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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 528 (Control System (HVAC)) >> THERMOSWITCH Inspection >> To Inspect On/Off Points of the Thermoswitch

To Inspect On/Off Points of the Thermoswitch

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable.
  2. Remove the cooling unit. (See COOLING UNIT REMOVAL/INSTALLATION .)
  3. Remove the thermoswitch (See COOLING UNIT DISASSEMBLY/ASSEMBLY .)
  4. Connect the negative battery cable.
  5. Connect the thermoswitch connector to the wiring harness connector.
  6. Turn the ignition switch to ON position.
  7. Turn the A/C switch on.
  8. Turn the fan switch on.
  9. Immerse the sensor part of thermoswitch in a container of ice water.
  10. Connect the positive (+) and negative (-) probes of the voltmeter to terminal A and terminal B of the thermoswitch respectively.
  11. Inspect the voltage as shown below.
    • If not as specified, replace the thermoswitch.

      (See COOLING UNIT DISASSEMBLY/ASSEMBLY .)

      Fig 1: Thermoswitch Terminal Connector Continuity
      G03638574Courtesy of MAZDA MOTORS CORP.
      Fig 2: Inspecting Thermoswitch Voltage
      G03638575Courtesy of MAZDA MOTORS CORP.
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