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A/C Pressure Sensor

Disconnect A/C pressure sensor connector. Using an ohmmeter, measure resistance between sensor terminals. See A/C PRESSURE SENSOR VOLTAGE SPECIFICATIONS  table. If resistance is not as specified, replace sensor.

NOTE: A/C pressure sensor voltage for DENSO system should be about 0.7-0.9 volts with ignition key on and engine off. This is an analog signal that increases toward 5 volts as A/C pressure increases.
A/C PRESSURE SENSOR VOLTAGE SPECIFICATIONS (ME7)

A/C Pressure - psi (kPa) Volts
0 0.25
75 (517) 1
175 (1206 2
275 (1894) 3
450 (3100) 4.75