LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2005 >> LX 470 >> Repair and Diagnosis >> Body & Frame >> Seats >> Seat Heater System >> Inspection

Seat Heater System: Inspection

  1. INSPECT SEAT HEATER SWITCH CONTINUITY 
    SWITCH POSITION SPECIFIED CONDITION

    Switch position Tester connection Specified condition
    HI 3 - 4; 5 - 6 Continuity
    OFF - No continuity
    LO 4 - 5 Continuity
    Illumination circuit 1 - 2 Continuity

    If the continuity is not as specified, replace the switch.

    Fig 1: Identifying Seat Heater Switch & Connector Terminals
    G02994110Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT SEAT HEATER INDICATOR LIGHT OPERATION 
    1. Connect the battery positive (+) lead to terminal 6 and the battery negative (-) lead to terminal 4.
    2. Push the seat heater switch Right or Left side and check that the indicator light comes on.

    If the operation is not as specified, replace the switch and inspect the circuits connected to other parts.

    Fig 2: Inspecting Seat Heater Indicator Light Operation
    G02994111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT SEAT HEATER CUSHION CONTINUITY 

    Inspect the seat heater assy between terminals, as shown.

    Fig 3: Identifying Seat Heater Cushion Connector Terminals
    G02994112Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFIED CONDITION

    Tester connection Condition Specified condition
    1 - 4 Always Continuity
    2 - 3 Always Continuity

    If the continuity is not as specified, replace the seat heater assy.

  4. INSPECT SEAT BACK CONTINUITY 

    Inspect the seat heater assy between terminals, as shown.

    Fig 4: Identifying Seat Back Connector Terminals
    G02994113Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFIED CONDITION

    Tester connection Condition Specified condition
    1 - 2 - 3 Always Continuity

    If the continuity is not as specified, replace the seat heater assy.

  5. INSPECT SEAT CUSHION AND SEAT BACK OPERATION 
    1. Heat the thermostat with a light.
    2. Connect the seat cushion and the seat back connector.
    3. Inspect the seat heater assy continuity between terminals, as shown.
    Fig 5: Inspecting Seat Cushion And Seat Back Operation
    G02994114Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFIED CONDITION

    Tester connection Condition Specified condition
    1 <--> 4,2 <--> 3 25 - 35 °C (77 - 95 °F) Continuity
    1 <--> 4 35 - 45 °C (77 - 95 °F) Continuity
    2 <--> 3 35 - 45 °C (77 - 95 °F) No continuity

    If the continuity is not as specified, replace the seat heater assy.

  6. INSPECT SEAT HEATER ASSY (SEAT BACK) OPERATION 
    1. Heat the thermostat with a light.
    2. Connect the seat cushion and the seat back connector.
    3. Inspect the seat heater assy continuity between terminals, as shown.
    Fig 6: Inspecting Seat Heater Assy (Seat Back) Operation
    G02994115Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFIED CONDITION

    Tester connection Condition Specified condition
    1 - 2 - 3 25 - 35 °C (77 - 95 °F) Continuity
    1 - 2 35 - 45 °C(77 - 95 °F) Continuity
    1 - 3, 2 - 3 35 - 45 °C (77 - 95 °F) No continuity
scientia non olet · About LEMON Manuals