05-06-2013, 11:47 AM
So ya, I thought my A/C was broken this weekend.
A/C compressor wouldnt cycle on. Checked the relay, tested fine. Replaced it anyway, still no worky. Checked the charge, all good there to. Jumped the relay and tested the compressor, all good.
Cool thing with the auto climate control, is if you push a couple of buttons while starting the car it goes into a diagnostic mode. If a light is blinking you pull out the manual and bam..... "Evaporator Sensor Malfunction". Check the location of said sensor, it is behind the glove box, easy to get to.
Rewind to a couple days prior.
I am behind the glove box screwing with the wiring to try and rewire the DRLs. After I gave up, I noticed 2 wires leading into the A/C box housing the Evaporator. The wire has a lil twisty knob on it. So I turn the knob and nothing is happening so i'm like, WTF.....no idea what that is for, mm kay. Bolt everything back up and say screw rewiring the DRLs.
Back to yesterday, the Evaporator Sensor just happens to be in the same location as the lil twisty knob I was playing with. So 1 of the 2 POs, has replaced this sensor with a thermistor instead of paying $50 for a new sensor, and the knob adjusted the resistance traveling through that thermistor. The thermistor is used to basically sense the temp of the Evaporator to make sure it doesnt freeze up. So I pulled out the multimeter and adjusted the knob so it was within spec. Voila, working A/C, and no more error code through the Climate control diagnostics.
So note to self, if you see a button, or a knob, and you dont know WTF it does......leave it alone.
Also, the Factory Service Manual I spent the last 3 days downloading, was the greatest $35 I have ever spent. If it hadnt limited me to 40-50 files an hour, it would have been done in less than an hour. 560 PDF files, equated to having to DL stuff in like 11-12 sessions.
I was able to diagnose my issue within 20 minutes.
A/C compressor wouldnt cycle on. Checked the relay, tested fine. Replaced it anyway, still no worky. Checked the charge, all good there to. Jumped the relay and tested the compressor, all good.
Cool thing with the auto climate control, is if you push a couple of buttons while starting the car it goes into a diagnostic mode. If a light is blinking you pull out the manual and bam..... "Evaporator Sensor Malfunction". Check the location of said sensor, it is behind the glove box, easy to get to.
Rewind to a couple days prior.
I am behind the glove box screwing with the wiring to try and rewire the DRLs. After I gave up, I noticed 2 wires leading into the A/C box housing the Evaporator. The wire has a lil twisty knob on it. So I turn the knob and nothing is happening so i'm like, WTF.....no idea what that is for, mm kay. Bolt everything back up and say screw rewiring the DRLs.
Back to yesterday, the Evaporator Sensor just happens to be in the same location as the lil twisty knob I was playing with. So 1 of the 2 POs, has replaced this sensor with a thermistor instead of paying $50 for a new sensor, and the knob adjusted the resistance traveling through that thermistor. The thermistor is used to basically sense the temp of the Evaporator to make sure it doesnt freeze up. So I pulled out the multimeter and adjusted the knob so it was within spec. Voila, working A/C, and no more error code through the Climate control diagnostics.
So note to self, if you see a button, or a knob, and you dont know WTF it does......leave it alone.
Also, the Factory Service Manual I spent the last 3 days downloading, was the greatest $35 I have ever spent. If it hadnt limited me to 40-50 files an hour, it would have been done in less than an hour. 560 PDF files, equated to having to DL stuff in like 11-12 sessions.
I was able to diagnose my issue within 20 minutes.