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Home › Lexus › 2007 › 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 OF INTELLIGENT TESTER 
    1. Connect the intelligent tester (with CAN VIM) to the DLC3.
    2. Turn the ignition switch on.
    3. Read the DATA LIST.

      D_SEAT (Position control ECU and switch assembly) 

      MEASUREMENT ITEM/RANGE CHART

      Item Measurement Item/Range (Display) Normal Condition Diagnostic Note
      M2 SW Seat memory M2 switch signal/ ON or OFF ON: Seat memory M2 switch is ON
      OFF: Seat memory M2 switch is OFF      		 -
      M1 SW Seat memory M1 switch signal/ ON or OFF ON: Seat memory M1 switch is ON
      OFF: Seat memory M1 switch is OFF      		 -
      SET SW 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 

      TESTER CONNECTION AND SPECIFIED CONDITION

      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

    NG: REPLACE SEAT MEMORY SWITCH (DRIVING POSITION MEMORY SWITCH) 

    Fig 1: Identifying Seat Memory Switch Terminals
    G05281312Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 

      TESTER CONNECTION AND SPECIFIED CONDITION

      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: GO TO step   4 

    Fig 2: Identifying Seat Memory Switch Terminals
    G05281313Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 

      TESTER CONNECTION AND SPECIFIED CONDITION

      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 

    Fig 3: Identifying Power Window Regulator Switch Connector And Seat Memory Switch Connector
    G05281314Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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