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 below.

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

   [ECV1] 

   Fig 1: Display - 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: Display - Aircon Compressor Test Preparation (ECV2)

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   [ECV3] 

   Fig 3: Display - Aircon Compressor Test Preparation (ECV3)

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

   [ECV4] 

   Fig 4: Display - Aircon Compressor Test Conditions (ECV4)

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4. Start inspection

   [ECV5] 

   Fig 5: Display - ECV Performance Test (ECV5)

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   [ECV6] 

   Fig 6: Display - ECV Performance Test (ECV6)

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   CAUTION: Check if condenser fan is operating when condition is changed to 'ECV running'
   CAUTION: Relife 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 Relife valve
   * Noise occurred when Relife valve is in operation
5. Check the result of inspection and click 'Check Detail' if it's 'Check'. Follow the instruction and inspect ECV again from the first step.

   [ECV7] 

   Fig 7: Display - ECV Performance Test completed Screen (ECV7)

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   [ECV8] 

   Fig 8: Display - ECV Performance Test completed Screen (ECV8)

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