MSA System control

This function is used to read out the history from the MSA system and to reset the history memory.
The function of the MSA Automatic engine start/stop is to reduce carbon dioxide emissions. Fuel consumption is reduced, as the engine automatically switches off when the vehicle is at a standstill. The engine automatically restarts when the connection conditions are fulfilled. Second generation MSA enables vehicles to be fitted with either manual or automatic transmission.
This function can be used to:
  1. See an overview of MSA (number of engine stops and number of MSA engine stops).
  2. See an overview of the history (disconnection lock and connection requests), and reset the history memory.
  3. See an overview of the 10 most recent start hindrances.
Note:
If the history memory is reset, the overview of the 10 most recent start hindrances is also reset.
Vehicle conditions: MSA only works under certain conditions.
MSA stop
The engine switches off under the following conditions:
MSA start
The engine starts automatically when:
Disconnection lock
The following conditions prevent an MSA stop:
Hybrid vehicle
Connection request
The following conditions are required for an engine start:
Hybrid vehicle
Safety requirements
The following conditions will deactivate MSA:
Test conditions:
Execution:
Table of explanations for overview of history memory:
Table of explanations for overview of the 10 most recent start hindrances:
The table of start locks shows the 10 most recent chronological instances of MSA. A reconnection between MSA "deactivated" and "released" is stored. The kilometre position shows in which stretch of driving the status occurred.
Start lock
for X km
0
512
3
2
0
157
6
0
0
2640
6
0
0
1
5
2
0
15
3
0
Figures
Explanation
0
No disconnection lock, no MSA disruption.
1
No MSA vehicle.
2
MSA deactivated from engine control.
3
MSA deactivated via diagnosis system.
4
Transport mode active.
5
MSA button activated.
6
Driver absence identified.
7
Driver absence identified.
8
Bonnet open, bonnet contact.
9
Towing identified.
10
Engine is turned off unintentionally.
11
Trailer identified.
12
Coolant temperature too low.
13
No ignition key identified, no start.
14
Fault memory available for relevant MSA details.
15
Fault memory available for relevant MSA details.
16
Fault in impulse memory in gearbox.
17
MSA button defect.
18
Hybrid power electronics.
19
Hybrid fault.
20
Hybrid fault.
21
MSA engine fault.
22
MSA engine fault.
23
Mechanical air inlet regulator supplying too little or no underpressure (M vehicle).
24
Gearbox not ready.
25
Communication error.
26
Starter generator preventing MSA start.
27
Driver absence.
28
Start taking too long, start timeout.
29
Insufficient RPM for engine start.
30
Delayed start process.
31
Safety concept.