P1598

Tests 641 - 645:

Tests 646 - 648:

SYMPTOM
P-1598 A/C PRESSURE SENSOR VOLTAGE TOO HIGH

WHEN MONITORED
With the ignition on, the engine running, and the A/C relay energized.

SET CONDITION
The A/C pressure sensor signal at PCM cavity 42 goes above 4.9 volts.

POSSIBLE CAUSES
- AC pressure sensor circuit shorted to voltage
- AC pressure sensor ground circuit open
- AC pressure sensor signal circuit open
- PCM defective (AC pressure sensor circuit)
- A/C pressure sensor defective
- AC pressure sensor conn/wiring harness inter damage
- AC pressure sensor conn/wiring harness observable damage