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Intermittent problem

Mr.Cool

Well-known member
Joined
May 5, 2002
Messages
152
Location
NW Florida
Corvette
2005 Magnetic Red Coupe / 82 Silver Green
My 2000 coupe has developed a problem where the keyless entery ceases to fuction, at the same time the DIC will display the tire pressure monitor sys message or it will tell me one of my tires is flat when it wasn't. I drove the car this weekend trying to determine how to get the problem to show itself so I could inform the service writer. I've determined that the car needs to be run for 30 to 40 minutes to get the problem to show itself. A 30 minute cool off and the problem clears up. Right now the car is in the shop having the Body Control Module replaced. No codes were displayed for this module but the Remote Function Actuator had numerous codes. I guess we shall see if this fixes it.
 
J

John L

Guest
I've had a problem with my keyless entry that I never could pin down. I swear that the following is true, weird, but true. One evening about a year ago I went to pick up my date in Jacksonville, FL. I remotley locked the car when I went up to get her. When I returned to the car with her the key fob failed to function. Throughout the rest of the evening, no remote function would work. I took her home, parked the car (had to lock it manually) and went in for a bit. Returned and the keyless entry functioned normally. It was fine for the next few days. I checked for codes and none had set. The system worked perfectly until (you guessed it) I had another date with the same girl. Again, it failed to function with her around the car. It has repeated this scenario each and every time we have been out. It just will not work with her in or around the vehicle. Once she gets "out of range", all returns to normal. My dealer got a kick out of it when I reported it to them (they think I'm kidding). A couple times I had to reset the the fobs using the DIC to get them to work again, but usually they will begin normal operation on their own once she is "out of the picture". Hope your problem will be remedied by the replacement of you BCM. I'm afraid mine is going to require replacement of something else to fix mine.
 

Gorgon

Well-known member
Joined
Jul 15, 2002
Messages
1,040
Location
Philadelphia, PA
Corvette
None
John, your fob does not work around her because she has to have some kind of transmitter with her that is radiating in the same band as the one used by your fob. The fob operates on a radio frequency band which I believe is close to 430 MHz. What does she have that would cause this to happen? Typical cell phone and pagers operate at a much higher frequency. Perhaps she had a fob in her purse where something was pushing against the buttons and it is jamming the signal from your fob. Have her leave her purse or anything she is carrying in the house and she if it has the same affect. There's some explanation and I'm not buying the alien example. ;)
 
J

John L

Guest
That's interesting information. I hadn't thought of a frequency conflict. She always has her cell phone and her pager with her. I'm not sure if she carries a fob for her ricer or not, I'll find out, and about any other electronics she might be packing around. This has been damn mystyifying! Thanks for the reply.
 
D

Drewser

Guest
eether--uhhh--eyether

Your girlfriend either has an electric personality or your car is Christine. I would dump the girl--cheaper alternative.:D

I had a similar problem with my fob--ok, maybe not so similar. My wifes fob has never had any problems. Mine, on the other hand has failed a few times. Mine fails on the golf course. It works fine in the morning, but when I finish playing the passive AND the hatch/unlock buttons quit working. I reset each time and still it quits on the course. I took it back to the dealer and he replaced it with a new one and I haven't had the problem since so we shall see if that was the problem.
--Drew:w
 

Mr.Cool

Well-known member
Joined
May 5, 2002
Messages
152
Location
NW Florida
Corvette
2005 Magnetic Red Coupe / 82 Silver Green
John

Wow that is pretty weird and my service writer thought I was crazy. Still no car back yet. I hope I get by the weekend.
 

