A/C Pressure Sensor Repair Procedures

Inspection

1. 1
   Measure the high-pressure line pressure by measuring the output voltage between terminals "1" and "2".

   

2. 2
   Check whether the voltage value is within the normal range.

   Voltage = 0.00878835 * Pressure + 0.37081095

3. 3
   If the measured voltage value does not meet the specification, replace the A/C pressure sensor.

Diagnosis Using GDS

1. 1
   The heating, ventilation, and air conditioning system faults can be quickly diagnosed using the Global Diagnostic System (GDS). ※ The GDS provides the following information: (1) Self-diagnosis: Check and display of diagnostic trouble codes (DTC). (2) Current data: Check the input/output status of system data. (3) Active test: Check the operating status of the system. (4) Additional functions: Other controls such as system option and zero point adjustment.
2. 2
   Select "Vehicle Model" and the system to be checked to inspect the vehicle with the tester.
3. 3
   Select the "Current Data" menu to view the current input/output data status. The input/output data for sensors related to the A/C pressure sensor can be checked.

   

Replacement

1. 1
   Disconnect the negative (-) battery terminal.
2. 2
   Recover the refrigerant using a recovery/recharging station.
3. 3
   Disconnect the air conditioner pressure sensor connector (A).

   

4. 4
   Remove the A/C pressure sensor (A).

   Tightening Torque: 9.8–11.8 N·m

   

5. 5
   To install, reverse the removal procedure.