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Mad Mike
Mad Mike, ASE Certified Technician
Category: Car
Satisfied Customers: 258
Experience:  20 years experience, all makes and models.
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My 2002 Olds Bravada All Wheel Drive is not working. I have

Customer Question

My 2002 Olds Bravada All Wheel Drive is not working. I have checked All Wheel Drive fuse under seat and the two under the hood, which all look good. Had same problem few years back and thought they told me it was a fuse they replaced!
Submitted: 4 years ago.
Category: Car
Expert:  Mad Mike replied 4 years ago.

Hello, my name is XXXXX XXXXX welcome to JA.

 

The involved fuse may be the transfer case control module fuse (TCCM). This fuse is in the underhood fuse block and is labeled ATCM or TREC.

 

If this fuse is good, remove it for 30 seconds and then re-install it. This may wake up the AWD module and cause it to work again. If that is the case, any GM dealer can upgrade the software in the TCCM which should prevent this from happening again.

 

If this doesn't wake up the module, let me know and we can continue.

 

Thanks,

Mike

Customer: replied 4 years ago.
Should the engine be running, when I pull the fuse.
Expert:  Mad Mike replied 4 years ago.

Valid question!

 

I should have specified engine off/key off.

 

It's better to do things which interrupt power with the key off. Also, some devices can get power from a second source when the key is on.

 

Mike

 

Customer: replied 4 years ago.
I have a fuse marked ATC, not ATCM in position 8. There are not TREC fuses. Should I try removing the ATC fuse?
Expert:  Mad Mike replied 4 years ago.

Yes. They are really good at having 12 different terms for the same thing.

 

Mike

Customer: replied 4 years ago.
Mike,
Pulled ATC for 30+ seconds. Tried to spin tires and only the rears through any snow up!!
Expert:  Mad Mike replied 4 years ago.

Well, bummer.

 

There are a couple ways we can go with this now. The best thing that would help diagnose this would be to have it scanned for chassis codes. I'm not sure how I can advise you best to go about getting that though. Many parts stores offer to "scan" vehicles for codes, but they often cannot access chassis codes, only powertrain codes.

 

Another thing you could do is to check the fluid and see what it looks like. If it's really low, or really burned, then there is likely an internal problem.

 

It's either electrical, or mechanical. So we really need to know if there's a chassis code.

 

Mike

Customer: replied 4 years ago.
Advance Auto Parts are willing to hook it up, but said nothing may show due to the check engine lite not being on. Auto Zone said with check engine lite on, they could not hook it up.

since you told me to leave the fuse out for 30 seconds, should I go back and remove the other 3 fuses for 30 seconds each? I am having dinner, then will go to Advanced Auto and let them hook it up to see, if anything shows up.
Expert:  Mad Mike replied 4 years ago.

That is the fuse for the module, so if it was going to work, that should have done it.

 

How many miles are on the vehicle?

 

Mike

Customer: replied 4 years ago.
107,000 and this happened once before in the winter. That is why I knew it was something to do with a fuse.
Expert:  Mad Mike replied 4 years ago.

Did it work fine recently? or has it not worked all winter?

 

Mike

Customer: replied 4 years ago.
I believe it was working in the last snow fall in January 2010.
Expert:  Mad Mike replied 4 years ago.

One last question. The last time this happened, did you take it to a GM dealership, or an aftermarket facility?

 

Mike

Customer: replied 4 years ago.
I took it to the Chevy dealer I purchased it from and they were the one's who told me it was a fuse problem!
Customer: replied 4 years ago.
Mike,
funny the window popped up saying I had a response to the above, but nothing was here??
Expert:  Mad Mike replied 4 years ago.

The site acts up from time to time, but it's harmless.

 

Ok, I only wondered about the dealer because there are a lot of bulletins pertaining to new software for the awd module. The most recent revision seems to be around 2006.

 

If the last visit was under warranty, I might be able to see what was done by entering the VIN#. If it wasn't under warranty, it would be important to know if the module was programmed.

 

Mike

 

 

Customer: replied 4 years ago.
I tried to have them look it up, but they could not find it on there computers and all techs had left due to the snow storm. I can look in my file tomorrow to see what the invoice says.
Expert:  Mad Mike replied 4 years ago.

If you'd like me to check the VIN, I could do that. It would also allow me to see what the latest software revision is, so you could compare to the repair date.

 

Mike

Customer: replied 4 years ago.
VIN #1GHDT13S122271159 AND THE LAST REPAIR FOR THIS PROBLEM COULD HAVE BEEN 2006.
SHOULD I TAKE IT TO THE PARTS STORE TO BE SCANNED?
Expert:  Mad Mike replied 4 years ago.

