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Home >> Lexus >> 2009 >> RX 350 AWD >> Repair and Diagnosis >> Body & Frame >> Seats >> Front Power Seat Control System (Diagnostics) >> FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) >> Memory Switch Circuit >> Procedure
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Memory Switch Circuit: Procedure

  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch on.
    3. Read the Data List.
      DRIVER SEAT

      Tester Display Measurement Item / Range Normal Condition
      M2 Switch M2 switch signal / ON or OFF ON: M2 switch is ON
      OFF: M2 switch is OFF
      M1 Switch M1 switch signal / ON or OFF ON: M1 switch is ON
      OFF: M1 switch is OFF
      SET Switch SET switch signal / ON or OFF ON: SET switch is ON
      OFF: SET switch is OFF

      OK

      Condition status can be displayed.

    NG → See step   2 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

  2. INSPECT SEAT MEMORY SWITCH (DRIVING POSITION MEMORY SWITCH) 
    1. Remove the seat memory switch.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying Seat Memory Switch & Connector Terminals
      GTY120349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Switch Position Specified Condition
      D15-1 (E) - D15-2 (MMRY) SET switch ON (pushed) Below 1 Ω
      D15-1 (E) - D15-2 (MMRY) SET switch OFF (not pushed) 10 kΩ or higher
      D15-1 (E) - D15-4 (1) SW1 switch ON (pushed) Below 1 Ω
      D15-1 (E) - D15-4 (1) SW1 switch OFF (not pushed) 10 kΩ or higher
      D15-1 (E) - D15-3 (2) SW2 switch ON (pushed) Below 1 Ω
      D15-1 (E) - D15-3 (2) SW2 switch OFF (not pushed) 10 kΩ or higher

    NG → REPLACE SEAT MEMORY SWITCH 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH CIRCUIT) 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 2: Identifying Seat Memory Switch Connector & Harness
      GTY119641Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Switch Position Specified Condition
      D15-2 (MMRY) - D15-1 (E) Ignition switch on 10 to 14 V
      D15-3 (2) - D15-1 (E) Ignition switch on 10 to 14 V
      D15-4 (1) - D15-1 (E) Ignition switch on 10 to 14 V

    NG → See step   4 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

  4. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - SEAT MEMORY SWITCH) 
    1. Disconnect the power window regulator switch assembly connector.
      Fig 3: Identifying Power Window Regulator Switch Assembly & Seat Memory Switch
      GTY119640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Switch Position Specified Condition
      D15-1 (E) - Body ground Always Below 1 Ω
      D15-2 (MMRY) - P22-3 (MM) Always Below 1 Ω
      D15-3 (2) - P22-17 (M2) Always Below 1 Ω
      D15-4 (1) - P22-13 (M1) Always Below 1 Ω
      D15-2 (MMRY) - Body ground Always 10 kΩ or higher
      D15-3 (2) - Body ground Always 10 kΩ or higher
      D15-4 (1) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY 

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