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Connect prove to signal terminal as below and select 'Ocilloscope' menu on GDS.

Channel A (+): Signal terminal of A/C pressure sensor, (-): Ground

Engine start and check the signal with operation.

Is waveform within specification?

	▶ Check for poor connection between PCM/ECM 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" procedure.
	▶ 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" procedure.