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Trip Computer, Function - GF54.30-P-3044GN

MODEL 166 as of model year 2016 

MODEL 292 

Function requirements, general 

IMPORTANT The electronic ignition lock control unit (N73) transmits the status of circuit 15 via chassis CAN 2 (CAN E2) to the instrument cluster (A1).

Trip computer (TRIP) function, general 

The trip computer provides data and information on average fuel consumption, trip time, average speed, travel distance and remaining range.

The trip computer provides the following display screens:

The information displayed refers to the point in time of the last reset of the short-distance memory ("After start") or of the long-distance memory ("After reset").

The information "after start" or "after reset" is displayed in the multifunction display (A1p13) of the instrument cluster as follows:

The TRIP computer includes the following subfunctions:

Function sequence, travel distance display after start/after reset 

The travel distance is calculated on the basis of the wheel speeds. The Electronic Stability Program control unit (N30/4) transmits information about the wheel speeds via chassis CAN 1 (CAN E1), electronic ignition lock control unit and chassis CAN 2 to the instrument cluster. The instrument cluster calculates the distance traveled from the wheel speeds.

The "After start" travel distance is displayed in a range of 0 to 9999 km.

IMPORTANT If a period of more than t = 4 h lies between the time when circuit 15 is switched off and then switched on again, then the "After start" odometer is automatically reset to 0.

IMPORTANT If the odometer reading is between 6213 and 9999 and the distance unit is changed (e. g, from km to miles), the odometer will automatically be reset to 0. This reset remains active even if the unit is changed again.

Distance units are changed in the "settings" menu in the "instrument cluster" submenu. The unit can be changed from km to mi (miles) in the "speedometer/travel distance display unit" display window.

The "After reset" travel distance is calculated as for calculating the "After start" travel distance, however, here the display is in a range from 0 to 99, 999 km.

Depending on the setting in the instrument cluster or the coded national version, the travel distance is shown in:

IMPORTANT When kilometers are switched over to miles, liters are switched over to gallons automatically.

Function sequence, time display after start/after reset 

With circuit 15 ON, the time after start is added up by means of a time counter. The display is shown in a range from 0 to 999 h and 59 min.

The After reset time is calculated as for calculating the After start time, however, here the display is shown in a range from 0 to 9999 h and 59 min.

Function sequence for the average speed display 

The trip computer calculates the average speed from the ratio between the travel distance driven and the time passed (trip time) since the last reset of the short-distance memory or long-distance memory. The instrument cluster calculates the travel distance based on the wheel speeds.

Depending on the setting (kilometers/miles) and the coded national version, the average speed is shown in:

Function sequence for display of composite mileage and present consumption (except model 166.064/074/075/874 and except 292.374/375) and regenerative braking 

The trip computer calculates the fuel consumption using the following information:

Depending on the setting (kilometers/miles) and the coding of the national version of the instrument cluster, the fuel consumption is displayed in:

The CDI control unit or the ME-SFI [ME] control unit sends the relevant information about coolant temperature over chassis CAN 1, electronic ignition lock control unit and chassis CAN 2 to the instrument cluster.

IMPORTANT The present consumption (except model 166.064/074/075/874/875 and except 292.364/374/375) and regenerative braking are displayed together with the range. The displays are shown in the form of a bar display.

Function sequence for display of ECO score (driving style analysis) (except model 166.064/074/075/874/875 and except 292.364/374/375) 

G11969364

The "ECO Score" display graphically displays the individual handling characteristics in the form of a pie chart.

The following information is displayed:

On vehicles without code ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUG-IN)), the CDI control unit or the ME-SFI [ME] control unit sends the data required for evaluation via the chassis CAN 1, electronic ignition lock control unit and chassis CAN 2 to the instrument cluster.

On vehicles with code ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUG-IN)), the ME-SFI [ME] control unit sends the data required for evaluation via the hybrid CAN, powertrain control unit, chassis CAN 1, electronic ignition lock control unit and chassis CAN 2 to the instrument cluster.

Function sequence for remaining distance display 

The trip computer determines the expected range from the ratio between the current tank capacity and the average fuel consumption.

The current tank capacity is recorded by the left fuel tank fuel level indicator fill level sensor (B4/1) and the right fuel tank fuel level indicator fill level sensor (B4/2). The SAM control unit (N10) reads in the signals of the fuel tank fuel level sensors and sends them over the interior CAN (CAN B) to the instrument cluster. The average fuel consumption is gathered from the short-distance memory or long-distance memory.

Function sequence for display reset 

The TRIP computer is reset in the "Reset values" menu by pressing the OK button. (S110s6) in the left multifunction steering wheel button group (S110). Here, the reset is only carried out for the currently displayed information.

The steering wheel electronics (N135) read in the status of the O K button directly and transmit it via the steering LIN (LIN E1) to the steering column tube module control unit (N80). The steering column tube module control unit transmits the status of the O K button via chassis CAN 1, electronic ignition lock control unit and chassis CAN 2 to the instrument cluster.

Function sequence for power flow display (with CODE ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUG-IN))) 

G10050369

The power flow display in the multifunction display indicates whether the high-voltage battery (A100g1) is charging or delivering energy.

The battery management system control unit (N82/2) transmits the high-voltage battery data that is required for the display to the instrument cluster via the hybrid CAN (CAN L), the powertrain control unit (N127) chassis CAN 1, the electronic ignition lock control unit and the interior CAN.

  Electrical function schematic, instrument cluster trip computer   PE54.30-P-2057-97NBA
  Overview of system components, instrument cluster (IC) component description   GF54.30-P-9996GN 
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