Component Inspection

Component Inspection

1. A/C pressure sensor inspection
(1) IG Key "OFF" and connect the scantool.
(2) Connect the probe to A/C pressure sensor signal and select the oscilloscope function.
(3) Start the engine, and monitor the waveform while increasing and decreasing engine speed.
A. Specification :









(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.

CAUTION:
There is a memory reset function on scantool that can erase optional components automatically detected and memorized by PCM.Before or after testing PCM on the vehicle, use this function to reuse the PCM.