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Inspection Procedure

  1. CHECK AUDIO MODELS 
    1. Check the audio model.

      Result 

      RESULT REFERENCE

      Model Proceed to
      CD changer models A
      DVD changer models B

    B: Go to  step  20

    A: Go to next step 

  2. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      RESULT REFERENCE

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

    B: Go to  step  13

    A: Go to next step 

  3. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      RESULT REFERENCE

      Result Proceed to
      Front stereo component speaker A
      Front No. 2 speaker B
      Front No. 1 speaker C

    B: Go to  step  6

    C: Go to  step  11

    A: Go to next step 

  4. INSPECT FRONT STEREO COMPONENT SPEAKER 
    1. Disconnect the L2 speaker connector.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 - 2 Approx. 10 Ω
    Fig 1: Identifying L2 Speaker Connector Terminals
    G05266104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT STEREO COMPONENT SPEAKER 

    OK: Go to next step 

  5. CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - FRONT STEREO COMPONENT SPEAKER) 
    1. Disconnect the L2 speaker connector.
    2. Disconnect the U44 amplifier connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U44-3 (CTR+) - L2-1 Below 1 Ω
      U44-9 (CTR-) - L2-2 Below 1 Ω
      U44-3 (CTR+) - Body ground 10 kΩ or higher
      U44-9 (CTR-) - Body ground 10 kΩ or higher
    Fig 2: Identifying U44 Amplifier And L2 Speaker Connector Terminals
    G05299458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  6. INSPECT FRONT NO. 2 SPEAKER 
    1. Disconnect the K23 and K62 speaker connectors.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      K23-1 (TWL+) - K23-2 (TWL-) Approx. 4 Ω
      K62-1 (TWR+) - K62-2 (TWR-) Approx. 4 Ω
    Fig 3: Identifying K23 And K62 Speaker Connector Terminals
    G05299459Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT NO. 2 SPEAKER 

    OK: Go to next step 

  7. 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 REFERENCE

    Defective speaker location Specified Condition
    Defective speaker is on right side (with LEXUS Link System) A
    Defective speaker is on right side (without LEXUS Link System) B
    Defective speaker is on left side (with LEXUS Link System) B

    B: Go to  step  10

    A: Go to next step 

  8. CHECK WIRE HARNESS (MAYDAY ECU - STEREO COMPONENT AMPLIFIER AND FRONT NO. 2 SPEAKER) 
    1. Disconnect the U30 amplifier connector.
    2. Disconnect the K62 speaker connector.
    3. Disconnect the U45 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      K62-1 (TWR+) - U45-2 (SPO+) Below 1 Ω
      K62-2 (TWR-) - U45-3 (SPO-) Below 1 Ω
      U30-8 (FR+) - U45-10 (SPI+) Below 1 Ω
      U30-7 (FR-) - U45-11 (SPI-) Below 1 Ω
      K62-1 (TWR+) - Body ground 10 kΩ or higher
      K62-2 (TWR-) - Body ground 10 kΩ or higher
      U30-8 (FR+) - Body ground 10 kΩ or higher
      U30-7 (FR-) - Body ground 10 kΩ or higher
    Fig 4: Identifying Mayday ECU, Stereo Component Amplifier And Front No. 2 Speaker Connector Terminals
    G05299460Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  9. CHECK STEREO COMPONENT AMPLIFIER (OPERATION) 
    1. After replacing the stereo component amplifier with a normal one, check that 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) 

  10. CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER) 
    1. Disconnect the U30 amplifier connector.
    2. Disconnect the K23 and K62 speaker connectors.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U30-2 (FL+) - K23-1 (TWL+) Below 1 Ω
      U30-6 (FL-) - K23-2 (TWL-) Below 1 Ω
      U30-8 (FR+) - K62-1 (TWR+) Below 1 Ω
      U30-7 (FR-) - K62-2 (TWR-) Below 1 Ω
      U30-2 (FL+) - Body ground 10 kΩ or higher
      U30-6 (FL-) - Body ground 10 kΩ or higher
      U30-8 (FR+) - Body ground 10 kΩ or higher
      U30-7 (FR-) - Body ground 10 kΩ or higher
    Fig 5: Identifying Stereo Component Amplifier - Front No. 2 Speaker Connector Terminals
    G05299523Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  11. INSPECT FRONT NO. 1 SPEAKER 
    1. Disconnect the M7 and M1 speaker connectors.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 - 2 Approx. 4 Ω
    Fig 6: Identifying N1, M1, O1 And P1 Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT NO. 1 SPEAKER 

