2 Strange Electrical Problems - Any Ecperts???
#1
Wil Cooksey #256
Thread Starter
2 Strange Electrical Problems - Any Ecperts???
I have a 2008 Z06. I was involved in a fender bender that required a LF fender and left door (not reskinned, replaced entire door).
Problem 1: When I picked the car up after it was fixed I noticed the mirrors would not come to the correct position so I thought memory had been lost and I would program them later. Well, I can't program them at all. I press and hold memory 1 and I just get one beep. I've tried this with engine off, engine on, acc mode, brake on, brake off - all combinations and the same just one beep. I cam manually set the mirrors fine. Another strange thing is that when I press a memory the left buttom the mirror just moves out (or in, depending on where it was).
Problem 2: Just started a couple weeks ago. When I walk up to the car the doors won't open. I press unlock on the FOB with no response. I've even walked all the way around the car pressing the unlock button. No response. I take the key out of the FOB and open the hatch and pull the cord. The door pops open and the alarm goes off. As soon as I touch the door to open it, the alarm stops and the FOB works. I even tried it from a distance (50 ft) and it would lock and unlock the doors. I drove it off and on for about 6 hours and the FOB worked. I parked the car in the garage and two days later, same thing, FOB wouldn't work until after the car "woke up"..
Dealership has no idea about problem !, they haven't looked at problem 2 yet.
Anyone had problems like these???
Problem 1: When I picked the car up after it was fixed I noticed the mirrors would not come to the correct position so I thought memory had been lost and I would program them later. Well, I can't program them at all. I press and hold memory 1 and I just get one beep. I've tried this with engine off, engine on, acc mode, brake on, brake off - all combinations and the same just one beep. I cam manually set the mirrors fine. Another strange thing is that when I press a memory the left buttom the mirror just moves out (or in, depending on where it was).
Problem 2: Just started a couple weeks ago. When I walk up to the car the doors won't open. I press unlock on the FOB with no response. I've even walked all the way around the car pressing the unlock button. No response. I take the key out of the FOB and open the hatch and pull the cord. The door pops open and the alarm goes off. As soon as I touch the door to open it, the alarm stops and the FOB works. I even tried it from a distance (50 ft) and it would lock and unlock the doors. I drove it off and on for about 6 hours and the FOB worked. I parked the car in the garage and two days later, same thing, FOB wouldn't work until after the car "woke up"..
Dealership has no idea about problem !, they haven't looked at problem 2 yet.
Anyone had problems like these???
Last edited by 50 4Ever; 09-14-2016 at 03:50 PM.
#3
Wil Cooksey #256
Thread Starter
#4
Melting Slicks
Did you have a passenger with you when the fender bender happened?
Here's the reason behind my question. If someone on the pass. side braced their foot against the floor board, they are liable to dislodge the connection points on the BCM behind the carpet just under the dash panel.
Check out the blue colored connectors and make sure they are tightly installed.
Here's the reason behind my question. If someone on the pass. side braced their foot against the floor board, they are liable to dislodge the connection points on the BCM behind the carpet just under the dash panel.
Check out the blue colored connectors and make sure they are tightly installed.
#5
Racer
ExtraPilot has a good point, but if there was no passenger I have another thought. You stated they replaced the entire left door. Having recently replaced the left door on mine, I can attest to some weirdness if the wiring harnesses are not exact, not pinched, and of the same year. I think I would take it back to the shop where the repair was completed and request them to remove the door panel and check all the wiring and connectors. It is possible they damaged the memory input module when removing the connector and/or have something not connected completely. Your mirror switch functions, but the memory controls don't...and that was the door they just worked on. I would start with the wiring that was most recently replaced/moved.
