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Home >> Mazda >> 1990 >> RX-7 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Heat Hazard Sensor System Check >> Heat Sensor Test
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Heat Sensor Test

  1. 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 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.