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Home >> Mazda >> 1989 >> RX-7 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests >> Engine Sensors & Switches >> Heat Hazard Sensor >> Heat Sensor
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Heat Sensor

  1. To check heat hazard sensor, remove sensor. Wrap sensor and thermometer with aluminum foil to prevent oil penetration. Place thermometer and sensor in container of oil.
  2. Connect test light and battery to sensor terminals. See Fig 1 . Heat oil and note temperature in the aluminum foil when the test light activates. Test light should activate when temperature reaches 221-239°F (105-115°C). Replace sensor if not within specification.
CAUTION: DO NOT allow oil temperature to exceed 302°F (150°C).
Fig 1: Checking Heat Hazard Sensor
G117773Courtesy of MAZDA MOTORS CORP.