The following users liked this post:
Landru (09-15-2016)
#6
Melting Slicks
ExtraPilot has a good point, but if there was no passenger I have another thought. You stated they replaced the entire left door. Having recently replaced the left door on mine, I can attest to some weirdness if the wiring harnesses are not exact, not pinched, and of the same year. I think I would take it back to the shop where the repair was completed and request them to remove the door panel and check all the wiring and connectors. It is possible they damaged the memory input module when removing the connector and/or have something not connected completely. Your mirror switch functions, but the memory controls don't...and that was the door they just worked on. I would start with the wiring that was most recently replaced/moved.
and the memory module could of been damaged on impact?
#7
Wil Cooksey #256
Thread Starter
Did you have a passenger with you when the fender bender happened?
Here's the reason behind my question. If someone on the pass. side braced their foot against the floor board, they are liable to dislodge the connection points on the BCM behind the carpet just under the dash panel.
Check out the blue colored connectors and make sure they are tightly installed.
Here's the reason behind my question. If someone on the pass. side braced their foot against the floor board, they are liable to dislodge the connection points on the BCM behind the carpet just under the dash panel.
Check out the blue colored connectors and make sure they are tightly installed.
#8
Wil Cooksey #256
Thread Starter
ExtraPilot has a good point, but if there was no passenger I have another thought. You stated they replaced the entire left door. Having recently replaced the left door on mine, I can attest to some weirdness if the wiring harnesses are not exact, not pinched, and of the same year. I think I would take it back to the shop where the repair was completed and request them to remove the door panel and check all the wiring and connectors. It is possible they damaged the memory input module when removing the connector and/or have something not connected completely. Your mirror switch functions, but the memory controls don't...and that was the door they just worked on. I would start with the wiring that was most recently replaced/moved.
#9
Wil Cooksey #256
Thread Starter
#10
Considering that we may be talking New modules on the GM can bus that replaced old modules, was the the car reprogrammed to mate up with the new modules with each other?
#11
Melting Slicks
See post #10;
https://www.corvetteforum.com/forums...d-mirrors.html
But as AL_JAZZ has said, it's more likely a issues with the last repairs done with regards to the body work and replacement of the door. They might of missed a wire or connected a dirty plug together or something to the affect.
#12
Racer
I replaced my left door and the memory module refused to work. The original harness was partially melted from the heat, yet it worked with it. The new door did not come with a harness and I had ordered it separately. I ordered a second harness and when installing it, I had to change the side impact airbag module plug out with the original partially melted harness to mate with the module from the replacement door. Then the passenger window would go down from the drivers door control but only up from the passenger control. I replaced the drivers power window module and now mirrors, windows, and memory all function correctly. Why I originally stated it as weirdness. Seems all the stars have to align in the right order and everything works with no airbag lights. As a side effect, I am now an expert at pulling the drivers side interior panel and putting it back on.
#13
Melting Slicks
I replaced my left door and the memory module refused to work. The original harness was partially melted from the heat, yet it worked with it. The new door did not come with a harness and I had ordered it separately. I ordered a second harness and when installing it, I had to change the side impact airbag module plug out with the original partially melted harness to mate with the module from the replacement door. Then the passenger window would go down from the drivers door control but only up from the passenger control. I replaced the drivers power window module and now mirrors, windows, and memory all function correctly. Why I originally stated it as weirdness. Seems all the stars have to align in the right order and everything works with no airbag lights. As a side effect, I am now an expert at pulling the drivers side interior panel and putting it back on.
#14
Wil Cooksey #256
Thread Starter
Got some news from the dealer today:
problem #1 turns out to be some module in the mirror
problem #2 was a low battery in the remore.
Thanks guys for the help
problem #1 turns out to be some module in the mirror
problem #2 was a low battery in the remore.
Thanks guys for the help
The following users liked this post:
Landru (09-17-2016)
#15
Heel & Toe
Driver''s seat will not retain entry memory positions
My driver's seat will remember all exit positions, but will not return the seat forward after entering and starting up. Anyone else experienced this?