    OK: Go to next step 

  12. CHECK WIRE HARNESS (FRONT NO. 2 SPEAKER - FRONT NO. 1 SPEAKER) 
    1. Disconnect the K23, K62, M7 and M1 speaker connectors.
    2. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      K23-3 (+) - M7-1 Below 1 Ω
      K23-4 (-) - M7-2 Below 1 Ω
      K62-3 (+) - M1-1 Below 1 Ω
      K62-4 (-) - M1-2 Below 1 Ω
    Fig 7: Identifying Front No. 2 Speaker And Front No. 1 Speaker Connector Terminals
    G05299525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE FRONT NO. 2 SPEAKER 

  13. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      RESULT REFERENCE

      Result Proceed to
      Rear No. 2 speaker A
      Rear No. 1 speaker B
      Stereo component speaker C

    B: Go to  step  16

    C: Go to  step  18

    A: Go to next step 

  14. INSPECT REAR NO. 2 SPEAKER 
    1. Disconnect the S8 and S4 speaker connectors.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 (+TW) - 2 (-TW) Approx. 4 Ω
    Fig 8: Identifying Rear No. 2 Speaker Connector Terminals
    G05299464Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE REAR NO. 2 SPEAKER 

    OK: Go to next step 

  15. CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - REAR NO. 2 SPEAKER) 
    1. Disconnect the U30 amplifier connector.
    2. Disconnect the S8 and S4 speaker connectors.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U30-3 (RL+) - S8-1 (+TW) Below 1 Ω
      U30-9 (RL-) - S8-2 (-TW) Below 1 Ω
      U30-4 (RR+) - S4-1 (+TW) Below 1 Ω
      U30-10 (RR-) - S4-1 (-TW) Below 1 Ω
      U30-3 (RL+) - Body ground 10 kΩ or higher
      U30-9 (RL-) - Body ground 10 kΩ or higher
      U30-4 (RR+) - Body ground 10 kΩ or higher
      U30-10 (RR-) - Body ground 10 kΩ or higher
    Fig 9: Identifying Stereo Component Amplifier And Rear No. 2 Speaker Connector Terminals
    G05299527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  16. INSPECT REAR NO. 1 SPEAKER 
    1. Disconnect the O1 and O6 speaker connectors.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 - 2 Approx. 4 Ω
    Fig 10: Identifying Rear No. 1 Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE REAR NO. 1 SPEAKER 

    OK: Go to next step 

  17. CHECK WIRE HARNESS (REAR NO. 2 SPEAKER - REAR NO. 1 SPEAKER) 
    1. Disconnect the S8, S4, O1 and O6 speaker connectors.
    2. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      S8-3 (+) - O6-1 Below 1 Ω
      S8-4 (-) - O6-2 Below 1 Ω
      S4-3 (+) - O1-1 Below 1 Ω
      S4-4 (-) - O1-2 Below 1 Ω
    Fig 11: Identifying Rear No. 2 Speaker And Rear No. 1 Speaker Connector Terminals
    G05299467Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE REAR NO. 2 SPEAKER 

  18. INSPECT STEREO COMPONENT SPEAKER 
    1. Disconnect the U21 speaker connector.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 (WF2-) - 2 (WF2+) Approx. 2.5 Ω
      3 (WF1-) - 4 (WF1+)
    Fig 12: Identifying Stereo Component Speaker Connector Terminals
    G05299468Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE STEREO COMPONENT SPEAKER 

    OK: Go to next step 

  19. CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - STEREO COMPONENT SPEAKER) 
    1. Disconnect the U44 amplifier connector.
    2. Disconnect the U21 speaker connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U44-1 (WFL+) - U21-4 (WF1+) Below 1 Ω
      U44-5 (WFL-) - U21-3 (WF1-) Below 1 Ω
      U44-2 (WFR+) - U21-2 (WF2+) Below 1 Ω
      U44-6 (WFR-) - U21-1 (WF2-) Below 1 Ω
      U44-1 (WFL+) - Body ground 10 kΩ or higher
      U44-5 (WFL-) - Body ground 10 kΩ or higher
      U44-2 (WFR+) - Body ground 10 kΩ or higher
      U44-6 (WFR-) - Body ground 10 kΩ or higher
    Fig 13: Identifying Stereo Component Amplifier And Stereo Component Speaker Connector Terminals
    G05299469Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  20. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      RESULT REFERENCE

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

    B: Go to  step  31

    A: Go to next step 

  21. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      RESULT REFERENCE

      Result Proceed to
      Front stereo component speaker A
      Front No. 2 speaker B
      Front No. 1 speaker C

    B: Go to  step  24

    C: Go to  step  29

    A: Go to next step 

  22. INSPECT FRONT STEREO COMPONENT SPEAKER 
    1. Disconnect the L2 speaker connector.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 - 2 7 to 9 Ω
    Fig 14: Identifying Front Stereo Component Speaker Connector Terminals
    G05266104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT STEREO COMPONENT SPEAKER 

