P1598

Tests 1 - 2:

Tests 3 - 7:

Test 8:

SYMPTOM
P1598-A/C PRESSURE SENSOR VOLTS 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
- Intermittent condition
- A/C pressure sensor signal circuit shorted to 5 volt supply circuit
- A/C pressure sensor signal circuit shorted to battery voltage
- A/C pressure sensor internal failure
- A/C pressure sensor signal circuit open
- Sensor ground circuit open
- PCM