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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 12-11-2011, 05:01 AM
blrot blrot is offline
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Location: River Vale, NJ
 
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Mein Auto: 2011 328i, 2002 540i
Climate control module blown fuse #9 issue!?!?

2002 540i has a new issue! Several days ago, I lost power to the climate control module. No lights, heat, a/c, fan, rear defroster, etc. Replaced the blown fuse #9, and it blew after several minutes. I replaced the fuse again and turned off the a/c button and the unit has functioned just fine for two days, so the problem seems to be related to the a/c! I'm looking for suggestions as to how to isolate the culprit. The fuse does blow several minutes after hitting the a/c button!! Any suggestions before bringing it it???
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  #2  
Old 12-11-2011, 05:20 AM
JimLev JimLev is offline
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F9 is a 15 amp fuse that supplies power to the heated washer jets as well as the CCM panel.
Make sure you are using a 15 amp fuse.
Unplug the washer jets and see if the fuse doesn't blow. If it does it looks like your CCM module is bad.
Is your outside temp reading that is in the speedo cluster working?
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  #3  
Old 12-11-2011, 06:07 AM
blrot blrot is offline
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The outside temp reading is working and I will go unplug the heated washer jets and turn on the a/c and see what happens. I picked up a six pack of the 15 amp fuses yesterday, so I'm good to go for some more troubleshooting! Not ready to condemn the unit yet!! Thanks for the suggestions, and I'll report back with the results in a while!
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  #4  
Old 12-11-2011, 07:50 AM
blrot blrot is offline
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I unplugged the heated washer jets, turned on the a/c, and so far, so good! Drove for ~15 minutes and all is well. Thanks, JimLev!!! I'll see what happens over the next few days and spend some time shopping for new jets!!
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  #5  
Old 12-11-2011, 09:01 AM
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bluebee bluebee is offline
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Quote:
Originally Posted by blrot View Post
I unplugged the heated washer jets... and so far, so good!
I'm curious.

Where, exactly on the harness, do you unplug the washer jet wires?

Picture is from this thread:
- Pre-winter inspection of a user's windshield washer system (1)
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  #6  
Old 12-11-2011, 09:12 AM
blrot blrot is offline
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Follow the wires about 6 inches from the nozzle and under the hood insulation you'll find the connectors (one for each nozzle). I just unplugged them both which seems, so far to have isolated my particular problem!!
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  #7  
Old 12-11-2011, 12:08 PM
blrot blrot is offline
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Back to the drawing board! Used the car for about 45 minutes and it blew again!! A friend, a BMW master mechanic, will take the car in to his dealership during the week to diagnose!!
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  #8  
Old 12-22-2011, 08:58 AM
blrot blrot is offline
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Update: The car was dropped off yesterday at my Indy and looked at briefly as he couldn't get to it until late afternoon. The search for the problem will continue today and appears to be coming from a short in the wiring leading to the aux water pump! Hopefully this gets diagnosed soon and I will report back with a final result!
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  #9  
Old 12-22-2011, 09:22 AM
JimLev JimLev is offline
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The aux water pump gets it's power from the climate control module.
The current that the motor draws could be easily measured with a meter in place of F9.
If it is at or near 15 amps it's probably the pump motor that is bad.
The motor can be unplugged to see if the current drops down to a low value, which would indicate the motor is drawing too much current.
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  #10  
Old 12-22-2011, 10:11 AM
blrot blrot is offline
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Thanks Jim. I appreciate your input and will pass it to my tech within the hour! The IHKA unit from what I was told yesterday, seems to be functioning as it should, but the signal it sends to the aux water pump is not received. This is where the short is suspected. He won't be getting back to the car until later today.
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  #11  
Old 12-22-2011, 10:14 AM
cn90 cn90 is offline
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The Aux WP might have shorted out.
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  #12  
Old 12-22-2011, 01:01 PM
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Trebbia Trebbia is offline
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Quote:
Originally Posted by cn90 View Post
The Aux WP might have shorted out.
What bad happens if the OP just unplugs the aux water pump wires?

To the OP the electrical water pump is on the bottom of the radiator nearer to the driverside and on the inside bottom.

I don't know where the wire plugs into the harness though.
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  #13  
Old 12-22-2011, 03:58 PM
JimLev JimLev is offline
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Quote:
Originally Posted by Trebbia View Post
What bad happens if the OP just unplugs the aux water pump wires?

To the OP the electrical water pump is on the bottom of the radiator nearer to the driverside and on the inside bottom.

I don't know where the wire plugs into the harness though.
-----------------------------
On the 540 the coolant pump should be on the drivers side lower strut tower.
I was suggesting unplugging it to see if the current would drop down and not blow the fuse.
Nothing bad will happen by unplugging it.
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  #14  
Old 12-22-2011, 04:43 PM
blrot blrot is offline
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Trebbia and Jim: I spoke with the Tech and that was something we discussed and he planned to unplug it and see, but had some other pressing matters to tend to and won't get back to my car until Friday. It's not my daily driver, so I'm in no real hurry. I'll post updates and hopefully a resolution tomorrow!!
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  #15  
Old 12-27-2011, 07:08 PM
blrot blrot is offline
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Location: River Vale, NJ
 
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Got the call this afternoon that the culprit was located! It is, as he suspected, in the wires powering the aux water heater. The problem wire was in the harness near the firewall. Power is now reaching the aux water pump!! The new pump will be installed tomorrow! It's not known if the pump fried the wiring, or the other way around!

Gentlemen!!! Thank you very much for your helpful insight and you guys were right on the money!!
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  #16  
Old 03-19-2013, 07:52 AM
siddly siddly is offline
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Great help!, thanks guys.
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  #17  
Old 03-19-2013, 10:41 AM
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bluebee bluebee is offline
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Location: San Jose, California
 
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Quote:
Originally Posted by blrot View Post
Got the call this afternoon that the culprit was located! It is, as he suspected, in the wires powering the aux water heater. The problem wire was in the harness near the firewall. Power is now reaching the aux water pump!! The new pump will be installed tomorrow! It's not known if the pump fried the wiring, or the other way around!

Gentlemen!!! Thank you very much for your helpful insight and you guys were right on the money!!
Snap a photo by way of appreciation.
__________________
Please read the suggested threads, where the best always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #18  
Old 01-31-2014, 07:36 PM
oscarmanny oscarmanny is offline
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Thank you Guys for this post fixed my issue i was about to buy a new CCU saved me some bucks thanks a bunch hopefully my fuse won't blow
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  #19  
Old 10-03-2014, 10:57 PM
Gusrenus Gusrenus is offline
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Mein Auto: 2001 540, 2013 528
Thanks to all

I just want to say THANKS to those contributing. My Climate control shut down completely today. No fuse blow. I wiggled the #9 fuse and the sysem came on the stopped. Wiggled again - system on then the fuse burned out. The thread lead me to the aux water pump were I saw the wire insulation had turned brittle and discovered they were shorting. I separated the wires and problem solved. I never would have looked to the aux water pump as a possible problem unless it had been for this thread. Just wanted to say thanks.
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