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Home >> Lexus >> 2015 >> LS 600h >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Exterior Trim >> Rear Sunshade (Diagnostic Codes & Symptom Tests) >> Rear Sunshade System >> Symptom Tests >> Only Front Switch Cannot Operate Rear Sunshade [10/2014 - ] >> Procedure

Only Front Switch Cannot Operate Rear Sunshade [10/2014 - ]: Procedure

  1. CHECK FOR DTC 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR [10/2014 - ] .
    2. Check for DTCs. Refer to DTC CHECK / CLEAR [10/2014 - ] .
      RESULT

      Result Proceed to
      No DTC is output A
      DTC U1114 is output B
      DTC U1127 is output C

    B → See step   5 

    C → See step   6 

    A: Go to next step 

  2. READ VALUE USING TECHSTREAM (CENTER CONSOLE SWITCH) 
    1. Use the Data List to check if the rear sunshade switch is functioning properly. Refer to DATA LIST / ACTIVE TEST [10/2014 - ] .
      CENTER CONSOLE SWITCH

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Rear Shade Switch Rear sunshade switch / ON or OFF ON: Rear sunshade switch pressed
      OFF: Rear sunshade switch not pressed
      -

      OK

      On the Techstream screen, item changes between ON and OFF according to above chart.

    NG → See step   4 

    OK: Go to next step 

  3. CHECK COMBINATION SWITCH ASSEMBLY 
    1. Temporarily replace the combination switch assembly with a new one or normally functioning one. Refer to REMOVAL [10/2014 - ] .
    2. Check the rear sunshade system operate normally. Refer to OPERATION CHECK [10/2014 - ] .

      OK

      Rear sunshade raises or lowers.

    NG → See step   9 

    OK → END (COMBINATION SWITCH ASSEMBLY IS DEFECTIVE) 

  4. INSPECT INTEGRATION CONTROL AND PANEL ASSEMBLY 
    1. Remove the integration control and panel assembly. Refer to REMOVAL [10/2014 - ] .
      GTY398339Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      z75-3 - z75-9 Rear sunshade switch is pushed Below 200 Ω
      z75-3 - z75-9 Rear sunshade switch is not pushed 10 kΩ or higher

    NG → See step   7 

    OK → See step   8 

  5. GO TO CAN COMMUNICATION SYSTEM. Refer to  DTC U1114: Lost Communication with Main Switch Module [10/2014 - ] 
  6. GO TO LIN COMMUNICATION SYSTEM. Refer to  DTC U1127: Lost Communication with Center Console Switch ECU [10/2014 - ] 
  7. REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY. Refer to  REMOVAL [10/2014 - ] 
  8. REPLACE COMBINATION SWITCH ASSEMBLY. Refer to  REMOVAL [10/2014 - ] 
  9. REPLACE OUTER MIRROR SWITCH ASSEMBLY. Refer to  REMOVAL [10/2014 - ]