Mirror Taximeter, Function - GF82.25-P-2010LF
Model 222 with code 338 (Odometer in rear-view mirror) with code 965 (Taxi/rental car - electrical pre-installation)
Function requirements, general
- Mirror taximeter (A50/1) calibrated for vehicle
If the mirror taximeter is not calibrated for the vehicle, a "No Car code" message is shown. In this case no function error exists. The message is extinguished when the mirror taximeter is calibrated.
Mirror taximeter, general
The mirror taximeter determines the fare and displays this in the upper left area of the inside rear-view mirror (A67).
The mirror taximeter function consists of the following subfunctions:
- Activate mirror taximeter function sequence
- Function sequence for determining the fare
Additional function requirements for activating mirror taximeter
- Mirror taximeter in "Free" status (indicated by "Tariff F" text)
- Vehicle standing still (v = 0 km/h)
Activate mirror taximeter function sequence
The mirror taximeter is activated by pressing mirror taximeter button 1 (A67s4) on the inside rear-view mirror. Calculation of the fare is then started.
If the mirror taximeter has not been manually activated and a passenger sitting on the front passenger seat is being conveyed, the special-purpose vehicle multifunction control unit (N26/9) automatically activates the mirror taximeter through the multifunction CAN (CAN K), as soon as the vehicle starts to move (v > 0 km/h).
To do so, the multifunction control unit evaluates the following input factors:
- Mirror taximeter button 1 status
- Front passenger seat occupied status
- Vehicle speed
The mirror taximeter reads in the status of the mirror taximeter button 1 directly, and sends this over the multifunction CAN to the multifunction control unit.
The Supplemental Restraint System control unit (N2/10) evaluates the front passenger seat occupied status and sends corresponding information over the user interface CAN (CAN HMI), electronic ignition lock control unit (N73) and the interior CAN (CAN B) to the multifunction control unit.
Detailed information on the front passenger seat occupied recognition is available in the separate function description "Supplemental restraint system, function".
The instrument cluster (A1) sends the vehicle speed over the user interface CAN, electronic ignition lock control unit and the interior CAN to the multifunction control unit.
The mirror taximeter is always automatically switched off after t = 30 minutes if the vehicle was locked from the outside and the mirror taximeter is in "Free" status or in "Intermediate shift" status.
Function sequence for determining the fare
The mirror taximeter uses the distance traveled as the basis for calculating the fare.
The distance traveled is defined via the wheel speed, which is recorded by the left front axle rpm sensor (L6/1). The Electronic Stability Program control unit (N30/4) reads in the signals from the left front axle rpm sensor and sends them over the chassis FlexRay (Flex E), electronic ignition lock control unit, interior CAN, multifunction control unit and the multifunction CAN to the mirror taximeter.
The fare calculation is subject to the Weights and Measures Act. If the taxi is equipped with a card reader and printer (A50/2) (accessories), the fare due can be settled by card payment and a receipt can be printed out. The mirror taximeter sends the printout request over the multifunction CAN to the card reader and the printer. If, at the end of a journey, a switch is made to the Payment mode by pressing mirror taximeter button 1, the interior illumination (IBL) is automatically switched on when it is dark outside.
The multifunction control unit sends the request "Switch on interior lights" over the interior CAN to the front SAM control unit (N10/6). The interior illumination can be manually switched off again. The Payment mode is terminated by pressing mirror taximeter button 1 and the system switches to the "Free" status.
Detailed information on the actuation of individual components of the interior illumination can be found in the separate function description "Interior illumination, function".
The mirror taximeter saves the following trip data:
- Trip information and driving shifts
- Stretches driven
- Processing of driving jobs
Detailed information is available in the separate supplementary instructions for the mirror taximeter.
| Electrical function schematic for mirror taximeter | PE82.25-P-2064-97SEA | ||
| Overview of system components for taxi/rental vehicle | GF82.25-P-9890LF |