Display monitoring/warning messages via multifunction display, function - GF54.30-P-2012T

MODELS 211.0/2 

Function menu 

Starting from the basic screen, the following views can be called up in the central status area using the System Selection pushbutton (S110s3) and the Forward/Back pushbuttons (S110s1):

• Digital speedometer
• Service required
• Tire pressure
• Check engine oil level
• CNG (compressed natural gas) tank fill level display

Starting from the "Driving mode" basic display described various setting menus and information menus can be switched through on the multifunction display (A1p13) by changing the display level using the system selection button (S110s3) on the Multifunction steering wheel (MFL).

The information is always displayed in the central status area of the multifunction display (A1p13). Only those functions that are actually installed in the vehicle will be displayed:

• Audio displays
• Radio
• CD/CC
• TV tuner (except )
• Navigation
• Distronic (Autonomous intelligent cruise control) (DTR)
• Vehicle configuration
• Telephone display
• Taxi functions
• Telematik/Telematic Alarm Identification on Demand (only )
• Trip computer (TRIP)
• Fault and warning messages

Partitioning of displays 

The lower status area consists of the gear indicator (A1p12) and transmission mode display (A1p16) which are located as follows:

• The selected transmission mode is displayed on the left
• The selected drive position used is displayed on the right

The center status area consists of the multifunction display (A1p13). In the basic screen layout, the outside temperature and the trip odometer are displayed in this area; the display can be configured.

Display priority 

Which displays and functions appear depends on the current situation and priority. The instrument cluster (A1) differentiates between the primary and secondary priority of each message. The multifunction display (A1p13) first shows the messages in the sequence of the respective main priority. If there are several equal messages, the value of the sub-priority decides the display sequence.

New messages have the highest priority. After it has been displayed once, the message is entered in the display sequence. The messages are divided into the following three categories according to their priority.

• Messages of the highest priority belong to category 1. These messages cannot be acknowledged. When they occur, a brief warning tone is sounded. Any errors of categories 2 and 3 are hidden.
• Messages of medium priority belong to category 2. These messages can be acknowledged and canceled using the instrument illumination rheostat and reset knob (A1r1). When they occur, a brief warning tone is sounded. Any faults of category 3 are hidden.
• Messages of the lowest priority belong to category 3. These messages can be acknowledged and canceled using the instrument illumination rheostat and reset knob (A1r1). There is no warning tone.

The method of functioning of the CNG fuel tank display for the engine M271 is described in detail in the CNG (compressed natural gas) system description.

Fault storage 

The messages are stored in 3 roll memories according to their priority:

• U roll
• W roll
• N roll

U roll 

This is the directory of all unacknowledged warning messages displayed on the multifunction display (A1p13). Displays of the same of a higher priority are displayed once the minimum display time of the preceding message has elapsed. Once the minimum display time for the warning with the lowest secondary priority has elapsed the fault roll starts again with the warning with the highest main priority (ring memory).

W roll 

This is where all the acknowledged errors that occurred while driving are entered. It can be called up as required from the menu tree on the multifunction display (A1p13). When the roll is called up, a start screen showing the number of errors that occurred is first displayed, followed by the errors in main priority sequence.

N roll 

After disconnecting terminal 15R, all messages entered in the error roll are automatically called up in the N roll in secondary priority sequence. The number of errors entered in shown in the start screen. The warning buzzer (A1h1) sounds briefly when the start screen is displayed. The displayed messages must be acknowledged. The N roll stops when all the warnings have been acknowledged. If there are messages entered or if all the entered messages are acknowledged, the multifunction display (A1p13) is switched off after 30 s. If some messages have still not been acknowledged, the display will stay on for 2 minutes.

If the N roll is interrupted by a higher priority message, it starts again with the start screen.

Some messages (including dynamic curve illumination) are accompanied by the lighting of a warning or indicator lamp. These lamps remain lit until the fault is rectified. This applies even if the corresponding message was acknowledged.

Acknowledging messages 

Warning and error messages can be acknowledged automatically or manually. Manual acknowledgment takes place by pressing the steering wheel buttons, scroll forward/back button (S110s1) and System selection button (S110s3) or the instrument illumination rheostat and reset button (A1r1). If the cause of a message which can be acknowledged automatically is discontinued, the warning is displayed on the multifunction display (A1p13) for the duration if its minimum display time.

For faults, which are in addition displayed via an indicator lamp, the lamp is activated simultaneously with the message on the multifunction display (A1p13). The lamp remains actuated for as long as the fault exists, irrespective of whether the fault message on the multifunction display (A1p13) has already been acknowledged.

Acknowledgment of messages (as of 1.6.05) 

The windshield washer fluid level is displayed as of the circuit status

"Circuit 15C ON" displayed and is acknowledged automatically after 5 s. Acknowledgment by pressing the steering wheel buttons, scroll forward/back button (S110s1) and system selection button (S110s3) or instrument illumination rheostat and reset button (A1r1) continues to be possible.

