GF54.30-P-0002LE Instrument Cluster (IC), Function

GF54.30-P-0002LE Instrument Cluster (IC), Function

Instrument cluster (A1), general
The instrument cluster notifies the driver of all dynamic and static driving conditions as well as about the current condition of the systems installed in the vehicle.

In the event of any faulty or safety relevant vehicle functions, various warnings are displayed on the instrument cluster.

The following displays are incorporated into the instrument cluster in order to be able to convey information to the driver:
- Permanent displays (e.g. vehicle speed, rotational speed, tank contents)
- Indicator lamps (green, yellow or blue) (e.g. turn signals, high beams)
- Warning lamps (red) (e.g. coolant level, brake fluid level)
- Multifunction display (A1p13) (e.g. travel distance display)

The instrument cluster makes the following functions possible:
^ Activate instrument cluster function sequence
^ Function sequence for indicator lamp test

The following functions are also possible; they are described in separate documents:
^ Indicator/warning messages, function
^ Display operating conditions, function
^ Comfort displays, function
^ Trip computer, function
^ Settings on workshop level, function

Activate instrument cluster function sequence
The following events will activate the background illumination of the multifunction display and the scale illumination of the instrument cluster:
- Unlocking the vehicle with the transmitter key (A8/1)
- Open or close driver door
- Change in status "Transmitter key inserted"
- Switching on the standing lights
- Circuit 15R switch on
- Pressing the OK button (S110s6)
- Pressing the "Back" and VCS Off button (S110s4)
- Pressing the electric parking brake switch (S76/15)

After circuit 15R is switched off, the instrument cluster remains active for another t = 30 s. if a fault exists this time is increased to t = 120 s.

Additional function requirements for indicator lamp test
^ Circuit 15 On

Indicator lamp test function sequence
The indicator lamp test serves the function test of certain warning lamps and indicator lamps in the instrument cluster.
The instrument cluster automatically performs the indicator lamp test each time circuit 15 is switched on.
The EZS control unit (N73) places the status of circuit 15 on the chassis CAN (CAN E).

The function of the following warning and indicator lamps is checked during the indicator lamp test:
- Fuel reserve warning light (A1e4)
- Brake fluid warning lamp (A1e7)
- Seat belt warning lamp (A1e9)
- Airbag indicator and warning light (A1e15)
- Preglow indicator lamp (A1e16) (with diesel engine)
- ABS indicator lamp (A1e17)
- Distance warning status indication (A1e23) (on model 216 with code (219) Distronic (DTR) or with code (233) DISTRONIC PLUS)
- ESP warning lamp (A1e41)
- ESP indicator lamp (A1e42) (as of 1.6.09)
- Engine diagnosis indicator lamp (A1e58)
- DTR warning lamp (A1e59) (on model 216 with code (219) Distronic (DTR) or with code (233) DISTRONIC PLUS)
- Tire pressure monitor warning lamp (A1e66) (with code (475) Tire pressure monitor (Premium))
- Electronic parking brake warning lamp (yellow)
- Automatic lane recognition indicator lamp (on model 221 as of 1.6.09 with code (476) Automatic lane recognition)
- Attention Assist indicator lamp (on model 221 as of 1.6.09)
- PARKTRONIC warning indicator for t = 1 s (with code (220) PARKTRONIC or on model 221 as of 1.6.09 with code (230) Exclusive parking assist)
- Speed Limit Assist indicator lamp (on model 221 as of 1.6.09 with code (513) Speed Limit Assist)

The indicator lamp test terminates when the engine is started (circuit 61 ON).

The following indicator lamps are not checked for proper operation:
- Left turn signal indicator lamp (A1e1)
- Right turn signal indicator lamp (A1e2)
- High beam indicator lamp (A1e3)