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 Signal 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