Instrument Panel, Gauges and Warning Indicators: Description and Operation

GF54.30-P-6000FQ Instrument Cluster, Component Description
MODEL 218





Shown on model 218.323
A1 Instrument cluster
A1e1 Left turn signal indicator light
A1e2 Right turn signal indicator light
A1e3 High beam indicator lamp
A1e4 Fuel reserve indicator lamp
A1e7 Brake fluid and parking brake warning lamp
A1e9 Seat belt warning lamp
A1e15 Supplemental restraint system indicator lamp
A1e16 Preglow indicator lamp (on diesel engine)
A1e17 Antilock brake system indicator lamp
A1e18 Rear fog lamp indicator lamp
A1e20 Regenerative braking system indicator lamp
A1e32 ESP(R)/ASR OFF warning lamp
A1e38 Standing light indicator lamp (as of 1.6.12)
A1e41 Electronic Stability Program warning lamp
A1e54 Coolant temperature warning lamp
A1e58 Engine diagnosis indicator lamp
A1e59 DISTRONIC warning lamp (with code (233) Distronic Plus)
A1e66 Tire pressure monitor warning lamp (with code (475) Tire pressure monitor (Premium))
A1e67 Low beam indicator lamp
A1p1 Coolant temperature gauge
A1p2 Fuel level indicator
A1p5 Tachograph
A1p8 Speedometer
A1p13 Multifunction display





Shown on model 218.374 up to 31.5.12
A1 Instrument cluster
A1e1 Left turn signal indicator light
A1e2 Right turn signal indicator light
A1e3 High beam indicator lamp
A1e4 Fuel reserve indicator lamp
A1e7 Brake fluid and parking brake warning lamp
A1e9 Seat belt warning lamp
A1e15 Supplemental restraint system indicator lamp
A1e17 Antilock brake system indicator lamp
A1e18 Rear fog lamp indicator lamp
A1e20 Regenerative braking system indicator lamp
A1e32 ESP(R)/ASR OFF warning lamp
A1e41 Electronic Stability Program warning lamp
A1e46 ESP SPORT indicator lamp (model 218.374/974)
A1e54 Coolant temperature warning lamp
A1e58 Engine diagnosis indicator lamp
A1e59 DISTRONIC warning lamp (with code (233) Distronic Plus)
A1e66 Tire pressure monitor warning lamp (with code (475) Tire pressure monitor (Premium))
A1e67 Low beam indicator lamp
A1p1 Coolant temperature gauge
A1p2 Fuel level indicator
A1p5 Tachograph
A1p8 Speedometer
A1p13 Multifunction display

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 components
^ 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)
^ Chassis CAN (CAN E)

Interior CAN
The signals are read in by the instrument cluster over the interior CAN.
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Chassis CAN
The signals are read in by the instrument cluster via the chassis CAN.
The functions that use these signals are described in the individual 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 affected components are then actuated.

Actuation of components
The instrument cluster directly actuates all internal actuators (e.g. indicator and warning lamps, stepper motors of displays, multifunction display) as well as the instrument illumination.

Output of warning tones and indicator tones
For the output of warning and indicator chimes which are requested by the systems installed in the vehicle, the instrument cluster actuates the warning buzzer (A1h1) or the acoustic function check for turn signal lights (A1h2) (output of turn signal ticking).

Output of signals
The output of signals is carried out over the following connection:
^ Interior CAN
^ Chassis CAN

Interior CAN
The signals are sent by the instrument cluster over the interior CAN.
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Chassis CAN
The signals are sent by the instrument cluster via the chassis CAN.
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).