My 2003 X5 3.0 suddenly quit Air Conditioning. I then noticed the climate control module was dark. All the fuses are intact.34,48 and 64. There is a DTC code 4A in the ECM. In addition, the instrument lights, cigarette lighter window control lights all flicker when the headlights turn on. My scanner has no communication with the IHKA/IHKR module, The SZM switching center center console, the STH park heating, SHD sliding/tilting sunroof and MFL multifunction steering wheel. There are faults in modules I've never seen before. SRS fault lamp. I ordered a used climate control module which I will get next week but I fear there is another electrical problem that needs to be addressed before I install it. I may have to take it to the dealer for diagnosis which I dread.
Any help would be appreciated.
PS. Replaced battery. (AGM was leaking)
What’s the voltage at the jumper post located under the hood under the red plastic cover? Check with:
- everything off
- engine idling
- engine revving at 2000rpm.
How did you check the fuses? Did you pull them and check them with an ohm meter?
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