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Home >> Lexus >> 2014 >> ES 300h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio / Video System (W/ Multi-Display) (Diagnostic Codes & Symptom Tests) >> Audio And Visual System (W/ Multi-Display Without Parking Assist Monitor System) >> Circuit Tests >> Voice Guidance Circuit between Radio Receiver and Stereo Component Amplifier [08/2013 - ] >> Procedure

Voice Guidance Circuit between Radio Receiver and Stereo Component Amplifier [08/2013 - ]: Procedure

  1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY) 
    1. Disconnect the H90 radio receiver assembly connector.
    2. Disconnect the H87 stereo component amplifier assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester connection Condition Specified condition
      H90-16 (IVO+) - H87-15 (II1+) Always Below 1 Ω
      H90-17 (IVO-) - H87-14 (II1-) Always Below 1 Ω
      H90-14 (SLD1) - Body ground Always 10 kΩ or higher
      H90-16 (IVO+) - Body ground Always 10 kΩ or higher
      H90-17 (IVO-) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   2 

  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2013 - ]