External Control Valve Compressor Inspection (Diagnostic tool)

Compressor type: Fixed type compressor, External control valve, Internal control valve.

In cases of fixed type and internal control valve, it is possible to inspect compressor's operation with clutch noise.

When it comes to External control valve, however, it cannot be checked in this way because it doesn't have a clutch.

So, ECV should be inspected with Diagnostic tool as shown below.

1. Connect Diagnostic tool to the vehicle and select 'Aircon Compressor Test (ECV type)'

   [ECV1] 

   Courtesy of HYUNDAI MOTOR AMERICA

2. Make the vehicle ready as the Diagnostic tool instruction on the monitor. (Turn off A/C 'switch' only)

   Courtesy of HYUNDAI MOTOR AMERICA

3. Check if other DTC codes are found before inspect ECV compressor. If so, solve that problems first. If not, press 'OK' button to continue.

   Information 

   Do not continue inspection if these DTC codes are found: B1241, B1242, B1672, B1685, B1686, B1687

   Courtesy of HYUNDAI MOTOR AMERICA

4. Start inspection

   Courtesy of HYUNDAI MOTOR AMERICA

   Courtesy of HYUNDAI MOTOR AMERICA

   CAUTION: Check if condenser fan is operating when condition is changed to 'ECV running'
   CAUTION: Relief valve will operate if condenser fan doesn't work due to overpressure in the compressor. It helps the air conditioning system to relieve by releasing refrigerant and oil (lost if relieved).
   * Refill refrigerant and oil after operation of relief valve
   * Noise occurred when relief valve is in operation
5. Check the result of inspection.

   [ECV7] 

   Courtesy of HYUNDAI MOTOR AMERICA

   [ECV8] 

   Courtesy of HYUNDAI MOTOR AMERICA

6. If the result shows "Check", click "Check" and follow the instruction.

   Courtesy of HYUNDAI MOTOR AMERICA

7. Inspect ECV again from the first step.