External Control Valve Compressor Inspection (GDS)

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 instructed.

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

   [ECV1] 

   Fig 1: Display - Aircon Compressor Test Screen (ECV1 Type)

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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: Display - Aircon Compressor Test Screen (ECV2 Type)

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   [ECV3] 

   Fig 3: Display - Aircon Compressor Test Screen (ECV3 Type)

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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

   [ECV4] 

   Fig 4: Display - Aircon Compressor Test Screen (ECV4 Type)

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4. Start inspection

   [ECV5] 

   Fig 5: Display - Aircon Compressor Test Screen (ECV5 Type)

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   [ECV6] 

   Fig 6: Display - Aircon Compressor Test Screen (ECV6 Type)

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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: Display - Aircon Compressor Test Screen (ECV7 Type)

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   [ECV8] 

   Fig 8: Display - Aircon Compressor Test Screen (ECV8 Type)

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6. If the result shows "Check", click "Check" and follow the instruction.
   Fig 9: Display - Inspection Procedure For Check Result From Diagnosis Test Screen

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7. Inspect ECV again from the first step.