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Home >> Lexus >> 2012 >> LS 460 AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Interior/Exterior Trim >> Rear Sunshade (Diagnostic Codes & Symptom Tests) >> Rear Sunshade System >> Symptom Tests >> Front and Rear Switch Cannot Operate Rear Sunshade >> Procedure

Front and Rear Switch Cannot Operate Rear Sunshade: Procedure

  1. CHECK FOR DTC 
    1. Clear the DTCs. Refer to DTC CHECK/CLEAR .
    2. Check for DTCs. Refer to DTC CHECK/CLEAR .
      RESULT

      Result Proceed to
      DTC is not output A
      DTC U0141, U0210, U1114 is output B
      DTC U1127 is output C

    B → See step   9 

    C → See step   10 

    A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM (BODY NO. 4) 
    1. Select the Active Test, use the Techstream to generate a control command, and then check that the shade raises/lowers. Refer to DATA LIST/ACTIVE TEST .
      BODY NO. 4

      Tester Display Test Part Control Range Diagnostic Note
      Rear Sunshade Operation Rear Sunshade Operation Down, No or Up -

      OK

      Rear sunshade raises or lowers.

    NG → See step   5 

    OK: Go to next step 

  3. READ VALUE USING TECHSTREAM (BODY NO. 4) 
    1. Use the Data List to check if the rear sunshade limit switch is functioning properly. Refer to DATA LIST/ACTIVE TEST .
      BODY NO. 4

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Rear Sunshade Close Status of the rear sunshade close/YES or NO YES: Rear sunshade limit switch is OFF (Rear sunshade is lowered)
      NO: Rear sunshade limit switch is ON (Rear sunshade is raised)
      -

      OK

      Rear sunshade raises or lowers.

    OK → See step   5 

    NG: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (REAR WINDOW SHADE - REAR JUNCTION BLOCK ECU AND BODY GROUND) 
    Fig 1: Disconnecting S25 Shade & S61 ECU Connector
    GTY265399Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S25 shade connector.
    2. Disconnect the S61 ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      S25-3 (RSL) - S61-22 (LMT) Always Below 1 Ω
      S25-3 (RSL) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   13 

  5. INSPECT FUSE (RR S/SHADE) 
    1. Remove the RR S/SHADE fuse from luggage room junction block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      RR S/SHADE fuse Always Below 1 Ω

    NG → REPLACE FUSE 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (REAR JUNCTION BLOCK ECU - BODY GROUND) 
    Fig 2: Disconnecting LG Junction Block Connector
    GTY278368Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the LG junction block connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      LG-1 - Body ground Always 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  7. CHECK HARNESS AND CONNECTOR (REAR WINDOW SHADE - REAR JUNCTION BLOCK ECU AND BODY GROUND) 
    Fig 3: Disconnect S25 Shade & S61 ECU Connectors
    GTY265401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S25 shade connector.
    2. Disconnect the S61 ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      S25-2 (RSMU) - S61-4 (MU) Always Below 1 Ω
      S25-1 (RSMD) - S61-3 (MD) Always Below 1 Ω
      S25-4 (RSE) - Body ground Always Below 1 Ω
      S25-2 (RSMU) - Body ground Always 10 kΩ or higher
      S25-1 (RSMD) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  8. INSPECT REAR WINDOW SHADE ASSEMBLY 
    1. Remove the rear window shade assembly. Refer to REMOVAL .
      Fig 4: Identifying Rear Window Shade Assembly
      GTY257677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage and check the operation of the window shade motor.
      STANDARD

      Measurement Condition Specified Condition
      Battery positive (+) → 1 (RSMD)
      Battery negative (-) → 4 (RSE)
      Sunshade lowers
      Battery positive (+) → 2 (RSMU)
      Battery negative (-) → 4 (RSE)
      Sunshade raises

    NG → See step   12 

    OK → See step   11 

  9. GO TO CAN COMMUNICATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE TABLE 
  10. GO TO LIN COMMUNICATION SYSTEM. Refer to  DTC U1127: Lost Communication with Center Console Switch ECU 
  11. REPLACE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL 
  12. REPLACE REAR WINDOW SHADE ASSEMBLY. Refer to  REMOVAL 
  13. REPLACE REAR WINDOW SHADE ASSEMBLY. Refer to  REMOVAL