AIR CONDITIONING SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
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If the malfunction still exists even after checking and confirming that all the circuits are normal, replace the PTC amplifier.
| Symptom | Suspected Area | See page |
|---|---|---|
| PTC heater does not operate under these conditions: Engine coolant temperature: 65 (149) or below, engine rpm is at idle rpm or more, temperature control knob: MAX HOT | PTC heater relay | |
| Heater switch assembly | - | |
| Air mix control cable | - | |
| Heater control assembly | ||
| Heater unit assembly (temperature control switch) | ||
| PTC heater amplifier assembly | ||
| ECM | ||
| Wire harness | - |