#16
Wil Cooksey #256
Thread Starter
#17
Heel & Toe
mine was set to move seat forward and down, the steering wheel came out, and mirrors went into place. All of that happened when I started the car since the key FOB was programmed with the memory. I never use the button except when setting the memory. I have the memory recall turned on in the DIC. When the seat quit going forward I disconnected then reconnected the seat connector and reset the memory. It seems to be working fine now.
#18
Wil Cooksey #256
Thread Starter
mine was set to move seat forward and down, the steering wheel came out, and mirrors went into place. All of that happened when I started the car since the key FOB was programmed with the memory. I never use the button except when setting the memory. I have the memory recall turned on in the DIC. When the seat quit going forward I disconnected then reconnected the seat connector and reset the memory. It seems to be working fine now.
One minor point, there is no memory in the FOB, each FOB has a unique ID. When you touch the touchpad to open the door, the computer sends out a request that FOB's in the area will answer. The FOB will answer with it's ID, from then on the car knows what number FOB. Only the first two FOB's can be programmed into the memory function. the other two FOB's will do everything but activate the memory function.
I don't have my memory set-up like yours since I can't reach the clutch until the seat has been moved.
Last edited by 50 4Ever; 09-28-2016 at 09:06 PM.
#19
Heel & Toe
[QUOTE=50 4Ever;1593150679]One thing I've noticed on mine is an intermittent problem after I press the button the seat does not move. Only happens like once in 50 times. I just manually move the seat a little and press the memory button on the door. Then the seat moves to the proper position. To verify you do not have this problem, do things as normal. When the seat doesn't move, manually move the seat forward a bit then press the corresponding memory button on the door. If the seat does not move you don't have the same problem.
One minor point, there is no memory in the FOB, each FOB has a unique ID. When you touch the touchpad to open the door, the computer sends out a request that FOB's in the area will answer. The FOB will answer with it's ID, from then on the car knows what number FOB. Only the first two FOB's can be programmed into the memory function. the other two FOB's will do everything but activate the memory function.
I don't have my memory set-up like yours since I can't reach the clutch until the seat has been moved.
Thanks. Good info to know for next time I have this problem.
One minor point, there is no memory in the FOB, each FOB has a unique ID. When you touch the touchpad to open the door, the computer sends out a request that FOB's in the area will answer. The FOB will answer with it's ID, from then on the car knows what number FOB. Only the first two FOB's can be programmed into the memory function. the other two FOB's will do everything but activate the memory function.
I don't have my memory set-up like yours since I can't reach the clutch until the seat has been moved.
Thanks. Good info to know for next time I have this problem.
#20
Wil Cooksey #256
Thread Starter
Update on memory mirror problem:
Finally got it fixed, it turned out to be the mirror. The dealer ordered a mirror from GM, it didn't fix the problem. They were involved with GM'' Tech and thought it was a bad mirror. Ordered another one, didn't work either. Swapped mirrors with a similar Corvette on the used car lot and it worked fine. They put the new mirror on the used Corvette and the memory function would not wort. GM put the dealer in touch with the supplier. They hand built a mirror and tested it out, then FedExed it to dealer. Put the mirror on my car and it worked perfectly.
Thanks to GM, the supplier and the dealer (Performance Chevrolet, Sacramento CA) for getting to the bottom of this problem.
Finally got it fixed, it turned out to be the mirror. The dealer ordered a mirror from GM, it didn't fix the problem. They were involved with GM'' Tech and thought it was a bad mirror. Ordered another one, didn't work either. Swapped mirrors with a similar Corvette on the used car lot and it worked fine. They put the new mirror on the used Corvette and the memory function would not wort. GM put the dealer in touch with the supplier. They hand built a mirror and tested it out, then FedExed it to dealer. Put the mirror on my car and it worked perfectly.
Thanks to GM, the supplier and the dealer (Performance Chevrolet, Sacramento CA) for getting to the bottom of this problem.
Last edited by 50 4Ever; 10-13-2016 at 08:18 PM.