External Control Valve Compressor Inspection (GDS)

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

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 GDS as below:

1. Connect GDS to the vehicle and select Aircon Compressor Test (ECV Type).

   [ECV1]

   Fig 1: Aircon Compressor Test (ECV1)

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

   [ECV2]

   Fig 2: Test Preparation (ECV2)

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   [ECV3]

   Fig 3: Test Preparation (ECV3)

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3. Check if other DTC codes are found before inspecting ECV compressor. If so, solve that problems first. If not, press 'OK' button to continue. Do not continue inspection if these DTC codes are found: B1241, B1242, B1672, B1685, B1686, B1687.

   [ECV4]

   Fig 4: Test Conditions (ECV4)

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4. Start Inspection.

   [ECV5]

   Fig 5: ECV Test (ECV5)

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   [ECV6]

   Fig 6: ECV Test (ECV6)

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   CAUTION: Check if condenser fan is operating when condition is changed to 'ECV running'
   CAUTION: Relief valve will be operated if a condenser fan doesn't work because of overpressure in the compressor. It helps the air conditioning system to relieve by releasing refrigerant and oil. (Closed 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]

   Fig 7: Test Result (ECV7)

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   [ECV8]

   Fig 8: Test Result (ECV8)

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

   Fig 9: Inspection Procedure For "Check" Result From Diagnosis Test

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   Inspect ECV again from the first step.