Thread: Key Fob probelm
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Old 06-08-2012, 09:50 AM
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QSilver7 QSilver7 is offline
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Location: Northeast Indiana
 
Join Date: Aug 2008
Posts: 5,628
Mein Auto: 1997 740iL / 2006 X5 4.4
The remote keys have 3 totally independent features that work in conjunction with one another...many owners get confused as to which one does what etc. and often times ascribe programming features for DWA/FZV to the EWS feature of the keys...which is incorrect. EWS programming is totally different than the programming/initalizing procedure for DWA/FZV features.

The remote keys contain:
  • EWS - immobilizing feature that shuts down fuel/spark/ignition until a recognized key (which has an EEPROM chip inside with an individual serial number (ISN) that matches the other EWS components. This feature is self powering (thru induction) and DOES NOT need the battery inside the key to start the car. Neither is it "programmable" by the procedure used to program the other features...it must be synced using proprietary software/hardware to the other EWS components.
  • DWA - anti-theft alarm siren system (requires the use of the battery inside the key)...this feature can be programmed by the owner using the procedure outlined below. This feature also allows the key to be programmed to other BMWs that use the same (RF) radio frequency.
  • FZV/FBZV - central locking system/keyless entry (requires the use of the battery inside the key)...this feature can also be programmed by the owner using the procedure outlined below. This feature also allows the key to be programmed to other BMWs that use the same radio frequency.

If the battery is dead or damaged inside the key...change it (old style key or new style key)...or recharge it (new style key) by inserting it into the ignition and turning the key to at least position 1 for up to 30 hours (if completely discharged). A dead key battery will interrupt the DWA/FZV functions...but the key should still be able to start the car.

If the key won't start the car...then there's an issue with EWS. Programming the key using the DWA/FZV initialization procedure will DO NOTHING to fix this issue. Since your 01 should have the new style remote key...if it's not starting the car, but the key fits the ignition and will turn to the start position...there's probably something wrong with the EEPROM inside the key...or it's out of sync with the other EWS components. You're going to need a dealer's help or find an Indy mech or other BMW owner that has the software/hardware to access the car's communication BUS system.


Here's the instructions I've posted many times on how to reprogram the old & new style remote keys. You MUST follow every instruction to the "T"...start the 2nd & successive remote keys on STEP 3...DO NOT insert the other remotes you're programming into the ignition...if you do, you'll cancel the 1st key's programming:




(EWS EEPROM (transponder chip) location inside the new style key)



(it can take up to 30 hours to fully recharge a completely discharged new style key)
(TIP: hook up battery charger to jump start location in engine bay, insert key & turn to position 1, charge over night)


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Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
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99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
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Last edited by QSilver7; 06-08-2012 at 09:54 AM.
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