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Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSY - STEREO COMPONENT AMPLIFIER ASSY) 
    1. Disconnect the radio and navigation assy connector R13 and stereo component amplifier assy connector S11.
    2. Measure the resistance according to the value(s) in RADIO AND NAVIGATION ASSY - (STEREO COMPONENT AMPLIFIER ASSY) RESISTANCE .

      Standard: 

    RADIO AND NAVIGATION ASSY - (STEREO COMPONENT AMPLIFIER ASSY) RESISTANCE

    Tester connection Condition Specified condition
    IVO+ - INT+ Always Below 1 Ω
    IVO- - INT- Always Below 1 Ω
    IVO+ - Body ground Always 10 kΩ or higher
    IVO- - Body ground Always 10 kΩ or higher
    Fig 1: Disconnecting Radio & Navigation Assy Connector R13
    G02630320Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Disconnecting Stereo Component Assy Connector S11
    G02630321Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  2. INSPECT FRONT NO. 1 SPEAKER ASSY (LEFT SIDE) 
    1. Disconnect the speaker connector F17.
    2. Resistance check.
      1. Measure the resistance between the terminals of the speaker.
    NOTE: The speaker should not be removed for checking.

    Standard: 4 to 6 Ω 

    1. NG: REPLACE  FRONT NO. 1 SPEAKER ASSY 
    2. OK: GO TO NEXT STEP 
  3. CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSY - FRONT NO. 2 SPEAKER ASSY) 
    1. Disconnect the front No. 2 speaker assy connector T8.
    2. Measure the resistance according to the value(s) in FRONT NO. 1 SPEAKER ASSY - FRONT NO. 2 SPEAKER ASSY RESISTANCE .

      Standard: 

    FRONT NO. 1 SPEAKER ASSY - FRONT NO. 2 SPEAKER ASSY RESISTANCE

    Tester connection Condition Specified condition
    T8-3 - F17-1 Always Below 1 Ω
    T8-4 - F17-2 Always Below 1 Ω
    T8-4 - Body ground Always 10 kΩ or higher
    T8-3 - Body ground Always 10 kΩ or higher
    Fig 3: Front No. 2 Speaker Assy T8 Connector Front View
    G02630322Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Front No. 1 Speaker Assy F17 Connector Front View
    G02630323Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 
  4. INSPECT FRONT NO. 2 SPEAKER ASSY 
    1. Inspect by changing the right one with the left one, and vice versa

      OK: Malfunction disappears. 

    HINT:

    Connect all connectors of the speakers.

    1. OK: REPLACE  FRONT NO. 2 SPEAKER ASSY 
    2. NG: GO TO NEXT STEP 
  5. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSY-FRONT NO. 2 SPEAKER ASSY) 
    1. Disconnect the stereo component amplifier assy connector S10 and front No. 2 speaker assy connector T8.
    2. Measure the resistance according to the value(s) in STEREO COMPONENT AMPLIFIER ASSY-FRONT NO. 2 SPEAKER ASSY RESISTANCE .

      Standard: 

    STEREO COMPONENT AMPLIFIER ASSY-FRONT NO. 2 SPEAKER ASSY RESISTANCE

    Tester connection Condition Specified condition
    FL+ - T8-1 Always Below 1 Ω
    FL- - T8-2 Always Below 1 Ω
    FL+-Body ground Always 10 kΩ or higher
    FL--Body ground Always 10 kΩ or higher
    Fig 5: Disconnecting Stereo Component Amplifier Assy Connector S10
    G02630324Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 6: Front No. 2 Speaker Assy T8 Connector Front View
    G02630325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
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