No 5 Volts to A/C Pressure Sensor

NAME OF CODE:
No 5 Volts to A/C Pressure Sensor

WHEN MONITORED:
With the ignition ON.

SET CONDITION:
The A/C pressure sensor signal at PCM cavity 42 goes below 0.705 volts for more than 21.97 seconds

THEORY OF OPERATION:
The A/C pressure sensor informs the PCM if the A/C system pressure is too low or too high. This information allows the PCM to determine if it can engage the compressor clutch.
- If the A/C system pressure is too low, the PCM will not engage the compressor clutch.
- If the system pressure is too high, the PCM will disengage the compressor clutch and turn ON the cooling fans to prevent the compressor head pressure from becoming too high.

The sensor provides a signal to PCM cavity 42.
The sensor receives a 5 volt supply from PCM cavity 61.
The sensor ground is provided by PCM cavity 43.

POSSIBLE CAUSES:
- Open 5 volt supply
- A/C pressure sensor failure