LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2021 >> Sequoia TRD Pro >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Navigation System - Circuit & Symptom Tests >> Navigation System >> Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter [08/2017 - 08/2019] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter [08/2017 - 08/2019]: Procedure

  1. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY) 
    1. Disconnect the H158 navigation receiver assembly connector.
    2. Disconnect the H190 No. 1 stereo jack adapter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H158-25 (ADPG) - H190-9 (AUXO) Always Below 1 Ω
      H158-26 (VAR+) - H190-6 (ARO) Always Below 1 Ω
      H158-28 (VAL+) - H190-7 (ALO) Always Below 1 Ω
      H158-27 (VA-) - H190-8 (ASGN) Always Below 1 Ω
      H158-11 (AGND) - H190-10 (AGND) Always Below 1 Ω
      H158-25 (ADPG) - Body ground Always 10 kΩ or higher
      H158-26 (VAR+) - Body ground Always 10 kΩ or higher
      H158-28 (VAL+) - Body ground Always 10 kΩ or higher
      H158-27 (VA-) - Body ground Always 10 kΩ or higher
      H158-11 (AGND) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [08/2017 - 08/2019] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR