P1599

Test 1 - 2:

Test 3 - 7:

Test 8 - 10:

SYMPTOM
P1599 - A/C PRESSURE SENSOR VOLTS TOO LOW

WHEN MONITORED
Engine running. The A/C relay energized.

SET CONDITION
The A/C pressure sensor signal voltage at the PCM goes below 0.58 volts for 2.6 seconds.

POSSIBLE CAUSES
- Intermittent Condition
- (F855) 5-Volt Supply Circuit Shorted To Ground
- (F855) 5-Volt Supply Circuit Open
- A/C Pressure Sensor Internal Failure
- (C18) A/C Pressure Sensor Signal Circuit Shorted To Ground
- (C18) A/C Pressure Sensor Signal Circuit Shorted To (K900) Sensor Ground Circuit
- PCM (F855) 5-Volt Supply Circuit
- PCM (C18) A/C Pressure Sensor Signal