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Home >> Toyota >> 2012 >> Highlander Limited, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio Entertainment System (Diagnostic Codes & Symptom Tests) (Except Hybrid) >> Audio And Visual System >> Circuit Tests >> Multi-media Interface ECU Power Source Circuit >> Procedure

Multi-media Interface ECU Power Source Circuit: Procedure

  1. INSPECT MULTI-MEDIA INTERFACE ECU 
    1. Disconnect the multi-media interface ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      E30-12 (+B) - E30-7 (GND) Always 11 to 14 V
      E30-11 (ACC) - E30-7 (GND) Ignition switch ACC 11 to 14 V

    NG → See step   3 

    OK → See step   4 

  2. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
  3. CHECK HARNESS AND CONNECTOR 
    1. Disconnect the radio receiver assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E30-11 (ACC) - E16-11 (ACC) Always Below 1 Ω
      E30-12 (+B) - E16-12 (+B) Always Below 1 Ω
      E30-7 (GND) - E16-7 (GND) Always Below 1 Ω
      E30-11 (ACC) - Body ground Always 10 kΩ or higher
      E30-12 (+B) - Body ground Always 10 kΩ or higher
      E30-7 (GND) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   2 

  4. REPLACE MULTI-MEDIA INTERFACE ECU. Refer to  REMOVAL