    OK: Go to next step 

  23. CHECK SPEAKER (STEREO COMPONENT AMPLIFIER - FRONT STEREO COMPONENT SPEAKER) 
    1. Disconnect the L2 speaker connector.
    2. Disconnect the U31 amplifier connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U31-3 (CTR+) - L2-1 Below 1 Ω
      U31-12 (CTR-) - L2-2 Below 1 Ω
      U31-3 (CTR+) - Body ground 10 kΩ or higher
      U31-12 (CTR-) - Body ground 10 kΩ or higher
    Fig 15: Identifying Stereo Component Amplifier And Stereo Component Speaker Connector Terminals
    G05299471Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  24. INSPECT FRONT NO. 2 SPEAKER 
    1. Disconnect the K23 and K62 speaker connectors.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      K23-1 (TWL+) - K23-2 (TWL-) 6 to 10 Ω
      K62-1 (TWR+) - K62-2 (TWR-) 6 to 10 Ω
    Fig 16: Identifying Front Speaker Connector Terminals
    G05299459Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT NO. 2 SPEAKER 

    OK: Go to next step 

  25. 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 REFERENCE

    Defective speaker location Specified Condition
    Defective speaker is on right side (with LEXUS Link System) A
    Defective speaker is on right side (without LEXUS Link System) B
    Defective speaker is on left side (with LEXUS Link System) B

    B: Go to  step  28

    A: Go to next step 

  26. CHECK WIRE HARNESS (MAYDAY ECU - STEREO COMPONENT AMPLIFIER AND FRONT NO. 2 SPEAKER) 
    1. Disconnect the U31 amplifier connector.
    2. Disconnect the K62 speaker connector.
    3. Disconnect the U45 ECU connector.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      K62-1 (TWR+) - U45-2 (SPO+) Below 1 Ω
      K62-2 (TWR-) - U45-3 (SPO-) Below 1 Ω
      U31-9 (FR+) - U45-10 (SPI+) Below 1 Ω
      U31-20 (FR-) - U45-11 (SPI-) Below 1 Ω
      K62-1 (TWR+) - Body ground 10 kΩ or higher
      K62-2 (TWR-) - Body ground 10 kΩ or higher
      U31-9 (FR+) - Body ground 10 kΩ or higher
      U31-20 (FR-) - Body ground 10 kΩ or higher
    Fig 17: Identifying Mayday ECU, Stereo Component Amplifier And Front Speaker Connector Terminals
    G05299473Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  27. CHECK STEREO COMPONENT AMPLIFIER (OPERATION) 
    1. After replacing the stereo component amplifier with a normal one, check that 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) 

  28. CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - FRONT NO. 2 SPEAKER) 
    1. Disconnect the U31 amplifier connector.
    2. Disconnect the K23 and K62 speaker connectors.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U31-8 (FL+) - K23-1 (TWL+) Below 1 Ω
      U31-19 (FL-) - K23-2 (TWL-) Below 1 Ω
      U31-9 (FR+) - K62-1 (TWR+) Below 1 Ω
      U31-20 (FR-) - K62-2 (TWR-) Below 1 Ω
      U31-8 (FL+) - Body ground 10 kΩ or higher
      U31-19 (FL-) - Body ground 10 kΩ or higher
      U31-9 (FR+) - Body ground 10 kΩ or higher
      U31-20 (FR-) - Body ground 10 kΩ or higher
    Fig 18: Identifying Stereo Component Amplifier And Front Speaker Connector Terminals
    G05299536Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  29. INSPECT FRONT NO. 1 SPEAKER 
    1. Disconnect the M8 and M2 speaker connectors.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 - 2 6 to 10 Ω
    Fig 19: Identifying Front No 1 Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT NO. 1 SPEAKER 

    OK: Go to next step 

  30. CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - FRONT NO. 1 SPEAKER) 
    1. Disconnect the U30 amplifier connector.
    2. Disconnect the M8 and M2 speaker connectors.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U30-3 (WFL+) - M8-1 Below 1 Ω
      U30-9 (WFL-) - M8-2 Below 1 Ω
      U30-4 (WFR+) - M2-1 Below 1 Ω
      U30-10 (WFR-) - M2-2 Below 1 Ω
      U30-3 (WFL+) - Body ground 10 kΩ or higher
      U30-9 (WFL-) - Body ground 10 kΩ or higher
      U30-4 (WFR+) - Body ground 10 kΩ or higher
      U30-10 (WFR-) - Body ground 10 kΩ or higher
    Fig 20: Identifying Stereo Component Amplifier And Front No 1 Speaker Connector Terminals
    G05299538Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  31. CHECK SPEAKER 
    1. Check the malfunctioning speakers.

      Result 

      RESULT REFERENCE

      Result Proceed to
      Rear No. 2 speaker A
      Rear No. 1 speaker B
      Rear header speaker C
      Stereo component speaker D

    B: Go to  step  34

    C:  Go to step  36

    D:  Go to step  38

    A: Go to next step 

  32. INSPECT REAR NO. 2 SPEAKER 
    1. Check that the malfunction disappears when the speaker is replaced with a normal one.

