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Home >> Lexus >> 2003 >> SC 430 >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System - Diagnosis >> DTC B1221 Power Window Switch Circuit On Driver Door >> Inspection Procedure
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Inspection Procedure

  1. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    1. Remove the power window master switch.
    2. Check the continuity between the terminals when the power window switch for driver door is operated.

      Standard: 

      Fig 1: Checking Power Window Regulator Master Switch Assembly
      G03370788Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      CONTINUITY CONDITIONS REFERENCE

      Switch position Terminal No. Specified condition
      Auto-up 6 <--> 20 <--> 16 Continuity
      Manual-up 6 <--> 20 Continuity
      Off - No continuity
      Manual-down 6 <--> 11 Continuity
      Auto-down 6 <--> 11 <--> 16 Continuity
    3. Check the continuity between the terminals when the door control switch is operated.

      Standard: 

      CONTINUITY CONDITIONS REFERENCE

      Switch position Terminal No. Specified condition
      Lock 8 <--> 10 Continuity
      Off - No continuity
      Unlock 18 <--> 10 Continuity
    1. NG: REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSY 
    2. OK: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH 
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