Lost my FOB Functions When I disconnected the Battery
02-21-2017, 07:56 PM
#1
Racer
Thread Starter
Lost my FOB Functions When I disconnected the Battery
I can't get my FOB to lock and unlock my car. I have a 1997 Coupe. Can you suggest what to do. Thanks
02-21-2017, 10:26 PM
#3
Racer
Thread Starter
Before you go through the reprogram process try standing in front of the car and press both the lock and unlock buttons at the same time until the horn honks. Once the horn honks the FOB's should work again. Common issue on the 97 - 2000 C5's and their keyless entry system 
. Same problem does NOT exist on the 2001 - 2004 keyless entry system.
. Same problem does NOT exist on the 2001 - 2004 keyless entry system.
02-21-2017, 10:57 PM
#4
Before you go through the reprogram process try standing in front of the car and press both the lock and unlock buttons at the same time until the horn honks. Once the horn honks the FOB's should work again. Common issue on the 97 - 2000 C5's and their keyless entry system . Same problem does NOT exist on the 2001 - 2004 keyless entry system.
. Same problem does NOT exist on the 2001 - 2004 keyless entry system.I've unhooked mine probably 15 times or more since June and never lost a thing on my 2003 yet. I'd still like to know the reason or how they fixed it.
And yes I still like the little Puke Guy.
Last edited by Rabbitman; 02-21-2017 at 10:58 PM.
02-22-2017, 11:18 AM
#5
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St. Jude Donor '08
When you disconnect the battery ALL MEMORY functions default to the factory preset settings. You have to reset all of them manually to your liking and depress the MEM Function on the door (If you have memory) to set it to that FOB. All C5 have MEM-1, MEM-2 and MEM-3, You can program a third FOB (depress MEM-1 & MEM-2 at the same time.
ALSO,,, When you disconnect the battery ALL of your emission status ready flags get set to NOT READY and you have to complete a number of complete drive cycles to make them ready again. You can NOT pass emissions until the emission status is ready.
BC
ALSO,,, When you disconnect the battery ALL of your emission status ready flags get set to NOT READY and you have to complete a number of complete drive cycles to make them ready again. You can NOT pass emissions until the emission status is ready.
BC
Last edited by Bill Curlee; 02-22-2017 at 11:19 AM.
02-22-2017, 01:09 PM
#6
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St. Jude Donor '08
HMMMM,,,,,,,, When I disconnect the battery in the 02 Z my HVAC goes to the DEFORST Setting and several other things have to be reset.
02-22-2017, 07:37 PM
#7
[QUOTE=Bill Curlee;1594149718]When you disconnect the battery ALL MEMORY functions default to the factory preset settings. You have to reset all of them manually to your liking and depress the MEM Function on the door (If you have memory) to set it to that FOB. All C5 have MEM-1, MEM-2 and MEM-3, You can program a third FOB (depress MEM-1 & MEM-2 at the same time.
ALSO,,, When you disconnect the battery ALL of your emission status ready flags get set to NOT READY and you have to complete a number of complete drive cycles to make them ready again. You can NOT pass emissions until the emission status is ready.
BC[/QUOTE
That's good to know about the 3 key fobs. I bought 2 on Ebay the other week and programmed the original and the 1 new one, I didn't know at the time you could actualy do 3, I will be doing it.
ALSO,,, When you disconnect the battery ALL of your emission status ready flags get set to NOT READY and you have to complete a number of complete drive cycles to make them ready again. You can NOT pass emissions until the emission status is ready.
BC[/QUOTE
That's good to know about the 3 key fobs. I bought 2 on Ebay the other week and programmed the original and the 1 new one, I didn't know at the time you could actualy do 3, I will be doing it.