Displaying check/warning messages by means of multifunction display, function - GF54.30-P-2012S
MODEL 215, 220
Multifunction display (A1p13), valid up to 31.8.02:
Various pieces of driver information are displayed in the multifunction display (A1p13).
In addition to displaying the total and trip mileage (main screen), information for the following systems can also be selected and displayed on the multifunction display (A1p13):
- Audio
- Telephone (special equipment)
- Navigation (special equipment)
- Distronic (special equipment)
- Trip computer
Modification valid as of 01.6.01:
- Digital speedometer in multifunction display (A1p13)
- In taxi vehicles "Terminal 30", warning messages are displayed once per driving cycle for 2 minutes and can be acknowledged. The interior compartment CAN is wakened in the event of a taxi emergency call without the instrument cluster (A1).
In addition, various fault and warning messages can be displayed on the multifunction display (A1p13)) if the driver so wishes.
Multifunction display (A1p13), valid as of 01.9.02:
Various driver information is presented in the multifunction display (A1p13).
Starting from the main screen, the following displays can be called up using the system selection button (S110s3) and scroll forward/back button (S110s1):
- Digital speedometer
- Service indicator
- Service scope as of 01.09.03
- Tire pressure
- Engine oil level scan
Starting from the described "driving mode" screen, it is possible to scroll through various setting and information menus on the multifunction display (A1p13) by changing the display level using the system selection button on the multifunction steering wheel.
Only systems and functions with which the vehicle is equipped are displayed:
- Audio displays
- Radio
- CD
- CC
- TV tuner (special equipment)
- Navigation (special equipment)
- Distronic (adaptive cruise control) (special equipment)
- Vehicle configuration
- Telephone display (special equipment)
- Taxi functions (special equipment)
- Telematics/Tele Aid (USA)
- Trip computer
- Fault and warning messages
Classification of fault and warning messages into categories, valid up to 31.8.02:
The messages are divided into three categories according to their priority.
- Messages of the highest priority belong to category 1. These messages cannot be acknowledged. A short warning chime also sounds when these messages are displayed. Any errors of categories 2 and 3 are hidden.
- Messages of medium priority belong to category 2. These messages can be acknowledged by pressing the reset button (r). A short warning chime also sounds when these messages are displayed. Any errors of category 3 are hidden.
- Messages of the lowest priority belong to category 3. These messages can be acknowledged by pressing the reset button (r). A warning chime does not sound.
If no other malfunctions are present, the display will revert to the previous mask when the error status message is acknowledged.
Classification of fault and warning messages into categories, valid as of 01.9.02:
The messages are divided into three categories according to their priority.
- Category 1:
Warning messages with the same priority are displayed immediately and hide menu levels. Any warning messages of category 2 are also hidden. The messages disappear if the reason for their appearance no longer exists. If there is more than one message, each one is displayed in turn for 5 seconds. The messages cannot be acknowledged.
- Category 2:
Warning messages are only displayed if there are no priority 1 messages. New priority 2 messages are displayed for at least 2 seconds; if there is more than one message, each one is displayed in turn for 5 seconds. Other properties such as color, warning chime, acknowledgment capability and so on are specified in the properties of each message. Additionally, the priority 2 messages are divided into 3 classes.
Class 2A: After acknowledgment, the errors are written to the diagnostic trouble code memory and are no longer displayed for this driving cycle.
Class 2B: After acknowledgment, the errors are not written to the diagnostic trouble code memory and are no longer displayed for this driving cycle.
Class 2C: After acknowledgment, the errors are not written to the diagnostic trouble code memory. If the message has been acknowledged, it is released for display again if it was inactive for longer than 2 seconds.
Warning chime:
The warning chime mentioned above is a warning gong in Model 220 and Model 220 as of 01.0.99 and is a warning buzzer in Model 220 up to 31.8.99.
Some messages are accompanied by a warning or indicator lamp for the duration of the fault. This applies even if the corresponding message was acknowledged.
Storage of messages, valid up to 31.8.02:
Messages of category 1 are not stored. Most fault messages of category 2 and 3 are, however, stored in a cyclic memory in the instrument cluster (A1) after they have been acknowledged.
Fault messages of category 2 and 3 that have not been acknowledged are sent automatically to the cyclic memory when terminal 15R is switched OFF. A maximum of 16 fault messages can be stored. If another fault occurs, the oldest fault message is overwritten.
Storing messages, valid as of 01.9.02:
Messages of category 1 are not stored and cannot be acknowledged since the display disappears immediately as soon as the reason for its appearance no longer exists.
The messages of category 2 are divided into 3 classes (2A, 2B, 2C), as described above. Only the messages of class 2A and 2B are stored.
Display of fault and warning messages:
With very few exceptions (e.g. lights warning, key in ignition), fault messages are only displayed when the engine is running.
Current fault messages, valid up to 31.8.02:
- Displayed immediately. If the fault exists for just a short time, messages of category 2 and 3 are displayed for at least 2 seconds. Messages of category 1 are displayed for as long as the fault remains.
