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SYMPTOM TROUBLESHOOTING 07-03–13 07-03 NO.7 AIR FROM VENTS NOT COLD ENOUGH id070300801000 Diagnostic procedure 7 Air from vents not cold enough. DESCRIPTION • Magnetic clutch operates but A/C system malfunctions. POSSIBLE CAUSE • Drive belt malfunction • A/C unit or condenser malfunction • Receiver/drier or expansion valve malfunction (valve closes too much) • Malfunction in refrigerant lines • A/C compressor system malfunction, insufficient compressor oil • Over filling of compressor oil, malfunction in expansion valve or A/C unit air mix link system STEP INSPECTION ACTION 1 INSPECT DRIVE BELT • Inspect the drive belt. (See 01-10-3 DRIVE BELT INSPECTION[L3 • Is it normal? Yes Go to the next step. No Adjust or replace the drive belt, then go to Step 20. 2 INSPECT REFRIGERANT SYSTEM • Perform refrigerant system performance test. (See 07-10-6 REFRIGERANT SYSTEM • Is the operation normal? Yes Operation is normal. (Recheck malfunction symptoms.) No Go to the next step. 3 INSPECT TO SEE WHETHER MALFUNCTION • Are the refrigerant high-pressure and low- pressure values both high? Yes Go to the next step. No Go to Step 6. 4 INSPECT A/C UNIT INTAKE • Is the A/C unit intake clogged? Yes Remove obstruction, then go to Step 20. (If air does not No Go to the next step. 5 INSPECT CONDENSER • Inspect the condenser. (See 07-11-18 CONDENSER • Is it normal? Yes Adjust refrigerant to the specified amount, then go to Step No Replace the condenser, or repair and clean the condenser 6 INSPECT TO SEE WHETHER MALFUNCTION • Are the refrigerant high-pressure and low- pressure values low? Yes Go to the next step. No Go to Step 14. 7 INSPECT TO SEE WHETHER MALFUNCTION • Immediately after the A/C compressor operates, does the refrigerant high-pressure Yes Go to the next step. No Go to Step 10. 8 INSPECT TO SEE WHETHER MALFUNCTION • Turn the A/C switch off and let the air conditioner stop for 10 min. • Start the engine. • Turn the both A/C switch and airflow volume control dial on. • Does the malfunction occur after the A/C compressor turns on? Yes Go to the next step. No Replace the condenser and vacuum the refrigerant line 1871-1U-06B(07-03).fm 13 ページ 2006年3月15日 水曜日 午前11時28分 |