P0530

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

Schematic:

The A/C refrigerant pressure sensor responds to the changes in the A/C refrigerant high side pressure. This input indicates how much load the A/C compressor is putting on the engine and is one of the factors used by the Powertrain Control Module (PCM) in order to determine the Idle Air Control (IAC) position for the idle speed. The circuits consist of a 5 volt reference and a ground, both provided by the PCM, and a signal from the sensor. The signal is a voltage which is proportional to the A/C pressure. The sensor's operating range is between 0 and 459 psi. At 0 psi, the signal voltage will be about 0.1 volts, varying to about 4.9 volts at 459 psi.

DTC PARAMETERS
DTC P0530 will set if any of the following conditions are met for 15 seconds:
^ The A/C refrigerant sensor pressure is greater than 453 psi (4.94V) with the A/C requested.

Or

^ The A/C refrigerant sensor pressure is greater than 363 psi (4.0V) with the A/C requested.

Or

^ The A/C refrigerant sensor pressure is less than 0 psi (0.2V) when the intake air temperature is greater than 0°C (32°F) and DTC P0112 or P0113 is not set.

Or

^ The A/C refrigerant sensor pressure is less than 0 psi (0.10V) when and IAT sensor DTC is present or IAT is less than 0°C (32°F).

DIAGNOSTIC AIDS
Check for poor connections and damaged harness.

If actual pressure of the A/C system (measured with gauge set) matches Scan tool, repair any A/C problems before diagnosing this DTC. After repair retest.

The PCM will disable A/C clutch when this DTC is set.