A/C Pressure Sensor Repair Procedures

Inspection

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

   

2. 2
   Check whether the voltage value is within the normal value or not.

   

   Vdd * (0.001758 * Pressure (psia) + 0.074126)

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 can quickly diagnose faulty components using the Generic Diagnostic System (GDS). The diagnostic system (GDS) provides the following information: (1) Self-diagnosis: Diagnostic Trouble Code (DTC) check and display. (2) Current data: Checking the input/output status of the system. (3) Actuation test: Checking 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 check the current input/output status. The input/output data for sensors corresponding 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

   

   Be careful not to bend the liquid line and suction line.

5. 5
   Install in the reverse order of removal.

   When installing, replace it with a new O-ring (A).