Key FOB not detected
Thread Starter
Melting Slicks
Joined: Apr 2007
Posts: 2,168
Likes: 242
From: Pittsburgh PA
Key FOB not detected
Been having an issue for the past week or so with the key fob randomly not being detected, I replaced the battery in the key fob and it didn't really change anything.
Yesterday going to lunch with a coworker it wouldn't recognize the keyfob for passive unlock or to start the car. I was able to lock/unlock the doors via the remote buttons but car wouldn't start until I put it in the slot on the steering column, with it there the car ran without a problem. Got home and threw the car on my battery tender which was reading fully charged before bed, my passive unlock was working now but still didn't detect the fob in the car. I disconnected the negative terminal for a bit just for the fun of it but it didn't help.
Go to try it again this morning and I had to put key in the slot, hit the start button and got one weak crank and dimming lights, tried it again and the car fired up but was throwing a "Rear Axle system off" message. I turned the car off and decided to take the Volt to work.
Car is 3 weeks out of warranty or I would dump this on a dealer, I'm thinking replacing the car battery is my next logical step?
Yesterday going to lunch with a coworker it wouldn't recognize the keyfob for passive unlock or to start the car. I was able to lock/unlock the doors via the remote buttons but car wouldn't start until I put it in the slot on the steering column, with it there the car ran without a problem. Got home and threw the car on my battery tender which was reading fully charged before bed, my passive unlock was working now but still didn't detect the fob in the car. I disconnected the negative terminal for a bit just for the fun of it but it didn't help.
Go to try it again this morning and I had to put key in the slot, hit the start button and got one weak crank and dimming lights, tried it again and the car fired up but was throwing a "Rear Axle system off" message. I turned the car off and decided to take the Volt to work.
Car is 3 weeks out of warranty or I would dump this on a dealer, I'm thinking replacing the car battery is my next logical step?
Last edited by SK360; Oct 25, 2016 at 08:07 AM.
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
The weak crank and light dimming lends me to think that your car battery is close to dead. Your RKE sounds ok as you've changed the battery but still need the slot to start. The BCM is looking for the RKE and your car battery might be too weak to allow the BCM to function properly. Get it to a shop and have the battery load tested.
Here is the checklist to trouble shoot the RKE: http://www.ls2.com/boggs/c7/C7RKENot...dchecklist.pdf
Elmer
Here is the checklist to trouble shoot the RKE: http://www.ls2.com/boggs/c7/C7RKENot...dchecklist.pdf
Elmer
Thread Starter
Melting Slicks
Joined: Apr 2007
Posts: 2,168
Likes: 242
From: Pittsburgh PA
The weak crank and light dimming lends me to think that your car battery is close to dead. Your RKE sounds ok as you've changed the battery but still need the slot to start. The BCM is looking for the RKE and your car battery might be too weak to allow the BCM to function properly. Get it to a shop and have the battery load tested.
Here is the checklist to trouble shoot the RKE: http://www.ls2.com/boggs/c7/C7RKENot...dchecklist.pdf
Elmer
Here is the checklist to trouble shoot the RKE: http://www.ls2.com/boggs/c7/C7RKENot...dchecklist.pdf
Elmer
I figure the RCDLR is ok as the TPMS sensors do work and update while the car is running and I read a bad RCDLR will trip TPMS issues. I am going to grab a battery tonight and see what happens.
Last edited by SK360; Oct 25, 2016 at 09:32 AM.
Thread Starter
Melting Slicks
Joined: Apr 2007
Posts: 2,168
Likes: 242
From: Pittsburgh PA
Tried a new 2032 in the fob and it worked fine. Just replaced it 2 weeks ago and that battery is still showing 3.175v... maybe it's just weak under load.... not sure. Will see how long this lasts
Moderator emeritus
Joined: Jun 2001
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
Curious....
Did the other "new" battery have a cross-hatch pattern on it? One of the warnings on the "Replace the RKE battery" says to not use a battery with the cross-hatch pattern as it doesn't make contact properly with the RKE.
This is the warning: CR2032 Ray-o-vac with hatch is BAD, do not use.
Elmer
Thread Starter
Melting Slicks
Joined: Apr 2007
Posts: 2,168
Likes: 242
From: Pittsburgh PA
Curious....
Did the other "new" battery have a cross-hatch pattern on it? One of the warnings on the "Replace the RKE battery" says to not use a battery with the cross-hatch pattern as it doesn't make contact properly with the RKE.
This is the warning: CR2032 Ray-o-vac with hatch is BAD, do not use.
Elmer
Did the other "new" battery have a cross-hatch pattern on it? One of the warnings on the "Replace the RKE battery" says to not use a battery with the cross-hatch pattern as it doesn't make contact properly with the RKE.
This is the warning: CR2032 Ray-o-vac with hatch is BAD, do not use.
Elmer
Last edited by SK360; Oct 26, 2016 at 02:11 PM.
Heel & Toe
Joined: Jun 2017
Posts: 19
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From: Kuna, ID
reinforcing an important point herein
Curious....
Did the other "new" battery have a cross-hatch pattern on it? One of the warnings on the "Replace the RKE battery" says to not use a battery with the cross-hatch pattern as it doesn't make contact properly with the RKE.
This is the warning: CR2032 Ray-o-vac with hatch is BAD, do not use.
Elmer
Did the other "new" battery have a cross-hatch pattern on it? One of the warnings on the "Replace the RKE battery" says to not use a battery with the cross-hatch pattern as it doesn't make contact properly with the RKE.
This is the warning: CR2032 Ray-o-vac with hatch is BAD, do not use.
Elmer
