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Home >> Lexus >> 2012 >> IS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio Entertainment System (W/O Navigation & Multi-Display) (Diagnostic Codes & Symptom Tests) >> AUDIO AND VISUAL SYSTEM (w/o Navigation System without Multi-display) >> Circuit Tests >> Sound Signal Circuit between Radio Receiver and Multi-media Interface ECU >> Procedure

Sound Signal Circuit between Radio Receiver and Multi-media Interface ECU: Procedure

  1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-MEDIA INTERFACE ECU) 
    1. Disconnect the radio receiver assembly and multi-media interface ECU connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J111-1 (USD1) - J110-1 (CSLD) Always Below 1 Ω
      J111-2 (URO+) - J110-2 (CDR+) Always Below 1 Ω
      J111-3 (URO-) - J110-3 (CDR-) Always Below 1 Ω
      J111-4 (ULO+) - J110-4 (CDL+) Always Below 1 Ω
      J111-5 (ULO-) - J110-5 (CDL-) Always Below 1 Ω
      J111-1 (USD1) - Body ground Always 10 kΩ or higher
      J111-2 (URO+) - Body ground Always 10 kΩ or higher
      J111-3 (URO-) - Body ground Always 10 kΩ or higher
      J111-4 (ULO+) - Body ground Always 10 kΩ or higher
      J111-5 (ULO-) - 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