      OK: 

      Malfunction disappears. 

      HINT:

      • Connect all the connectors to the rear No. 2 speakers.
      • 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 inspection above on both LH and RH sides.

    OK: REPLACE REAR NO. 2 SPEAKER 

    NG: Go to next step 

  33. CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - REAR NO. 2 SPEAKER) 
    1. Disconnect the U31 amplifier connector.
    2. Disconnect the S8 and S4 speaker connectors.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U31-6 (RL+) - S8-1 (+TW) Below 1 Ω
      U31-17 (RL-) - S8-2 (-TW) Below 1 Ω
      U31-7 (RR+) - S4-1 (+TW) Below 1 Ω
      U31-18 (RR-) - S4-2 (-TW) Below 1 Ω
      U31-6 (RL+) - Body ground 10 kΩ or higher
      U31-17 (RL-) - Body ground 10 kΩ or higher
      U31-7 (RR+) - Body ground 10 kΩ or higher
      U31-18 (RR-) - Body ground 10 kΩ or higher
    Fig 21: Identifying Stereo Component Amplifier And Rear No 2 Speaker Connector Terminals
    G05299539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  34. INSPECT REAR NO. 1 SPEAKER 
    1. Disconnect the O6 and O1 speaker connectors.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 - 2 6 to 10 Ω
    Fig 22: Identifying Rear No 2 Speaker Connector Terminals
    G05266099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE REAR NO. 1 SPEAKER 

    OK: Go to next step 

  35. CHECK WIRE HARNESS (REAR NO. 2 SPEAKER - REAR NO. 1 SPEAKER) 
    1. Disconnect the O6, O1, S8 and S4 speaker connectors.
    2. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      S8-3 (+) - O6-1 Below 1 Ω
      S8-4 (-) - O6-2 Below 1 Ω
      S4-3 (+) - O1-1 Below 1 Ω
      S4-4 (-) - O1-2 Below 1 Ω
    Fig 23: Identifying Rear No 1 And Rear No 2 Speaker Connector Terminals
    G05299541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE REAR NO. 2 SPEAKER 

  36. INSPECT REAR HEADER SPEAKER 
    1. Disconnect the V21 and U17 speaker connectors.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 - 2 7 to 9 Ω
    Fig 24: Identifying Rear Header Speaker Connector Terminals
    G05266104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE REAR HEADER SPEAKER 

    OK: Go to next step 

  37. CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - REAR HEADER SPEAKER) 
    1. Disconnect the U30 amplifier connector.
    2. Disconnect the V21 and U17 speaker connectors.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U30-1 (SL+) - V21-1 Below 1 Ω
      U30-5 (SL-) - V21-2 Below 1 Ω
      U30-2 (SR+) - U17-1 Below 1 Ω
      U30-6 (SR-) - U17-2 Below 1 Ω
      U30-1 (SL+) - Body ground 10 kΩ or higher
      U30-5 (SL-) - Body ground 10 kΩ or higher
      U30-2 (SR+) - Body ground 10 kΩ or higher
      U30-6 (SR-) - Body ground 10 kΩ or higher
    Fig 25: Identifying Stereo Component Amplifier And Rear Header Speaker Connector Terminals
    G05299543Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

  38. INSPECT STEREO COMPONENT SPEAKER 
    1. Disconnect the U21 speaker connector.
    2. Measure the resistance of the speaker.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 (WF2-) - 2 (WF2+) 12.5 to 16.5 Ω
      3 (WF1-) - 4 (WF1+)
    Fig 26: Identifying Stereo Component Speaker Connector Terminals
    G05299468Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE STEREO COMPONENT SPEAKER 

    OK: Go to next step 

  39. CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - STEREO COMPONENT SPEAKER) 
    1. Disconnect the U31 amplifier connector.
    2. Disconnect the U21 speaker connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      U31-5 (WF1+) - U21-4 (WF1+) Below 1 Ω
      U31-14 (WF1-) - U21-3 (WF1-) Below 1 Ω
      U31-4 (WF2+) - U21-2 (WF2+) Below 1 Ω
      U31-13 (WF2-) - U21-1 (WF2-) Below 1 Ω
      U31-1 (WF1+) - Body ground 10 kΩ or higher
      U31-14 (WF1-) - Body ground 10 kΩ or higher
      U31-4 (WFR2+) - Body ground 10 kΩ or higher
      U31 -13 (WF2-) - Body ground 10 kΩ or higher
    Fig 27: Identifying Stereo Component Amplifier And Stereo Component Speaker Connector Terminals
    G05299483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR 0R REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE STEREO COMPONENT AMPLIFIER 

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