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Home >> Lexus >> 2006 >> IS 250 RWD, Automatic >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Seats >> Seat >> FRONT POWER SEAT CONTROL SYSTEM (w/Seat Position Memory System) >> Front Passenger Side Seat Memory Switch Circuit >> Wiring Diagram

Front Passenger Side Seat Memory Switch Circuit: Wiring Diagram

Fig 1: Wiring Diagram - Front Passenger Side Seat Memory Switch Circuit
G04051026Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. READ VALUE OF INTELLIGENT TESTER (SEAT MEMORY SWITCH RH) 
    1. Connect the intelligent tester (with CAN VIM) to the DLC3.
    2. Turn the engine switch on (IG).
    3. Read the DATA LIST.

    SEAT: 

    DATA LIST DISPLAY CHART

    Item Measurement Item/Range (Display) Normal Condition Diagnostic Note
    SEAT MEM M1 M1 switch signal / ON or OFF ON: M1 switch is ON
    OFF: M1 switch is OFF    		 -
    SEAT MEM M2 M2 switch signal / ON or OFF ON: M2 switch is ON
    OFF: M2 switch is OFF    		 -
    SEAT MEM M3 M3 switch signal / ON or OFF ON: M3 switch is ON
    OFF: M3 switch is OFF    		 -
    SEAT SET SW SET switch signal / ON or OFF ON: SET switch is ON
    OFF: SET switch is OFF    		 -

    OK: On the tester screen, each item changes between ON and OFF according to the above chart. 

    NG: Go to step 2 

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

  2. INSPECT SEAT MEMORY SWITCH RH 
    1. Remove the seat memory switch RH.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONDITION SPECIFIED CONDITION CHART

      Tester Connection Switch Position Specified Condition
      1 (MMRY) - 5 (E) SET switch is pressed Below 1 Ω
      2 (1) - 5 (E) M1 switch is pressed Below 1 Ω
      3 (2) - 5 (E) M2 switch is pressed Below 1 Ω
      4 (3) - 5 (E) M3 switch is pressed Below 1 Ω
      1 (MMRY) - 5 (E) SET switch is not pressed 10 kΩ or higher
      2 (1) - 5 (E) M1 switch is not pressed 10 kΩ or higher
      3 (2) - 5 (E) M2 switch is not pressed 10 kΩ or higher
      4 (3) - 5 (E) SET switch is not pressed 10 or higher
    Fig 2: Identifying Seat Memory Switch RH Connector Terminals
    G04051027Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE SEAT MEMORY SWITCH RH 

    OK: Go to next step. 

  3. CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH RH CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONDITION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      L7-2 (1) - L7-5 (E) 10 kΩ or higher
      L7-3 (2) - L7-5 (E) 10 kΩ or higher
      L7-4 (3) - L7-5 (E) 10 kΩ or higher
      L7-1 (MMRY) - L7-5 (E) 10 kΩ or higher
      L7-5 (E) - Body ground Below 1 Ω
    Fig 3: Identifying Seat Memory Switch RH Connector Terminals
    G04051028Courtesy 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 - SEAT MEMORY SWITCH, BODY GROUND) 
    1. Disconnect the outer mirror control ECU RH connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONDITION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      L10-22 (M1) - L7-2 (1) Below 1 Ω
      L10-23 (M2) - L7-3 (2) Below 1 Ω
      L10-24 (M3) - L7-4 (3) Below 1 Ω
      L10-25 (MM) - L7-1 (MMRY) Below 1 Ω
      L10-26 (MSWE) - L7-5 (E) Below 1 Ω
      L10-26 (MSWE) - Body ground Below 1 Ω
      L7-5 (E) - Body ground Below 1 Ω
    Fig 4: Identifying Outer Mirror Control ECU - Seat Memory Switch Connector Terminals
    G04051029Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE OUTER MIRROR CONTROL ECU RH 

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