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Discussion Starter · #1 ·
Hi,

I recently changed the serpentine and AC belts for my 2010 Mazda Axela 2.0 hatchback.

After replacing them, I noticed my AC stopped working (strange timing...)

To rule out any damage to the AC unit, I have done the following:
  1. 12v power direct to AC clutch - AC clutch engages like normal
  2. Ohms check of AC coil - shows correct reading
  3. Checked ALL fuses in car (engine bay and passenger) - all OK
  4. Swapped horn relay for AC relay - no change in AC operation (still doesn't work)
Upon disconnecting the AC clutch unit cable from the lead that comes off the car, I can see that the cable coming from the car (which connects to the AC clutch) does not give any power down this cable. Checked with a voltmeter and shows no power being received.

I connected a MaxiDiag Elite to the OBD port and scanned for errors and see the following:

EATC - Electronic Automatic Temperature Control - Fault |1



I'm struggling to find what to do with this error code; any assistance is greatly appreciated.
 

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Discussion Starter · #2 ·
FIXED.

After more research and contacting my local Mazda dealer, they advised it was most likely related to a BCM fault. I wasn't aware there was an additional fuse box/control unit under the passenger dashboard, so investigated it further only to discover a cable had worked itself loose.

I plugged it back in and the AC was instantly restored - problem solved!

106131


So to anyone else who comes across this in the future - make sure to check the BCM control box too!
 
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