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Home › Lexus › 2008 › RX 400h AWD › Repair and Diagnosis › Body & Frame › Seats › Seat › Front Power Seat Control System › Driving Position Memory Switch Circuit (w/ Memory) › Inspection Procedure

Inspection Procedure

  1. READ VALUE USING TECHSTREAM 
    1. Connect Techstream (with CAN VIM) to the DLC3.
    2. Turn the ignition switch on.
    3. Read the Data List.

      Driver Seat 

      TESTER DISPLAY REFERENCE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      M2 Switch Seat memory M2 switch signal/ ON or OFF ON: Seat memory M2 switch is ON
      OFF: Seat memory M2 switch is OFF      		 -
      M1 Switch Seat memory M1 switch signal/ ON or OFF ON: Seat memory M1 switch is ON
      OFF: Seat memory M1 switch is OFF      		 -
      SET Switch Seat memory set switch signal/ ON or OFF ON: Seat memory set switch is ON
      OFF: Seat memory set switch is OFF      		 -

      OK: Condition status can be displayed. 

    NG: Go to 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.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Switch Position Specified Condition
      1 (E) - 2 (MMRY) SET switch ON (pushed) Below 1 Ω
      1 (E) - 2 (MMRY) SET switch OFF (not pushed) 10 kΩ or higher
      1 (E) - 4 (1) SW1 switch ON (pushed) Below 1 Ω
      1 (E) - 4 (1) SW1 switch OFF (not pushed) 10 kΩ or higher
      1 (E) - 3 (2) SW2 switch ON (pushed) Below 1 Ω
      1 (E) - 3 (2) SW2 switch OFF (not pushed) 10 kΩ or higher
      Fig 1: Identifying Seat Memory Switch Connector
      G05141806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE SEAT MEMORY SWITCH (DRIVING POSITION 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.

      Voltage 

      VOLTAGE SPECIFICATION

      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
      2. Fig 2: Identifying D15 Seat Memory Switch Connector
      G05281313Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to 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.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      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
      3. Fig 3: Identifying P22 Power Window Regulator Switch Assembly And D15 Seat Memory Switch Connectors
      G05281314Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY (POWER WINDOW MASTER SWITCH) 

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