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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 626 (NAVIGATION SYSTEM - DIAGNOSTICS)MUTE SIGNAL CIRCUITINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT STEREO COMPONENT AMPLIFIER ASSY 
    1. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TERMINALS VOLTAGE

      Tester connection Condition Specification
      MUTE - Body ground Turn ignition switch to ACC, Audio system is playing --> Changing Above 3.5 V --> Below 1 V
      Fig 1: Identifying Stereo Component Amplifier Assy Connector
      G02895078Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step 2 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (see  PROBLEM SYMPTOMS TABLE  ) 
  2. CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSY - STEREO COMPONENT AMPLIFIER ASSY) 
    1. Disconnect the connectors from the radio and navigation assy R4 and stereo component amplifier assy S13.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TERMINALS RESISTANCE

      Tester connection Condition Specification
      MUTE (R4) - MUTE (S13) Always Below 1 Ω
      MUTE (R4 or S13) - Body ground Always 10 kΩ or higher
      Fig 2: Disconnecting Connectors From Radio And Navigation Assy R4
      G02895079Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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