Antitheft System - Siren Not Active When Panic Button Pressed
SI B65 21 12
Audio, Navigation, Monitors, Alarms, SRS
December 2012
Technical Service
SUBJECT
Alarm System Siren Is Not Active when Panic Button Is Pressed
MODEL
2010 BMW 750Li xDrive AWD (F02) V8-4.4L Turbo (N63) Page 402
F01
F02
F10
F25
Vehicles with option code 302 (Anti-theft Alarm System)
SITUATION
When the panic button is pressed on the remote control key for 3 seconds or more, the alarm siren does not sound. Only the 4-way flashers come on.
CAUSE
Software error in the FZD module (Roof Function Center)
This error only occurs when the vehicle is programmed with ISTA/P2.47.7 or 2.48.1
PROCEDURE
Do not replace parts.
1. Perform diagnosis using the latest ISTA diagnostic software version. Complete all test plans for any stored faults in the DWA (Anti-theft
Alarm System). If no faults are stored proceed to the next step.
Note:
When the ISTA system message displays: "Battery voltage only "XX.XX" V. Please connect charger." Please note the displayed battery
voltage reading in the repair order comments section.
2. Reprogram the vehicle using ISTA/P 2.48.2 or higher. For example, if the vehicle was programmed with ISTA/P2.48.1, the measures plan will
only include the FZD module for new coding. The new I-Levels included in 2.48.2 are as follows:
^ F01, F02: F001-12-11-503
^ F10: F010-12-11-503
^ F25: F025-12-07-509
Note that ISTA/P will automatically reprogram and code all programmable control modules that do not have the latest software.
For information on programming and coding with ISTA/P, refer to CenterNet / Aftersales Portal / Service / Workshop Technology / Vehicle
Programming.
2010 BMW 750Li xDrive AWD (F02) V8-4.4L Turbo (N63) Page 403
