Electronic Tester for AC Compressor Valtest 371 automotive diagnostic tools car care diagnostic tools

Valtest connection and tests:

1- Disconnect the compressor from the ECU.

2- Connect the compressor to the VALTEST.

3- Connect the output of the ECU to the input of the VALTEST.

4- Turn on the VALTEST and verify the state of the

valve"SHORT CIRCUIT" or "OPEN CIRCUIT". Turn off the

VALTEST.

5- Start the car engine, the air-conditioning, and the VALTEST.

6-Verify the pressures reducing and increasing the signal with

the"+" and "-" of the instrument.

Results of the test:

- If you have the indication OC / LO on the display, then you must to change the valve.

- If the compressor compresses and works normally, there is a fault in the Electronic Control Unit (ECU).

- If the compressor does not work, you have to verify the state of the valve and change it.

- If it still does not work, you have to change the compressor.

l We are a professional auto A/C parts supplier with 14 years experience.

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