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Home >> BMW >> 2018 >> X3 M40i >> Repair and Diagnosis >> External Pages >> Different car >> Section 763 (Functional Descriptions - F25 - Charging System, Anti-Theft, Body Electrical Systems) >> Body Electrical System - Functional Description >> Energy diagnosis procedure >> Events and measures in the event of inhibited sleep mode or unauthorized wake-up

Events and measures in the event of inhibited sleep mode or unauthorized wake-up

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In the event of inhibited sleep mode or unauthorized wake-up, various measures, such as switching off terminals, take effect in succession in order to prevent total discharge and to ensure the vehicle's starting capability.

Inhibited sleeping: 

Fig 1: Central Gateway Module Graph (Inhibited Sleeping)
G09908882Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Terminal R OFF
2 Cause originator(s) registered on central gateway module 2 min before Terminal 30B off.
3 Terminal 30B switched off (if vehicle unlocked or tailgate open, 30 min after Terminal R off).
4 2 min after Terminal 30B off: Cause originator(s) registered on central gateway module. Central gateway module transmits the power-down command.
5 2 min after power-down command: Cause originator(s) registered on central gateway module. Central gateway module requests a reset of terminal 30F.
6 2 min after request from central gateway module the terminal control carries out a reset of terminal 30F.
7 2 min after terminal 30F reset: Cause originator(s) registered on central gateway module. Central gateway module requests that terminal 30F be switched off.
8 2 min after request from central gateway module the terminal control carries out a reset of terminal 30F.
9 Vehicle fails to enter rest state after Terminal R off.
10 Terminal R on: Bus communication is active.

Unauthorized wake-up: 

Fig 2: Central Gateway Module Graph (Unauthorized Wake-Up)
G09908883Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Terminal R OFF
2 Terminal 30B switched off (if vehicle unlocked or tailgate open, 30 min after Terminal R off).
3 After terminal 30B is switched off, the central gateway module registers the same wake-up cause five times or 16 wake ups. Central gateway module then requests a reset of terminal 30F. Terminal control resets terminal 30F.
4 After terminal 30F is reset, the central gateway module registers a wake up that is already active, or it has registered 16 wake ups since terminal 30B was switched off. Central gateway module requests that terminal 30F be switched off. Terminal control unit switches off terminal 30F.
5 After Terminal R off, the vehicle is woken up when it shouldn't be.
6 Terminal R on: Bus communication is active.