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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 445 (CLIMATE CONTROL SEAT SYSTEM)INSPECTION
2004 Toyota Celica GT, Standard

Section 445 (Climate Control Seat System): Inspection

2004 Toyota Celica GT, StandardSECTION Inspection
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT CLIMATE CONTROL SWITCH INDICATOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 14 and negative (-) lead to terminal 6.
    2. Check that the indicator lights up when climate controls witch is turned ON.

      If climate indicator does not light up, replace climate control switch.

      Fig 1: Inspecting Climate Control Switch Indicator Operation
      G03377104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT CLIMATE CONTROL SWITCH OPERATION 
    1. (): Front passenger side:

      Measure resistance between terminals 1 (15) and 13 (17) is approx. 5.0 kΩ

    2. (): Front passenger side:

      Measure resistance between terminals 12 (16) and 13 (17) at switch each position as shown in the chart.

      RESISTANCE SPECIFICATIONS

      Switch position Resistance
      Max. COOL 0 kΩ
      Max. WARM 5 kΩ

      If resistance is not as specified, replace the climate control switch.

  3. INSPECT CLIMATE CONTROL SWITCH CIRCUIT 

    Disconnect the connector from the climate control switch and inspect the connector on the wire harness side, as shown in the chart below.

    Fig 2: Identifying Climate Control Switch Connector Terminals
    G03377105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONNECTOR TERMINALS SPECIFIED CONDITION

    Tester connection Condition Specified condition
    6 - Ground Constant Continuity
    14 - Ground Turn ignition switch ON Battery positive voltage
    14 - Ground Turn ignition switch LOCK or ACC No voltage

    If the circuit is not as specified, replace the wire harness.

  4. INSPECT THERMISTOR RESISTANCE 

    (): Seat cushion side:

    Measure resistance between terminals 2 (1)and 3 (2) of climate controller at each temperature, as shown in the chart.

    RESISTANCE SPECIFICATIONS

    Temperature °C (°F) Resistance kΩ
    10 °C (50°F) Approx. 3.7 kΩ
    25 °C (77°F) Approx. 2 Ω
    30 °C (86°F) Approx. 1.7 kΩ

    HINT:

    As the temperature increase, the resistance decreases. If the resistance is not as specified, replace the climate controller

    Fig 3: Inspecting Thermistor Resistance
    G03377106Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT CLIMATE CONTROL ECU CIRCUIT 

    Disconnect the connector from the climate control ECU and inspect connector on the wire harness side, as shown in the chart.

    Fig 4: Disconnecting Connector From Climate Control ECU
    G03377107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONNECTOR TERMINALS SPECIFIED CONDITION

    Tester connection Condition Specified condition
    8 - Ground Constant Continuity
    7 - Ground Turn ignition switch ON Battery positive voltage
    7 - Ground Turn ignition switch OFF No voltage

    If circuit is not as specified, replace the repair or replace the wire harness.

RENDER: 1.0x

NO RELATED

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