER 
    1. Disconnect the F11 and F12 speaker connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

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

    NG: REPLACE STEREO COMPONENT SPEAKER 

    Fig 6: Identifying Stereo Component Speaker Connector Terminals
    G05266104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

  11. CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER - STEREO COMPONENT SPEAKER) 
    1. Disconnect the F11, F12, F13 and connectors.
    2. Measure the resistance according table below

      Standard resistance: 

      for LH 

      RESISTANCE SPECIFIED CONDITION

      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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 7: Identifying F11, F12, F13 And F14 Speaker Connector Terminals
    G05266105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  12. INSPECT FRONT STEREO COMPONENT SPEAKER 
    1. Disconnect the C6 speaker connector
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

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

    NG: REPLACE FRONT STEREO COMPONENT SPEAKER 

    Fig 8: Identifying Front Stereo Component Speaker Connector Terminals
    G05266104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

  13. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - FRONT STEREO COMPONENT SPEAKER) 
    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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 9: Identifying C6 Speaker And S41 Amplifier Connector Terminals
    G05266107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  14. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      RESULT CHART

      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 
    1. Disconnect the R22 and R23 speaker connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

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

    NG: REPLACE REAR SPEAKER 

    Fig 10: Identifying Rear Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

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

      RESISTANCE SPECIFIED CONDITION

      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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 11: Identifying S40 Amplifier With R22 And R23 Speaker Connector Terminals
    G05266109Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  17. INSPECT WOOFER BOX SPEAKER 
    1. Disconnect the W6 speaker connector
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

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

    NG: REPLACE WOOFER BOX SPEAKER 

    Fig 12: Identifying Woofer Box Speaker Connector Terminals
    G05846456Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

  18. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - WOOFER BOX SPEAKER) 
    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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 13: Identifying S41 Amplifier And W6 Speaker Connector Terminals
    G05266111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  19. INSPECT REAR SPEAKER 
    1. Disconnect the R22 and R23 speaker connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

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

    NG: REPLACE REAR SPEAKER 

    Fig 14: Identifying Rear Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

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

      RESISTANCE SPECIFIED CONDITION

      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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 15: Identifying S43 Amplifier With R22 And R23 Speaker Connector Terminals
    G05266113Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  21. INSPECT REAR NO. 2 SPEAKER 
    1. Disconnect the B8 and B9 speaker connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

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

    NG: REPLACE REAR NO. 2 SPEAKER 

    Fig 16: Identifying Rear No.2 Speaker Connector Terminals
    G05266104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

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

      RESISTANCE SPECIFIED CONDITION

      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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 17: Identifying S41 Amplifier With B8 And B9 Speaker Connector Terminals
    G05266115Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  23. INSPECT WOOFER BOX SPEAKER 
    1. Disconnect the W6 speaker connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFIED CONDITION

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

    NG: REPLACE WOOFER BOX SPEAKER 

    Fig 18: Identifying Woofer Box Speaker Connector Terminals
    G05266116Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

  24. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - WOOFER BOX SPEAKER) 
    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 

      RESISTANCE SPECIFIED CONDITION

      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 

    Fig 19: Identifying S41 Amplifier And W6 Speaker Connector Terminals
    G05266117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

About FixVault