Component description for instrument cluster

P54.30-9731-76

Model 245 without code (924) Bivalent natural gas drive, model 169 except model 169.090

A1 Instrument cluster

A1e1 Left turn signal indicator lamp

A1e2 Right turn signal indicator lamp

A1e3 High beam indicator lamp

A1e4 Fuel reserve indicator lamp

A1e7 Brake fluid and parking brake warning lamp

A1e9 Seat belt warning lamp

A1e15 Airbag indicator and warning lamp

A1e16 Preglow indicator lamp
(on diesel engine)

A1e17 ABS indicator lamp

A1e33 LIM (variable speed limiter) function indicator lamp

A1e41 ESP warning lamp

A1e54 Coolant temperature warning lamp

A1e58 Engine diagnosis indicator lamp

A1e66 Tire pressure monitor warning lamp

A1e67 Low beam indicator lamp (for model 245)

A1p1 Coolant temperature gauge

A1p2 Fuel level and reserve indicator

A1p4 Ambient temperature display

A1p5 Tachograph

A1p6 Electronic clock

A1p8 Electronic speedometer

A1p12 Gear indicator (with transmission 722)

A1p13 Multifunction display

A1p16 Transmission mode display

A1r1 Instrument illumination brightness control and reset button

P54.30-9777-76

Model 245 with code (924) Bivalent natural gas drive

A1 Instrument cluster

A1e1 Left turn signal indicator lamp

A1e2 Right turn signal indicator lamp

A1e3 High beam indicator lamp

A1e4 Fuel reserve indicator lamp

A1e7 Brake fluid and parking brake warning lamp

A1e9 Seat belt warning lamp

A1e15 Airbag indicator and warning lamp

A1e17 ABS indicator lamp

A1e31 CNG indicator lamp

A1e33 LIM (variable speed limiter) function indicator lamp

A1e41 ESP warning lamp

A1e54 Coolant temperature warning lamp

A1e58 Engine diagnosis indicator lamp

A1e66 Tire pressure monitor warning lamp

A1e67 Low beam indicator lamp

A1p1 Coolant temperature gauge

A1p2 Fuel level and reserve indicator

A1p4 Ambient temperature display

A1p5 Tachograph

A1p6 Electronic clock

A1p8 Electronic speedometer

A1p12 Gear indicator (with transmission 722)

A1p13 Multifunction display

A1p16 Transmission mode display

A1r1 Instrument illumination brightness control and reset button

P54.32-8745-76

Model 169.090

A1 Instrument cluster

A1e1 Left turn signal indicator lamp

A1e2 Right turn signal indicator lamp

A1e3 High beam indicator lamp

A1e7 Brake fluid and parking brake warning lamp

A1e9 Seat belt warning lamp

A1e15 Airbag indicator and warning lamp

A1e17 ABS indicator lamp

A1e41 ESP warning lamp

A1e66 Tire pressure monitor warning lamp

A1e67 Low beam indicator lamp

A1p2 Fuel level and reserve indicator

A1p4 Ambient temperature display

A1p6 Electronic clock

A1p8 Electronic speedometer

A1p12 Gear display

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A1p13 Multifunction display

A1p19 Power indicator display

A1p20 Power indicator display

A1r1 Instrument illumination brightness control and reset button

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Location

The instrument cluster is located in the dashboard on the driver-side.

Task

The instrument cluster has the following tasks:

 Reading in of sensors, pickups and signals

 Evaluation of input factors

 Actuation of warning and indicator lamps and displays

 Output of warning tones and indicator tones

 Output of signals

Reading in of sensors, pickups and signals

The instrument cluster reads in the input factors via the following connections:

 Interior CAN (CAN B)

 Engine compartment CAN (CAN C)

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Interior CAN

The signals are read in by the instrument cluster over the interior CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Engine compartment CAN

The signals are read in by the instrument cluster over the engine compartment CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

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Actuation of warning and indicator lamps and displays

All internal actuators (e.g. indicator and warning lamps, stepper motors of the displays, multifunction display) as well as the instrument illumination are controlled directly by the instrument cluster.

Output of warning tones and indicator tones

To output warning and indicator tones, the instrument cluster actuates the following components directly:

- Warning buzzer (A1h1)

- Audible turn signal indicator (A1h2) (turn signal clicking)

Output of signals

The instrument cluster sends the signals for requesting subfunctions via the following connections:

 Interior CAN

 Engine compartment CAN

Interior CAN

The signals are sent by the instrument cluster over the interior CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Engine compartment CAN

The signals are sent by the instrument cluster over the engine compartment CAN.

The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).