TSB : Keyless Sys. - Remote Control And Comfort Access Inop.

Affected years: February 2012

Details

SI B66 02 11 Distance Systems, Cruise Control, Remote Control February 2012 Technical Service This Service Information bulletin supersedes SI B66 02 11 dated August 2011. [NEW] designates changes to this revision SUBJECT [NEW] Remote Control and/or Comfort Access Functionality Is Inoperative MODEL All [NEW] Vehicles with remote control keys that have a replaceable battery SITUATION The radio remote control and Comfort Access functionality is inoperative: ^ The vehicle can only be unlocked or locked with the mechanical key. ^ The vehicle can only be started with the remote control key in the slot of the Car Access System (CAS) or when held very closely to the steering column. CAUSE [NEW] The replaceable battery in the remote control key is either damaged or depleted. CORRECTION Step A: A defective/depleted battery in the remote control key will mimic that no battery is installed in the remote control key; hence, no check control message will be displayed. This is why it is imperative to test the battery in the remote control key first. [NEW] Testing showed that even when performing diagnosis and following the test plan for the key battery charge/voltage status check offered in ISTA, a damaged/depleted key battery will not be recognized. [NEW] As a result, follow the recommendation below without performing a vehicle test: 1. [NEW] Check the battery functionality by removing the original key battery in the key and install a known good key battery; or, even better, use a battery tester called state of charge (e.g., ZTS Multi-Battery Tester MBT-1) to test the key battery capacity 2. [NEW] Retest the functionality of the remote control key. 3. [NEW] When proper functionality is confirmed, replace the key batteries on all assigned remote control keys for the vehicle. 4. [NEW] If proper functionality cannot be restored with a known good key battery, refer to Step B. Note: The average life cycle of a battery in the remote control key is approximately 3 years from the day of production of the vehicle. [NEW] More details on the ZTS Multi-Battery Tester MBT-1 can be found in Attachment_A and on the ZTS manufacturer website, www.ztsinc.com/mbtl.html. [NEW] Note: The ZTS Multi-Battery Tester MBT-1 must be purchased through your center (e.g. from Amazon.com, SEARS, etc.). It will not be offered through BMW. Step B: Perform diagnosis using ISTA (Integrated Service Technical Application). Complete any test plans related to the radio remote control system. Note: If the remote control key must be replaced, swap the existing slide-in (mechanical) key into the new replacement remote control(s). Important: If the rearview mirror must be replaced (remote receiver is integrated) on a Convertible, please perform a visual check on the mirror to assure that the frequency of the remote receiver installed in the mirror is 315 MHz. [NEW] PARTS INFORMATION [NEW] WARRANTY INFORMATION ATTACHMENTS Attachment A - Information on ZTS Multi-Battery Tester MBT-1