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Home >> Toyota >> 2009 >> Sienna CE >> Repair and Diagnosis (Single Page) >> Body & Frame >> Seats >> Front Power Seat Control System >> Driving Position Memory Switch Circuit (w/ Memory) >> Inspection Procedure
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Inspection Procedure

  1. READ VALUE OF TECHSTREAM 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch on.
    3. Read the DATA LIST.

      D_SEAT (Position control ECU and switch assembly) 

      DATA LIST

      Tester Display Measurement Item/Range Normal Condition
      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.

      Standard resistance 

      TESTER CONNECTION 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
      Fig 1: Identifying Seat Memory Switch
      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.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Switch Position Specified Condition
      S33-2 (MMRY) - S33-1 (E) Ignition switch on 10 to 14 V
      S33-3 (2) - S33-1 (E) Ignition switch on 10 to 14 V
      S33-4 (1) - S33-1 (E) Ignition switch on 10 to 14 V
      2. Fig 2: Identifying S33 Connector Terminals
      G05141807Courtesy 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 (OUTER MIRROR CONTROL ECU LH - SEAT MEMORY SWITCH) 
    1. Disconnect outer mirror control ECU LH connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Switch Position Specified Condition
      S33-1 (E) - Body ground Always Below 1 Ω
      S33-2 (MMRY) - O9-25 (MM) Always Below 1 Ω
      S33-3 (2) - O9-23 (M2) Always Below 1 Ω
      S33-4 (1) - O9-22 (M1) Always Below 1 Ω
      S33-2 (MMRY) - Body ground Always 10 kΩ or higher
      S33-3 (2) - Body ground Always 10 kΩ or higher
      S33-4 (1) - Body ground Always 10 kΩ or higher
      3. Fig 3: Checking Harness And Connector (Outer Mirror Control ECU LH - Seat Memory Switch)
      G05141808Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE OUTER MIRROR CONTROL ECU LH 

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