Component Inspection

A/C pressure sensor inspection

Key "OFF" and connect the scantool.
Connect the probe to A/C pressure sensor signal and select the oscilloscope in the menu.

Check the change of waveform with A/C "ON" and "OFF" after engine start.

Specification :

SPECIFICATION CHART

Pressure (psi)	14.7	100	200	300	470
Voltage (V)	0.50	1.25	2.13	3.00	4.50

Fig 1: Identifying A/C Pressure Sensor Connector Terminals

G06830999

Courtesy of KIA MOTORS AMERICA, INC.

Is the measured waveform of A/C pressure sensor normal?
YES
1. 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.
  CAUTION: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM.
  Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others
NO
1. 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.