Component Inspection

■ Check A/C pressure sensor 

1. IG "OFF" and connect the GDS.
2. Connect the probe to A/C pressure sensor signal and select the oscilloscope in the menu.
3. Check the waveform while turning A/C switch "ON" and "OFF" with engine running "ON" and "OFF".

   Specification:  refer to Signal Waveform & Data 

   Fig 1: Checking Signal Waveform Of A/C Pressure Sensor

   Courtesy of HYUNDAI MOTOR AMERICA
4. Is the measured waveform of A/C pressure sensor normal?

   YES 

   • Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair " procedure.

   NO 

   • Substitute with a known - good A/C pressure sensor and check for proper operation. If the problem is corrected, replace A/C pressure sensor and go to "Verification of Vehicle Repair " procedure.