RX7 2RTR- 1308cc 1.3L FI (1987)
Heat Hazard Sensor: Testing and Inspection
WARNING SYSTEM INSPECTION
Heat Hazard Warning Light
1. Heat hazard warning lamp should light when ignition is switched "ON."
2. When engine is started, light should go out.
Heat Hazard Sensor
3. To check bulb and wiring, unplug sensor connector beneath passenger seat and floor mat.
4. Install a jumper wire between connector terminals (vehicle harness side). With ignition "ON," warning lamp should light.
5. If not, check connector, wiring and bulb. Repair as needed.
Heat Hazard Sensor Testing
SENSOR TESTING
1. Remove sensor from beneath passenger side seat and floor mat.
2. Wrap sensor and a thermometer in aluminum foil and place in a heat resistant container of oil. Ensure that foil is carefully sealed to prevent oil
from entering.
3. Connect a test lamp and battery to sensor connector terminals.
4. Gradually heat oil. Test lamp should light when temperature within the foil reaches 221 - 239°F (105 - 115°C). Do not heat oil above 302°F (150
°C).
5. Replace sensor if it does not operate as specified.