If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
1996 740iL won't start, related to the Key
I have a strange problem:
Try to start the car with the key usually used, won't start. Put in our backup key, starts fine. Turn car off, put backup key 30 feet away, come back and can start car with first key. Turn off car, come back later (say 10 minutes) and first key won't start car again. My understanding is that a coil around the ignition tumbler transmits energy to a "chip" in the key which answers back with an ID code. This enables the EWS system to start the car. Once it starts, I THINK a new code is sent from the car to the key for storage till the next start. If that is true, how come it won't start the first time, but will after using the second key ? This all started during troubleshooting a trunk closing problem. I had unhooked the battery several times and the A1 module. I don't know if this is related or a coincidence, but there is no other issues with the car I know of. I have seen a programming sequence for the remote on the keys, but wonder if there is a similar intialization routine for the chip in the key. I would imagine this same system is used in all the BMW of this vintage. Thanks for your help. -- Jim Collins Sammamish, WA |
Ads |
#2
|
|||
|
|||
"Jim Collins" <rubidium7atcomcast.net> wrote in message ews.com... >I have a strange problem: > Try to start the car with the key usually used, won't start. Put in our > backup key, starts fine. Turn car off, put backup key 30 feet away, come > back and can start car with first key. Turn off car, come back later > (say 10 minutes) and first key won't start car again. > > My understanding is that a coil around the ignition tumbler transmits > energy to a "chip" in the key which answers back with an ID code. This > enables the EWS system to start the car. Once it starts, I THINK a new > code is sent from the car to the key for storage till the next start. If > that is true, how come it won't start the first time, but will after > using the second key ? > > This all started during troubleshooting a trunk closing problem. I had > unhooked the battery several times and the A1 module. I don't know if > this is related or a coincidence, but there is no other issues with the > car I know of. I have seen a programming sequence for the remote on the > keys, but wonder if there is a similar intialization routine for the > chip in the key. > > I would imagine this same system is used in all the BMW of this vintage. > > Thanks for your help. > -- > Jim Collins > Sammamish, WA I believe the sequence you are referring to about programming the remote on the keys is the same process for teaching the key itself to the car. Give it a try. Kyle. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
2004 330 xi wouldn't start in the cold | Nick Pemberton | BMW | 7 | December 21st 04 11:04 PM |
156 start problems ?! | Canonian | Alfa Romeo | 15 | December 8th 04 08:57 AM |
URGENT - 1996 740IL Traction Control | John Moriarity | BMW | 2 | November 27th 04 06:32 AM |
156 2.0TS hot start problem | edster | Alfa Romeo | 3 | August 8th 04 12:26 PM |
Problems with 1996 A4 | John Young | Audi | 2 | June 4th 04 07:44 PM |