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HOMESERVICE MANUALSLEXUS2007ES 350REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINFOTAINMENTNAVIGATIONNAVIGATION SYSTEMMICROPHONE CIRCUIT BETWEEN OVERHEAD JUNCTION BLOCK AND MULTI-DISPLAYINSPECTION PROCEDURE
2007 Lexus ES 350

Inspection Procedure

2007 Lexus ES 350SECTION Inspection Procedure
  1. CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - MULTI-DISPLAY) 
    1. Disconnect the overhead J/B connector Q2 and multi-display connector E63.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      ACC - MACC Always Below 1 Ω
      MI1+ - MIN+ Always Below 1 Ω
      MIC- - MIN- Always Below 1 Ω
      TSW- - SGND Always Below 1 Ω
      ACC - Body ground Always 10 kΩ or higher
      MI1+ - Body ground Always 10 kΩ or higher
      MIC- - Body ground Always 10 kΩ or higher
    Fig 1: Identifying Overhead J/B Connector Q2 And Multi-Display Connector E63
    G05253327Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  2. INSPECT MULTI-DISPLAY 
    1. Reconnect the multi-display connector E63.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      MACC - Body ground Engine switch on (ACC) 4 to 6V
    Fig 2: Identifying Multi-Display Connector E63
    G05253328Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE MULTI-DISPLAY 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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

  • • You smell fuel, burning insulation, or see smoke.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.