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

GF54.30-P-0002GM 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 possible the following functions:
^ Activate instrument cluster function sequence
^ Indicator lamp test function sequence

Furthermore, the following function sequences are possible which are described separately in the corresponding partial functions:
^ Indicator/warning messages, function
^ Display operating conditions, function
^ Comfort displays, function
^ Trip computer (TRIP), function
^ Settings on workshop level, function

Activate instrument cluster function sequence
The instrument cluster is activated under the following conditions:
- Unlock the vehicle using transmitter key (A8/1) with activated locator lighting (AFB)
- Open or close driver door
- Switch on standing lights or low beams
- Switch on circuit 15R
- New fault entry with the attribute "Wake display"
- Change in gear range or transmission mode

When the instrument cluster is activated the background illumination of the multifunction display and the scale illumination of the instrument cluster switch on automatically.

Additional function requirements for malfunction indicator test function sequence
^ 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 circuit status of circuit 15 is sent to the interior CAN by the interior control unit (N73).

The function of the following warning and indicator lamps is checked during the indicator lamp test:
- Fuel reserve warning light (A1e4)
- Brake fluid and parking brake 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)
- LIM function indicator lamp (variable speed limiter) (A1e33)
- ESP warning lamp (A1e41)
- Engine diagnosis indicator lamp (A1e58)
- DTR warning lamp (A1e59) (with code (219) DISTRONIC)
- Tire pressure monitor warning lamp (A1e66) (with code (470) Tire pressure monitor (basis) or code (475) Tire pressure monitor (premium))

The indicator lamp test finishes with circuit 61 On (engine start).

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