Current fault messages, valid as of 01.9.02:
- Displayed immediately and hide the menu levels. Messages of category 1 are displayed for as long as the error remains. Messages of category 2 are also displayed immediately for at least 2 seconds, but cannot hide messages of category 1.
Several current fault messages:
- If several fault messages of different priority are present at the same time, the message with the highest priority is displayed.
- New fault messages of the same or higher priority category hide the previously displayed message.
- If several faults of the same category occur at the same time, the messages are displayed in turn for 5 seconds.
Reminder of acknowledged messages:
If the driver acknowledges messages while driving, these messages are displayed again as a reminder after "Terminal 15R OFF". In this case, current messages, e.g. lights warning, hide this reminder function.
- If there were no messages, the main screen appears when terminal 15R is switched OFF.
Displaying stored fault messages:
The driver can scroll through the stored messages when the instrument cluster (A1) is activated:
- Press the system selection button (S111s3) repeatedly until "-- FAULTS" appears in the multifunction display (A1p13).
- Scroll through the fault messages using the scroll forward/back button (S110s1). The messages are displayed in the order in which they were acknowledged.
Example, valid up to 31.8.02:
Four of the approximately 200 possible messages can be found below accompanied by a short description.
The order in which the messages are displayed if several errors occur at the same time can be explained using an example:
- The windshield washer fluid level has fallen below the minimum mark. The following message of category 3 appears on the multifunction display (A1p13). "CHECK WASHER FLUID LEVEL" (Figure 1).
- If another fault occurs at the alternator, the category 2 message "BATTERY/ALTERNATOR CHECK - VISIT WORKSHOP!" is displayed (Figure 2). This message hides the first message because it has a higher priority.
- If the coolant level then also drops below its minimum mark, the category 2 message "CHECK COOLANT LEVEL!" is displayed (Figure 3). The display now alternates every 5 seconds between this message and the message "BATTERY/ALTERNATOR CHECK - VISIT WORKSHOP!" (Figure 2) because there are now two messages with the same priority.
The example assumes that none of the messages were acknowledged by the driver.
Illustration showing warning message of category 3, valid up to 31.8.02
Figure 1
Illustration showing warning message of category 2, valid up to 31.8.02
Figure 2
Illustration showing warning message of category 2, valid up to 31.8.02
Figure 3
Illustration showing warning message of category 2, valid up to 31.8.02
Figure 4
Figure 1:
Warning message of category 3:
This category 3 message is displayed when the level of washer fluid for the windshield and headlamp cleaning system drops below the minimum.
This information comes from the right front SAM control unit (N10/7) via the interior compartment CAN.
For more information, see document:
"Coolant/washer reservoir fluid level voltage code entry, function"
Figure 2:
Warning message of category 2:
This category 2 message is displayed if the alternator is not functioning correctly, but the engine speed is higher than 200 rpm. For more information, see document:
"Battery charge and alternator check, function".
Figure 3:
Warning message of category 2:
This category 2 message appears when the coolant drops below the minimum level.
This information is sent on the interior compartment CAN by the right front SAM control unit (N10/7).
For more information, see document:
"Coolant/washer reservoir fluid level voltage code entry function"
Figure 4:
Warning message of category 2:
This category 2 message appears when a malfunction in the interior and/or engine compartment CAN occurs, affecting communications with several control units.
If communications with only one control unit are affected, the symbol for the affected system appears at position (2).
Displaying stored fault messages:
The driver can scroll through the stored messages when the instrument cluster (A1) is activated:
- Press the system selection button repeatedly until "--FAULTS" appears on the multifunction display (A1p13).
- Scroll through the fault messages using the scroll forward/back button (S110s1). The messages are displayed in the order in which they were acknowledged.
Example, valid as of 01.9.02
Four of the approximately 200 possible messages can be found below accompanied by a short description.
The order in which the messages are displayed if several errors occur at the same time can be explained using an example:
- The filler cap is open. In the multifunction display (A1p13), the priority 2 / class 2 C message "CHECK FILLER CAP!" is displayed (Figure 1).
- A loss of tire pressure occurs. In the multifunction display (A1p13), the priority 2 / class 2 B message "CHECK TIRES!" is displayed (Figure 2).
- If another fault occurs at the alternator, the priority 2 / class 2 A message "BATTERY/ALTERNATOR" "VISIT WORKSHOP!" is displayed (Figure 3).
Three priority 2 messages now exist and are displayed; since the messages have the same priority, they are each displayed alternately for 5 seconds.
- The driver has forgotten to release the parking brake. The priority 1 message is displayed in the multifunction display (A1p13); the priority of this message means that it hides all other messages. If the parking brake is released again, the display disappears and the other messages are displayed alternately until the faults have been rectified.
This only applies if the error messages have not been acknowledged.
Illustration showing warning message of priority 2 / class 2C, valid as of 01.9.02
Figure 1
Illustration showing warning message of priority 2 / class 2B, valid as of 01.9.02
Figure 2
Illustration showing warning message of priority 2 / class 2A, valid as of 01.9.02
Figure 3
Illustration showing warning message of priority 1, valid as of 01.9.02
Figure 4
| Instrument cluster (IC), location / task | GF54.30-P-3039S |