3 Series E92 316i (N43) COUPE
Switch-off inhibitors and switch-on prompts
Besides its main function of propelling the vehicle,
the internal combustion engine has to provide other auxiliary functions.
These auxiliary functions are necessary for maintaining operating safety and comfort
functions and complying with emissions requirements.
Certain conditions are therefore governed by switch-off inhibitors and switch-on prompts,
either preventing the engine from being stopped or prompting its restarting.
Note:
The customer should be alerted to possible switch-on prompts (engine starts
without customer's intervention)!
If for instance the evaporator temperature with the air-conditioning system is above a
certain threshold value, this may serve as a switch-off inhibitor or switch-on prompt.
Switch-off inhibitors
The engine continues to run even though the gear lever is in the neutral position and the
clutch pedal has been fully released.
The following conditions act as switch-off inhibitors and prevent the engine from switching
off:
-
Air conditioning requirements:
-
Automatic air conditioning: MAX AC button pressed
-
Automatic air conditioning: Defrost button pressed (request to defrost the
windscreen)
-
Air-conditioning system: high blower speed and low blower temperature,
compressor button pressed
-
Air-conditioning system: high blower speed and air distribution directed to
windscreen, compressor actuated
-
Outside temperature
≤
3 C, and > 30 C with air-conditioning system activated
-
Engine coolant temperature below a particular value (depending on engine version
approx. 20 - 50 C)
-
Activated-charcoal filter needs flushing
-
Engine speed > 900 rpm
-
Battery status:
-
Battery charge too low
-
Measured battery charge not plausible
-
Battery temperature too high (approx. 50 C)
-
Starting voltage drop from previous ASSF start too low
-
Partial vacuum in brakes not low enough
-
Steering wheel movements by the driver
-
Vehicle rolling
Switch-on prompts
The switch-on prompt is regarded as an automatic engine start and depends on the
following conditions:
SI Auto Start Stop function E81 E87 E90 E91 E92 E93 R56
BMW AG - TIS
20.01.2013 09:21
Issue status (12/2007) Valid only until next DVD is issued
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