NO.7 NO COOL AIR [MANUAL AIR CONDITIONER]
id0702c2812600
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7
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No cool air
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DESCRIPTION
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• Magnetic clutch does not operate.
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POSSIBLE CAUSE
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• A/C relay power supply circuit malfunction
• Evaporator temperature sensor signal circuit malfunction
• Evaporator temperature sensor characteristic malfunction
• A/C compressor malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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INSPECT AIR BLOW OUT
• Does air blow out?
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Yes
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Go to the next step.
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No
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Go to Step 1 of troubleshooting indexes No.1 and 2.
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2
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INSPECT FUSE
• Are the A/C relay power supply fuses normal?
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Yes
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Go to the next step.
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No
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Replace the fuse, then go to Step 6. If fuse burns out immediately, go to the next step.
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3
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CHECK TO SEE WHETHER MALFUNCTION IN EVAPORATOR TEMPERATURE SIGNAL CIRCUIT OR ELSEWHERE
• Retrieve the PCM (MZR 1.3, MZR 1.5) and instrument cluster (MZ-CD 1.6) DTC using the M-MDS.
• Are there following DTC displayed?
MZR 1.3, MZR 1.5:
MZ-CD 1.6:
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Yes
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Go to applicable DTC inspection.
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No
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Go to the next step.
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4
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INSPECT EVAPORATOR TEMPERATURE SENSOR
• Inspect the evaporator temperature sensor.
• Is it normal?
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Yes
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Go to the next step.
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No
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Replace the evaporator temperature sensor, then go to Step 6.
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5
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INSPECT A/C COMPRESSOR OPERATION
• Start the engine.
• Turn the A/C switch and fan switch on.
• Does the A/C compressor operate?
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Yes
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Go to Step 1 of troubleshooting index No.6.
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No
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Go to the next step.
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6
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CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
• Does cool air blow out? (Are the results of refrigerant system performance test normal?)
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Yes
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Troubleshooting completed. Explain repairs to customer.
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No
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Recheck malfunction symptoms, then repeat from Step 1 if the malfunction recurs.
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