R.O Date

R.O Number Type Labor Operation Odometer Reading
12/27/2004 038188 # V1265 - 04087 - INSPECT AND REPLACE ONE OR BOTH TAIL LAMP CIRCUIT 44033 miles
10/15/2004 102974 # V1115 - 04005 - INSPECT WSW MODULE AND INSTALL SEAL ASSEMBLY 41515 miles
10/15/2004 102974 # V1167 - 04037 - INSPECT SEAT BELT RETRACTORS, NO FUTHER ACTION REQ 41515 miles
03/22/2004 182793 # B4161 - OUTSIDE REARVIEW MIRROR MOTOR REPLACEMENT - LEFT SIDE 35921 miles
03/22/2004 182793 # B1783 - WINDSHIELD WIPER BLADE REPLACEMENT 35921 miles
12/22/2003 180516 # N5510 - MODULE, MEMORY SEAT - REPLACE 32487 miles
08/11/2003 177128 # L1225 - FUEL TANK FUEL PUMP MODULE REPLACEMENT - LEFT SIDE 26522 miles
08/11/2003 177128 # J3390 - FAN CLUTCH REPLACEMENT 26522 miles
07/28/2003 176704 # C4880 - LIFTGATE INSIDE PULL HANDLE REPLACEMENT 25809 miles
06/27/2003 175782 # K4290 - TRANSFER CASE OIL DRAIN OR FILL PLUG REPLACEMENT 23485 miles
06/23/2003 175782 # V0994 - 03012-INSTALL PLUG AND REMOVE OVERRIDE LEVER 23458 miles
06/23/2003 175782 # V0995 - 03013-REPROGRAM IP CLUSTER 23458 miles
05/12/2003 174759 # N2328 - SWITCH - IGNITION/KEY WARNING - REPLACE 21954 miles
05/12/2003 174759 # T2020 - TOWING 21954 miles
05/12/2003 174759 # B1785 - REAR WINDOW WIPER ARM REPLACEMENT 21954 miles
04/29/2003 174400 # K4122 - TRANSFER CASE SHIFT CONTROL MODULE REPLACEMENT 21530 miles
09/22/2002 194992 D B4156 - OUTSIDE REARVIEW MIRROR REPLACEMENT - LEFT SIDE 11181 miles
09/22/2002 194992 # B4156 - OUTSIDE REARVIEW MIRROR REPLACEMENT - LEFT SIDE 11181 miles
07/10/2002 166994 # J6360 - POWERTRAIN CONTROL MODULE REPLACEMENT 6943 miles
07/10/2002 166994 # K4155 - VEHICLE SPEED SENSOR REPLACEMENT 6943 miles
06/03/2002 188392 # V0852 - INSTALL NEW FUEL FILTER QUICK CONNECT RETAINERS 5494 miles
09/27/2001 A71159 I Z7000 - PRE-DELIVERY INSPECTION - BASE TIME 0 miles


This is alll I show for repair history, so anything after 2004 isn't there. I put the VIN in to see what the latest calibration is, but there are a bunch of part numbers for the modules, so I cannot determine.

 

I think that if the parts store isn't too inconvenient, it would be worth a try. Just make sure they know to look for chassis codes in the transfer case module.

 

Mike

Customer: replied 4 years ago.
OK,
I WILL TRY THEM IN THE MORNING AS THE SNOW IS GETTING DEEP HERE. IF I ACCEPT WILL WE STILL BE ABLE TO WORK ON THIS TOMORROW OR DO I NEED TO LEAVE IT OPEN?
Expert:  Mad Mike replied 4 years ago.

You don't need to accept until you're ready. If you do accept, I will keep the question open until I'm sure that you don't need anything else.

 

Mike

Customer: replied 4 years ago.
MIKE,
I TOOK IT TO THE PARTS STORE AND THEY SAID THEIR SCANNER WOULD ONLY WORK WITH CHECK ENGINE LIGHT ON. I LOOKED AT THE REPAIR RECORD AND IT DOES NOT LOOK LIKE WHAT WE HAVE HAD DONE ON OUR CAR?? BUT THE VIN # XXXXX PUT IN IS CORRECT. ANY THING ELSE YOU CAN THINK OF BEFORE I TAKE IT TO THE DEALER?
I AM HEADING TO MY OFFICE TO SEE, IF I HAVE THE REPAIR RECEIPT.

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