P1598

Test 1 - 2:

Test 3 - 7:

SYMPTOM
P1598-A/C PRESSURE SENSOR VOLTAGE TOO HIGH

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

SET CONDITION
The A/C Pressure Sensor Signa at the PCM goes above 4.92 volts.

POSSIBLE CAUSES
- A/C Pressure sensor voltage above 4.9 volts
- A/C Pressure sensor
- (C18) A/C Pressure signal circuit shorted to voltage
- (C18) A/C Pressure signal circuit open
- (C18) A/C Pressure signal circuit shorted to (K6) 5-volt supply circuit
- (K4) Sensor ground circuit open
- PCM