LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2019 >> IS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio / Video System - Circuit Tests >> Audio And Visual System >> Steering Pad Switch Circuit [09/2020 - ] >> Procedure

Steering Pad Switch Circuit [09/2020 - ]: Procedure

  1. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Remove the steering pad switch assembly.

      Refer to REMOVAL [10/2016 - ]

    2. Inspect the steering pad switch assembly.

      Refer to INSPECTION [09/2020 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  REMOVAL [10/2016 - ] 

    Result: 

    OK 

    See step  2

  2. INSPECT SPIRAL CABLE SUB-ASSEMBLY 
    1. Remove the spiral cable sub-assembly.

      Refer to REMOVAL [10/2016 - ]

    2. Inspect the spiral cable sub-assembly.

      Refer to INSPECTION [10/2016 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  REMOVAL [10/2016 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY, BODY GROUND) 
    1. Disconnect the K172 radio receiver assembly connector.
    2. Disconnect the K26 spiral cable sub-assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K172-21 (SW1) - K26-6 (AU1) Always Below 1 Ω
      K172-22 (SW2) - K26-5 (AU2) Always Below 1 Ω
      K172-24 (SWG) - K26-3 (EAU) Always Below 1 Ω
      K172-21 (SW1) or K26-6 (AU1) - Body ground Always 10 kΩ or higher
      K172-22 (SW2) or K26-5 (AU2) - Body ground Always 10 kΩ or higher
      K172-24 (SWG) or K26-3 (EAU) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2020 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR