P1599

Test 1 - 2:

Test 3 - 8:

SYMPTOM
P1599-A/C PRESSURE SENSOR VOLTAGE TOO LOW

WHEN MONITORED
With the engine running and the A/C Relay energized.

SET CONDITION
The A/C Pressure Sensor Signal voltage at the PCM goes below 0.58 of a volt for 2.6 seconds.

POSSIBLE CAUSES
- A/C pressure sensor voltage below 0.6 of a volt
- (K6) 5 volt supply circuit open
- (K6) 5 volt supply circuit shorted to ground
- A/C pressure sensor
- (C18) A/C pressure signal circuit shorted to ground
- (C18) A/C pressure signal circuit shorted to (K4) sensor ground circuit
- PCM