Mr.Cool

Well-known member
Joined
May 5, 2002
Messages
152
Location
NW Florida
Corvette
2005 Magnetic Red Coupe / 82 Silver Green
Well I got my car back Monday but did not get a chance to give it a good warm up drive until this weekend. I still have the same problem the RKE stops working and so does the tire pressure monitoring system after a 45 minute drive. I let the car sit for 15- 30 minutes and everything is fine. I guess it's back to the dealership again. C4C5 specialist have you run across anything like this?
 

c4c5specialist

Technical Advisor
Joined
May 29, 2001
Messages
3,682
Location
New Haven, Ct. USA
Corvette
Nope, but someday.
Hi there,
Based on what you have posted, I can only speculate. I dont know if you have any codes here, however, I would check them.
Do you see XXX on all the tire pressure readings??????
Is there anything about the service tire pressure monitoring systems??????
If not, I would suggest that your receiver is bad.
Please post codes in specifically the RFA, and the BCM.
Besttoyou, c4c5:hb
 

Mr.Cool

Well-known member
Joined
May 5, 2002
Messages
152
Location
NW Florida
Corvette
2005 Magnetic Red Coupe / 82 Silver Green
This is the 3rd trip back for this problem. The first time they replaced the key fob transmitter. On the second trip the bcm was replaced.
This time when the ser tire mon sys display came on I hit the reset then checked the tire pressures all showed blank. Just before arriving home I checked them again one front showed the correct pressure and the other had xxx one rear had the correct pressure and the other had xxx. On a previous occasion I was getting a flat tire warning every couple of minutes when there was no flat tire.
On the second trip to the dealership the service writer saw the display show 0 pressure in the left rear tire then go back to the correct pressure. That was the tire the computer was telling me was flat on a previous drive.
The BCM has no codes the RFA has seven codes
U 1096 H
U 1064 H
U 1016 H
C 2105 H
C 2110 H
C 2115 H
C 2120 H
One other thing I noticed is all of my FM radio presets where erased but my AM presets were unchanged. This is the first time that happened.

Thankyou very much for your attention.

Tom
 
V

vettepilot

Guest
Sounds like you lost all electrical power momentarily ... but I'm just grasping for straws. Maybe a loose or oxidized batt connection, or oxidized connection to the computer.
Maybe it's your girlfriends perfume, I have had women walk by me wearing perfume that caused MY RKE to malfunction...
I think the electronic interferance is a good place to begin looking.
vettepilot
 

c4c5specialist

Technical Advisor
Joined
May 29, 2001
Messages
3,682
Location
New Haven, Ct. USA
Corvette
Nope, but someday.
Hi there,
Your 2120 in your RFA, is the key here.
This shows a tire pressure monitoring failure within the RFA system.
Now, your first course of action is to reprogram the tire pressure monitoring sensors. If you can program the sensors, the next step would be to test drive the car for 20 mins. Then, check to see if the code resets.
Please let us know the results, c4c5:hb
 

Mr.Cool

Well-known member
Joined
May 5, 2002
Messages
152
Location
NW Florida
Corvette
2005 Magnetic Red Coupe / 82 Silver Green
C4C5 specialist
Thanks for your reply. I just returned from an 1 1/2 hour drive in stop and go traffic. Vettepilot mentioned electronic interference so I left the cell phone home. I had no problems with the RKE nor did I get the Ser tire mon sys message. I did however receive the left rear tire flat warning when it had 32 psi. Can most of my problem be a simple as rf interference? I guess we shall see. It's going to the dealer tomorrow. I guess I'll have them concentrate on the flat tire warning for now.
 

Mr.Cool

Well-known member
Joined
May 5, 2002
Messages
152
Location
NW Florida
Corvette
2005 Magnetic Red Coupe / 82 Silver Green
C4 C5 specialist

The tire pressure sensors have been reprogrammed and all codes cleared. I've been instructed to drive the vehicle with no aftermarket electronic devices. If the problem does not recur then I can reintroduce my gizmos one at a time.

Thanks
Tom
 

Rons98

Member
Joined
Apr 17, 2002
Messages
7
Location
Palm Bay, FL, USA
Corvette
1998 Torch Red Coupe, 1992 Teal Coupe
I had a similar intermittent problem on my '98. Sometimes the keyless entry fob would work, sometimes it wouldn't. Seemed to come and go with temperature changes. Ditto for the tire pressure readings. My dealer finally located the problem on the second attempt. It was the PKE receiver in the car that receives both the key fob signals and the tire pressure signals. After the unit was replaced, the problem never returned.
 

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