Component Inspection

IG 'OFF'.
Connect prove to signal terminal as below and select 'Oscilloscope' menu on GDS.
Channel A (+): Signal terminal of A/C pressure sensor, (-): Ground
Engine start and check the signal with operation.

Fig 1: Checking Signal Of A/C Pressure Sensor
Courtesy of HYUNDAI MOTOR CO.
Is waveform within specification?
YES
- Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to VERIFICATION OF VEHICLE REPAIR .
NO
- Check A/C pressure sensor for contamination, deterioration, or damage. 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 then go to VERIFICATION OF VEHICLE REPAIR .