GF54.30-P-2011GZE Display Monitoring/Warning Messages Via Indicator Lamps, Function

GF54.30-P-2011GZE Display Monitoring/warning Messages Via Indicator Lamps, Function
- except CODE (494) USA version
- up to model year 08

Component Identification:

Turn signal indicator lamps
As an optical check the left turn signal indicator lamp and right turn signal indicator lamp is integrated in the instrument cluster. These lamps are activated differently according to function. When functioning as direction indicators, only one of the two indicator lamps is actuated at a time.
The signal for actuating the respective indicator lamp comes via the interior CAN from the steering column module (N80) to the SAM control unit (N10/8).
If one of the turn signal lamps fails, the triggered indicator lamp flashes at twice the frequency.

The left turn signal indicator lamp and right turn signal indicator lamp is actuated for hazard warning flashing and ATA flashing. The signal for actuating the lamps as hazard warning flashers comes over the interior compartment CAN from the upper control panel control unit (N72/1).
The signal for actuating the anti-theft alarm system flashing comes from the rear SAM control unit via the interior CAN.

While the direction indicator function is available only with "circuit 15 ON", the other flasher modes are also possible with "circuit 15 OFF". An acoustic signal accompanies the rhythmic flashing of the indicator lamp (A1h2).

When different demands for flasher operation are present, the system assigns hierarchical priorities in the following sequence:
^ Electronic alarm system flashers (highest priority)
^ Hazard warning flashers (2nd priority)
^ Turn indicators (3rd priority)

High beam indicator lamp
With high beam "ON" and headlamp flasher the actuation takes place via the interior CAN through the front SAM control unit (N10).

Fuel reserve indicator lamp
The fuel reserve warning lamp lights up as soon as the reserve level is reached. The actuation is closely linked to the fuel level and reserve indicator.

Brake fluid and parking brake warning lamp
This warning lamp is actuated if at the start of a journey the parking brake is not released or the minimal brake fluid level is not reached.
The signal for actuating the lamp comes from the front SAM control unit via the interior CAN.

Seat belt warning lamp
The seat belt warning lamp is actuated as follows:
^ The seat belt warning lamp lights up when "circuit 61 is ON", the vehicle speed is > 25 km/h and the driver seat belt buckle and seat belt warning switch (S68/1) is not closed. The seat belt warning lamp goes out as soon as the driver seat belt buckle and seat belt warning switch is closed.

Safety system lamps
The airbag indicator and warning lamp is actuated when there is a fault in the supplemental restraint system (SRS).
It is triggered directly by the restraint systems control unit (N2/7). The ABS indicator lamp is actuated if there is a fault in the ABS. The signal for actuating the lamp comes via the engine compartment CAN from the ESP control unit (N47-5).
The signal to actuate the lamp comes from the ME-SFI control unit (N3/10) or CDI control unit (N3/9) via the engine compartment CAN.

Light sources
The high beam indicator lamp and the preglow indicator lamp are equipped with bulbs as the means of lighting.
All the other indicator and warning lamps in the instrument cluster are equipped with light emitting diodes (LED).

LIM indicator lamp
This lamp switches on as soon as the variable speed limiter is set.

DTR warning lamp
This lamp is only fitted on vehicles with Distronic special equipment (DTR) Code 219.
When cruise control is switched on and a previously determined minimum distance to the vehicle driving in front is not achieved, the DTR warning lamp lights up in combination with an acoustic takeover tone and requests the driver to observe the traffic situation and to intervene automatically if necessary.

On the BR 164 two different instrument clusters are used depending on the Distronic special equipment fitted in each case. The instrument cluster with Distronic fitted also has a segment display in the electronic speedometer.

Tire pressure monitor warning lamp
This lamp is only fitted on vehicles with tire pressure monitor code 475.
It lights up in addition to the yellow multifunction display when a rapid pressure loss ≥0.2 bar/min is detected.
The signal to activate the lamp is sent by the TPM [RDK] control unit (N88) via the interior CAN.

Apart from the actuations described above all the indicator and warning lamps are also actuated on the lamp test with the exception of the left turn signal indicator lamp, right turn signal indicator lamp and high beam indicator lamp are also actuated on the lamp test.

In the case of some indicator and warning lamps, e.g. the ABS indicator lamp, at the same time as the actuation a fault message takes place in the multifunction display. While some categories of message can be acknowledged and canceled, the warning and indicator lamps remain on for as long as the problem remains present. These indications cannot be canceled.