Repair procedures: Inspection

1. Check the plated parts of the disc & hub assembly (A) for color changes, peeling or other damage. If there is damage, replace the clutch set.
   Fig 1: Checking Plate Parts Of Disc And Hub Assembly

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2. Check the pulley (B) bearing play and drag by rotating the pulley by hand. Replace the clutch set with a new one if it is noisy or has excessive play/drag.
3. Check operation of the magnetic clutch.

   Connect the compressor side terminals to the battery (+) terminal and the ground battery (-) terminal to the compressor body. Check the magnetic clutch operating noise to determine the condition.

   Fig 2: Connecting Compressor Side To Battery Terminal

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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 3: Display - Aircon Compressor Test Screen (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 4: Display - Aircon Compressor Test Screen (ECV2)

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   [ECV3] 

   Fig 5: Display - Aircon Compressor Test Screen (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.

   Information 

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

   [ECV4] 

   Fig 6: Display - Test Condition Screen (ECV4)

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4. Start inspection

   [ECV5] 

   Fig 7: Display - ECV Performance Test (ECV5)

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   [ECV6] 

   Fig 8: Display - ECV Performance 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 and click 'Check Detail' if it's 'Check'. Follow the instruction and inspect ECV again from the first step.

   [ECV7] 

   Fig 9: Display - ECV Performance Test (ECV7)

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   [ECV8] 

   Fig 10: Display - ECV Performance Test (ECV8)

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