L300 A/C Diagnosis
Okay, my A/C doesn’t work as in, when I turn it on, nothing happens. Today, I will begin diagnosis and will document it here. Come along!
I was curious if the compressor could even receive power. First, I decided to check for continuity through the fusible links and to the compressor. I wanted to do this so I would know which fusible link was on the compressor’s circuit. While setting the test up, I decided to skip the search for the fusible link and merely see if the compressor would receive power. I was happy to see the clutch engage when I jumped the 12v side of the battery to the lead on the compressor.
Once I determined that the compressor could indeed receive power from the battery, I went ahead with the aforementioned continuity test in an effort to understand which link was on the compressor’s circuit.
Well, I know there’s a lot that goes into even having the A/C circuit complete. Knowing the circuit from the battery to the compressor was complete as well as the fact that the clutch would engage was comforting. Now, it’s time to dig around and see what other sensors are in the circuit. Something is keeping the circuit open. I suspect there’s a sensor for refrigerant level and it’s likely open. However, there are a few other sensors as well. I suppose I’ll try to find and check’em all.
To Be Continued
