HVAC 37 10 Verify whether malfunction is in compressor oil or elsewhere Add 30 ml of compressor oil. Is noise heard when racing engine? Yes Go to next step. No Troubleshooting completed. Explain repair to customer. 11 Verify whether malfunction is in A/C compressor or elsewhere Drain compressor oil. Is it contaminated with metal particles? Yes Go to next Step. No Replace A/C compressor, then go to Step 19. 12 Verify whether malfunction is somewhere in a/c system or elsewhere Is compressor oil whitish and mixed with water? Yes Replace entire A/C system (Excluding heater), then go to Step 19. No Go to next step. 13 Inspect A/C compressor oil Is compressor oil darker than normal and contaminated with aluminum chips? Yes Replace A/C compressor and condenser, then go to Step 19 (Since A/C compressor may be worn and receiver/drier may be clogged, replacement of receiver/drier is necessary.) No Condition is normal. Recheck malfunction symptoms. 14 Verify whether malfunction is in A/C compressor or elsewhere Is noise heard immediately after A/C compressor is stopped? Yes Replace A/C compressor, then go to Step 19. (A/C compressor discharge valve left open) No Go to next step. 15 Inspect drive belt Is it okay? Yes Go to next step. No Adjust or replace drive belt, then go to Step 19. 16 Inspect drive belt condition Is drive belt worn? Does it have foreign material imbedded in it, or gave oil on it? Yes Remove obstruction, remove oil, or replace drive belt, then go to Step 19. No Go to next step. 17 Inspect magnetic clutch. Is it okay? Yes Replace A/C compressor, go to Step 19. No Replace A/C compressor, then go to Step 19. 18 Verify whether malfunction is in A/C compressor or refrigerant lines Is noise emitted from A/C compressor? Yes Visually inspect A/C compressor, replace appropriate parts if necessary, then go to next step. No If noise is due to refrigerant lines, repair detached or missing clips, tighten loose bolts, then go to next step. 19 Verify that malfunction symptom occurs after repair Has A/C compressor noise stopped? Yes Troubleshooting completed. No Explain repairs to customer. Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.
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