Celica 2WD L4-2.0L (3S-FE) (1988)
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Compressor Speed Sensor: Testing and Inspection
Testing Compressor Revolution Sensor
Using an ohmmeter, measure the resistance between two terminals of the sensor.
Standard resistance: 100 - 130 Ohms at 2O°C (68°F)
If resistance is not as specified, replace the revolution detecting sensor.