P0532

Circuit Description

The A/C Refrigerant Pressure sensor is a sensor that changes resistance based upon refrigerant pressure. The PCM provides a 5 volt reference and ground. The A/C refrigerant sensor signal varies between ground and 5 volts as refrigerant pressure varies. As A/C refrigerant pressure increases, voltage increases. As A/C refrigerant pressure decreases, voltage decreases. A short to ground or open condition would cause the A/C refrigerant pressure sensor signal to go low, setting DTC P0532.

Conditions for Running the DTC

Engine running.

Conditions for Setting the DTC

The A/C refrigerant pressure sensor reading has been 0.10 volts or less.

Action Taken When the DTC Sets

^ The Malfunction Indicator Lamp (MIL) will not illuminate.
^ No message will be displayed.

Conditions for Clearing the MIL/DTC

^ A History DTC will clear after forty consecutive warm-up cycles with no failures of any non-emission related diagnostic test.
^ A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail.
^ Use a scan tool to clear DTCs.
^ Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended. Refer to Clearing Diagnostic Trouble Codes. Reading and Clearing Diagnostic Trouble Codes

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

2. If the A/C refrigerant pressure sensor or circuitry are open, the A/C refrigerant pressure sensor parameter will read 0.0 to 0.10 volts.
3. Checking if circuitry from sensor to PCM is able to respond to a 5 volt signal on the A/C refrigerant pressure input. A reading of 4.5 to 5.12 volts means wiring and PCM are OK.