TRIP COMPUTER - Functional description

Functional description

The ignition-operated power supply (INT) of the instrument panel E50 reaches pin 3 of connector A through the line of fuse F37 of the unit under the dashboard B2; the direct supply reaches pin 2 of connector A through the line of fuse F53 of the unit under the dashboard B2; pin 1 of connector A is earthed (earth controlled by the Body Computer M1 pin 36 of connector G).

The instrument panel E50 is connected from pins 5 and 6 of connector A to the Body Computer M1 and via the latter to the whole CAN network: via CAN the signal for the electronic speedometer arrives (coming from the ABS control unit M50): this signal is replicated from pin 16 of M50 to pin 7 of connector A of the Body Computer M1.

The electronic rev counter receives the rpm signal coming via CAN from the engine management control unit M10.

The fuel gauge is controlled in accordance with the signals coming from the fuel gauge sender unit located in the fuel pump assembly N40 - at pins 4 (positive) and 15 (negative) of connector D of the Body Computer M1, and from here via CAN to the instrument panel E50.

The TRIP electronic module uses these signals to process instantaneous and average fuel consumption information, range, average speed, mileage, duration etc.

The Trip Computer 'SET button, located on the stalk unit H5, sends an earth signal to pin 9 of connector A of E50.

The'MODE '+' and '-' controls for unit H91 send analogue signals to the instrument panel E50 to pins 13 and 16 of connector B.