Reminder of acknowledged messages 

If messages have been acknowledged while driving, when "Circuit 15R is ON" these are displayed once again as a reminder.

In the process current messages, e.g. lights on warning, hide this reminder function. If there are no messages, the main screen appears after "Terminal 15R ON".

Display stored error messages 

When the instrument cluster (A1) is active, you can scroll though the saved messages:

• Press the system selection button (S110s3) until the display "(number of) PROBLEMS" appears on the multifunction display (A1p13) (up to 31.5.05)
• Press the system selection button (S110s3) until the display "(number of) MESSAGES" appears on the multifunction display (A1p13) (as of 1.6.05)
• Use the button + and -, setting of specific functions and volume control (S111s1) to scroll through the fault messages. The messages are displayed according to their priority.

Example 

In order to inform the customer about the lower performance of the battery (G1), the message "electrical consumers switched off" appears on the multifunction display if the battery control unit (N82) detects a poor charge level.

Messages presented in white only have information functions. Consumers that do not impair driving safety are shut off until the overall state of the on-board electrical system has stabilized again.

Consumer shutoff is apparent, amongst others, by the flashing of the indicator lamp belonging to the switched on heated rear window or heated seats.

Message (white) in instrument cluster (A1) 

• "Malfunction - Electrical consumers switched off". The charge level of the battery (G1) is too low (consumer shutoff stage 1, fault code 9051).
• "Malfunction - Electrical consumers switched off". The charge level of the battery (G1) is very low (consumer shutoff stage 2, fault code 9050).

Message (red) in instrument cluster (A1) 

• "Battery/alternator - go to garage + Electrical consumers switched off". The message of circuit status "Circuit 61 ON" does not exist as a message on the Controller Area Network bus Class B (interior) (CAN-B).
• "Battery/alternator - go to garage + Electrical consumers switched off". The charge level of the battery (G1) is very low (backup battery < 10.5 V or line to the battery control unit (N82) is interrupted (short circuit), fault code 9092).

Consumer shutoff: 

The consumer shutoff is subdivided into the following 3 categories:

• Fault code 9051 (shutoff level 1)
• Fault code 9050 (shutoff level 2)
• Fault code 9092 (backup battery < 10.5 V or line to the battery control unit (N82) interrupted (short circuit))

The following systems are affected by the consumer shutoff (shutoff level 1, fault code 9051):

• STH heater unit (A6)
• Blower motor (A32m1) (reduced to 69 %)
• Steering wheel heater electronics (A74)
• Front left door warning lamp (E17/19)
• Front right door warning lamp (E17/21)
• Rear left door warning lamp (E17/20)
• Rear right door warning lamp (E17/22)
• left front door entrance and exit lamp (E17/3)
• right front door entrance and exit lamp (E17/4)
• left rear door entrance and exit lamp (E17/5)
• right rear door entrance and exit lamp (E17/6)
• SRA pump (M5/2)
• Left front seat cushion ventilation motor group (M18/9)
• Left front seat backrest ventilation motor group (M18/10)
• Right front seat cushion ventilation motor group (M18/11)
• Right front backrest ventilation motor group (M18/12)
• Left front seat adjustment motor group with memory (M27)
• Right front seat adjustment motor group with memory (M28)
• Driver-side front seat adjustment control unit, with memory (N32/1)
• Passenger-side front seat adjustment control unit with memory (N32/2)
• Heated rear window (R1)
• Left front seat heated cushion (R13/1)
• Right front seat cushion heater element (R13/3)
• Left front backrest heated cushion (R13/2)
• Right front backrest seat cushion heater element (R13/4)
• Left rear backrest heated cushion (R13/6)
• Right rear backrest heated cushion (R13/8)
• Left rear side piece heated cushion (R13/9)
• Right rear side piece heated cushion (R13/10)

The following systems are affected by the consumer shutoff (shutoff level 2, fault code 9050):

• Blower motor (A32m1) (reduced to 53 %)
• left front reading lamp (N70e2)
• right front reading lamp (N70e3)
• Surround lamp (A67e3)
• Rear interior lamp (E15/3)
• right front footwell lamp (E17/15)
• left front footwell lamp (E17/16)
• right rear footwell lamp (E17/17)
• left rear footwell lamp (E17/18)
• Trunk lid drive motor (M51/2)
• Left electrically adjustable and heated outside mirror (M21/1)
• Right electrically adjustable and heated outside mirror (M21/2)
• PTS control unit (N62)
• Washer nozzle heating (R2/1)
• Washer nozzle hose heater (R2/11)
• Illuminated cigar lighter (R3)

Display monitoring/warning messages via indicator lamps, function

GF54.30-P-2011T