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Home >> Lexus >> 2010 >> IS 250C Standard >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Retractable Hardtop (Diagnostic Codes (B2536-B256E) & Circuit Tests) >> Retractable Hardtop System >> DTC B256D: Lock in Quarter Window Motor RH Circuit >> Procedure

DTC B256D: Lock in Quarter Window Motor RH Circuit: Procedure

  1. INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH 
    1. Remove the power window regulator motor assembly RH.
      Fig 1: Identifying Power Window Regulator Motor Assembly RH
      GTY264334Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Apply battery voltage and check operation of the power window regulator motor.

      OK

      Measurement Condition Specified Condition
      Battery positive (+) → 1 (D)
      Battery negative (-) → 2 (U)
      Motor gear rotates counterclockwise
      Battery positive (+) → 2 (U)
      Battery negative (-) → 1 (D)
      Motor gear rotates clockwise
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Power Window Regulator Motor Assembly RH)
      *2 Motor Gear
      *3 Clockwise
      *4 Counterclockwise

    NG → REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY RH 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR RH - SLIDING ROOF CONTROL ECU) 
    1. Disconnect the P44 and P54 connectors.
      Fig 2: Identifying P44 & P54 Connectors
      GTY258187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P54-12 (QWR+) - P54-11 (QWR-) Always 10 kΩ or higher
      P54-12 (QWR+) - Body ground Always 10 kΩ or higher
      P54-11 (QWR-) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Sliding Roof Control ECU Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE SLIDING ROOF CONTROL ECU ASSEMBLY