SSP_379_d3.pdf

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SSP 379 - The Eos 2006, Electrical system
 
Convenience electronics
Operating conditions
Various conditions have to be met to enable roof
movement to be carried out. This applies to opening
and closing the convertible roof. One vital element of
roof movement release is the detection of a plausible
roof assembly position. This applies to the position of
the roof assembly within its own movement sequence
(e.g. identical signal from the sensor pair) and to the
position of the roof assembly within the entire roof
movement sequence.
The release conditions also include the position of the
rear lid (e.g. the C segment must not pivot down
before the rear lid is closed).
Accordingly, the information "C segment is locked"
and "rear lid is open" would be implausible.
Conditions for opening the roof
1
Terminal 15 ignition is "on".
2
The convertible roof position is plausible.
3
The CAN data bus reports "communication is possible".
4
The sliding roof reports "communication is possible".
5
The position of the sliding roof has been recorded.
6
Sliding roof not overheated.
7
The microswitch detects the engaged luggage cover.
8
The engine control unit (or ABS ECU/dash panel insert) reports "vehicle speed is
less than 1 km/h".
9
The convertible roof actuation control unit detects that roof movement has not yet been completed,
i.e. the information "roof open" is not yet available.
10 The sensors report " rear lid is closed".
11 The convertible roof actuation switch supplies a plausible signal.
12 The hydraulic pump temperature sender reports "temperature below 95 °C". *
13 The hydraulic unit reports a valve operating time of less than 8 minutes. **
14 No trailer operation detected.
15 The vehicle electrical system control unit reports a system voltage of over 10.8 V.
16 The door control units report that the necessary window position has been reached.
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17 The power latching system reports "closed" after the convenience system control unit has output the signal "convertible
roof box main catch closed".
18 The control unit with display in dash panel insert reports "exterior temperature greater than minus 15 °C". ***
19 The heated rear window is switched off. It is automatically deactivated on actuation of the convertible roof switch.
20 As a parking aid function (special equipment), rear lid assist
reports "no obstacle in rear area".
*
If the temperature of the hydraulic fluid exceeds 95°C, only the "close convertible roof" command is possible.
If the temperature of the hydraulic fluid exceeds 105°C, actuation of the convertible roof is blocked completely
until the temperature falls below the threshold value again.
** If the hydraulic unit's valves are operated for longer than 8 minutes, e.g. due to repeated opening and closing,
the convertible roof control system only permits the roof to be closed. Opening is then no longer possible.
This measure also serves to prevent overheating, etc.
*** If the temperature falls below minus 15°C, it is assumed that the viscosity of the hydraulic fluid is too high to
enable roof movement.
Conditions for closing the roof
The pre-conditions are essentially identical to those of opening. Exceptions include:
2
At least one sensor must supply a plausible signal (logical 0/1) for each partial convertible roof movement.
7
The microswitch signal that the luggage cover is in position is not vital as regards
closing the roof.
9
The convertible roof must not already be fully closed for the "close" command.
12 A hydraulic fluid temperature of over 95 ° but below 105 °C does not influence the close command.
13 The total actuation time of the hydraulic pump valves must be less than 9.5 minutes
so that the close function is released.
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Convenience electronics
Convertible roof movement abort conditions
Different conditions, which lead to the abortion of roof movement, apply to prevent damage to the roof. The
convertible roof responds in different ways depending on which abort condition has occurred.
These range from stopping roof movement and the options of only being able to open or close the convertible roof
to clocked lowering of the roof package in the event of a timeout. One further possibility is complete failure in the
event that operating voltage is absent.
The following conditions lead to the abortion of convertible roof movement:
1
The vehicle electrical system voltage falls below 9.0 V.
2
The ignition (terminal 15) is switched off.
3
Communication via the CAN data bus is interrupted.
4
The convertible roof actuation control unit determines that at least one hydraulic valve is defective.
5
The convertible roof actuation control unit determines a defect in the hydraulic unit.
6
The sensors report that the rear lid is not closed.
7
The sensors report that the power latching system is not closed.
8
A trailer is detected via the trailer socket.
9
The sensors do not supply plausible signals regarding the convertible roof position.
10 The speed is higher than 1 km/h.
11 The temperature of the hydraulic pump rises above 105°C .
12 The terminal stage of the convertible roof actuation control unit is overheated (overheating protection).
13 The convertible roof actuation control unit fails due to an internal fault.
14 The door control units supply implausible signals regarding the window position or are reported as having failed.
15 The convenience system control unit supplies implausible or no signals.
16 The gateway supplies implausible or no signals.
17 The gearbox control unit supplies implausible or no signals.
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18 The total hydraulic valve operating time exceeds 9.5 minutes.*
19 The convertible roof actuation switch signal is interrupted.**
20 The convertible roof actuation control unit generates a timeout.***
21 During the opening process, the luggage cover microswitch reports that the convertible roof guard is not engaged.
22 During roof movement, the exterior temperature falls below the threshold value of minus 15 °C.
23 The convertible roof actuation control unit determines that the temperature sender in the hydraulic unit has failed.
*
Convertible roof movement is interrupted if a period of 8 min is exceeded.
** The convertible roof actuation switch may be defective, or the operator releases the switch.
*** Under certain circumstances, the hydraulic pump runs although certain of the preceding steps in the mechanical sequence
have not yet been carried out or completed. The convertible roof actuation control unit registers
this and switches the hydraulic pump off after a few seconds.
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