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Home >> Lexus >> 2009 >> LS 460L AWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication >> Can Communication System >> DTC U0210 Lost Communication with "Seat Control Module C" >> Inspection Procedure

Inspection Procedure

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
      CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
      NOTE:
      • After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected (see INITIALIZATION ).
  2. CHECK FOR OPEN IN CAN BUS WIRE (REAR POWER SEAT MODULE SWITCH BRANCH WIRE) 
    1. Disconnect the r2 and S15 rear power seat module switch connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      w/o Ottoman 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      r2-1 (CANP) - r2-2 (CANN) Engine switch off 54 to 69 Ω

      w/ Ottoman 

      SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      S15-1 (CANP) - S15-2 (CANN) Engine switch off 54 to 69 Ω
      Fig 1: Identifying R2 And S15 Rear Power Seat Module Switch Connector Terminals
      G06198526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE REAR POWER SEAT MODULE SWITCH BRANCH WIRE OR CONNECTOR (CANP, CANN) 

      OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT MODULE SWITCH - BATTERY AND BODY GROUND) 
    1. Connect the cable to the negative (-) battery terminal.
      NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (see INITIALIZATION ).
    2. Disconnect the r2 or S15 rear power seat module switch connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      w/o Ottoman 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      r2-3 (E) - Body ground Always Below 1 Ω

      w/ Ottoman 

      SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      S15-5 (E) - Body ground Always Below 1 Ω
    4. Measure the voltage according to the value(s) in the table below.
      Fig 2: Identifying R2 Or S15 Rear Power Seat Module Switch Connector Terminals
      G06198527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      w/o Ottoman 

      SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      r2-11 (B) - Body ground Always 11 to 14 V

      w/ Ottoman 

      SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      S15-6 (B) - Body ground Always 11 to 14 V

      Result 

      RESULT REFERENCE

      Result Proceed to
      OK (w/ Ottoman) A
      OK (w/o Ottoman) B
      NG C

      B: REPLACE REAR POWER SEAT MODULE SWITCH  (See REMOVAL )

      C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      A: REPLACE REAR POWER SEAT MODULE SWITCH  (See REMOVAL )

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