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Home › Lexus › 2009 › LS 460 AWD › Repair and Diagnosis › Accessories & Equipment › Communication Devices › Multiplex Communication › Lin Communication System › Seat Vibration System LIN Communication Malfunction › Inspection Procedure

Inspection Procedure

  1. CHECK BLINKING CONDITION OF LED7 
    1. 5 seconds after the seat vibrator switch SW1 is pressed, check if LED7 blinks (see SYSTEM DIAGRAM ).

      OK: 

      LED7 blinds. 

      NG:  Go to step  3

      OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (SEAT VIBRATOR MODULE - BATTERY AND BODY GROUND) 
    1. Disconnect the S29 seat vibrator module connector.
    2. Measure the voltage and resistance according to the values in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      S29-1 IG) - Body ground Engine switch on (IG) 11 to 14 V

      Standard resistance 

      SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      S29-8 (GND) - Body ground Always Below 1 Ω
      Fig 1: Identifying Terminals Of S29 Seat Vibrator Module Connector
      G04952700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE SEAT VIBRATOR MODULE ASSEMBLY  (See REMOVAL )

  3. CHECK BLINKING CONDITION OF LED6 
    1. 5 seconds after the seat vibrator switch SW1 is pressed, check if LED6 blinks (see SYSTEM DIAGRAM ).

      OK: 

      LED6 blinks. 

      NG:  Go to SEAT VIBRATION SYSTEM

      OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (SEAT VIBRATOR SWITCH - BATTERY AND BODY GROUND) 
    1. Disconnect the Y2 switch connector.
    2. Measure the voltage and resistance according to the values in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      Y2-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V

      Standard resistance 

      SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      Y2-5 (GND) - Body ground Always Below 1 Ω
      Fig 2: Identifying Y2 Switch Connector Terminal
      G04952701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  5. CHECK AND REPLACE HARNESS AND CONNECTOR (SEAT VIBRATOR SWITCH - SEAT VIBRATOR MODULE) 
    1. Disconnect the S29 seat vibrator module connector.
    2. Disconnect the Y2 switch connector.
    3. Measure the resistance according to the values in the table below.

      Standard resistance 

      Result: 

      SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      Y2-3 (MPX) - S29-3 (LIN) Always Below 1 Ω
      Fig 3: Identifying S29 Seat Vibrator Module Connector Terminal And Y2 Switch Connector Terminal
      G04952702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  6. CHECK SEAT VIBRATOR SWITCH (OPERATION) 
    1. Replace the seat vibrator switch with a new or normally operating one. Perform an operation inspection.

      OK: 

      Seat vibrator operates normally. 

      NG: REPLACE SEAT VIBRATOR MODULE ASSEMBLY  (See REMOVAL )

      OK: END (SEAT VIBRATOR SWITCH IS DEFECTIVE) 

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