P1598

Test 1 - 2:

Test 3 - 7:

Test 8:

SYMPTOM
P1598 - A/C PRESSURE SENSOR VOLTS TOO HIGH

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

SET CONDITION
The A/C pressure sensor signal at the PCM goes above 4.92 volts.

POSSIBLE CAUSES
- Intermittent condition
- (C18) A/C pressure sensor signal circuit shorted to (F855) 5-Volt supply circuit
- (C18) A/C Pressure sensor signal circuit shorted to battery voltage
- A/C pressure sensor internal failure
- (C18) A/C pressure sensor signal circuit open
- (K900) sensor ground circuit open
- PCM