Inspection procedure

1. Operate the A/C system and check the operation. Refer to "WITHOUT ACCS: DESCRIPTION and INSPECTION " (WITHOUT ACCS) or "WITH ACCS: DESCRIPTION and INSPECTION " (WITH ACCS).
2. Check the parts where noise is occurring.

   Can the parts where noise is occurring be checked? 

   YES-1: Noise from blower motor: GO TO 2.

   YES-2: Noise from compressor: GO TO  3.

   YES-3: Noise from expansion valve: GO TO  4.

   YES-4: Noise from A/C piping (pipe, flexible hose): GO TO 6.

   YES-5: Noise from drive belt: GO TO  7.

   NO: INSPECTION END

1. Remove blower motor.
2. Remove in-cabin microfilter.
3. Remove foreign materials that are in the blower unit.
4. Check the noise from blower motor again.

   Is the inspection result normal? 

   YES: INSPECTION END

   NO: Replace blower motor.

1. Correct the refrigerant with recovery/recycling recharging equipment.
2. Recharge with the proper amount of the collected refrigerant after recycling or new refrigerant.
3. Check for the noise from compressor again.

   Is the inspection result normal? 

   YES: INSPECTION END

   NO: Replace compressor.

Perform the diagnosis with the gauge pressure. Refer to "TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE " (VQ37VHR) or "TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE " (VK50VE).

Is the inspection result normal? 

YES: GO TO 5.

NO: Repair or replace malfunctioning part(s).

1. Correct the refrigerant with recovery/recycling recharging equipment.
2. Recharge with the proper amount of the collected refrigerant after recycling or new refrigerant.
3. Check for the noise from expansion valve again.

   Are the symptoms solved? 

   YES: INSPECTION END

   NO: Replace expansion valve.

1. Check A/C piping (pipe, flexible hose) (for deformation and damage, etc.).
2. Check the installation condition of clips and brackets, etc. of A/C piping (pipe, flexible hose).

   Is the inspection result normal? 

   YES: Fix the line with rubber or come vibration absorbing material.

   NO: Repair or replace parts according to the inspection results.

Check tension of the drive belt. Refer to "CHECKING " (VQ37VHR) or "CHECKING " (VK50VE).

Is the inspection result normal? 

YES: Check the noise from compressor: GO TO  3.

NO: Adjust or replace drive belt according to the inspection results.