GF54.30-P-2011T Function to Display Malfunction/Warning Indication Via Indication Lights

GF54.30-P-2011T Function To Display Malfunction/warning Indication Via Indication Lights

Component Identification:

Turn signal indicator lamps
The left turn signal indicator lamp (A1e1) and right turn signal indicator lamp (A1e2) is integrated in the instrument cluster (A1) for an optical check. These are activated differently according to function. During operation as directional indicators only one of the two indicator lamps is triggered. The signal for actuating the respective indicator lamp comes from the steering column module (N80) to the rear SAM control unit with fuse and relay module (N10/2) via the Controller Area Network bus Class B (interior) CAN B. In the event of the failure of a turn signal lamp the corresponding indicator lamp in the instrument cluster (A1) is actuated at twice the frequency. With hazard warning flashing and with antitheft alarm system (ATA [EDW]) flashing, the left turn signal indicator lamp (A1e1) and right turn signal indicator lamp (A1e2) are actuated. The request for the hazard warning system is output by the upper control panel control unit (N72/1) after the hazard warning system switch (N72/1s5) is pressed.

The signal for actuating the warning lamps in the hazard warning system switch (N72/1s5) comes from the rear SAM control unit with fuse and relay module (N10/2) via CAN B. The signal to actuate the ATA flashing comes from the rear SAM control unit with fuse and relay module (N10/2) via CAN B.

While direction signaling is only possible when circuit 15 is switched ON, the other types of turn signal modes are also possible when circuit 15 is switched 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)

The turn signal confirmation when unlocking or locking the vehicle is handled like hazard warning flashing.

High beam indicator lamp (A1e3)
With "High beam ON" and headlamp flasher the actuation takes place by the driver-side SAM control unit with fuse and relay module (N10/1) via CAN B.

Low beam indicator lamp (A1e67) as of 1.6.05
After receipt of the message via CAN B with "low beam ON" the actuation takes place by the driver-side SAM control unit with fuse and relay module.

Fuel reserve indicator lamp (A1e4)
The fuel reserve indicator lamp (A1e4) lights up when the fuel level sinks to the reserve level. Control of this lamp is linked to the fuel level and reserve gage (A1p2).

Brake fluid and parking brake warning lamp (A1e7)
This warning lamp is actuated if the parking brake is not released at the start of a journey or the brake fluid drops below the minimum level.

The signal for actuating the brake fluid and parking brake warning lamp (A1e7) comes from the Driver-side SAM control unit with fuse and relay module (N10/1) via CAN B.

On the driver's side a seat belt buckle which is not inserted is detected by the driver seat belt buckle and seat belt warning switch (S68/1). The warning tone sounds for t = 6 s. It ends sooner if during this time the driver seat belt buckle and seat belt warning switch (S68/1) a seat belt buckle which has been inserted.

The seat belt warning lamp lights up when the circuit status is "Circuit 61 ON", the vehicle speed is >25 km/h, the front passenger seat occupied and child seat recognition sensor (B48) has detected a person or a child seat and the Front passenger seat belt buckle restraint systems switch (S68/4) is not closed. The seat belt warning lamp (A1e9) goes out as soon as the Front passenger seat belt buckle restraint systems switch (S68/4) is closed.

In the USA seat occupation is detected by the WSS (Weight Sensing System) control unit (N2/13).

Safety system lamps
The airbag indicator and warning lamp (A1e15) is triggered 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 (A1e17) is actuated if there is a fault in the antilock brake system (ABS).

The signal for actuating the lamp comes from the ESP, SPS [PML] and BAS control unit (N47-5) via the Controller Area Network bus Class C (engine compartment) (CAN C). Depending on country variant, vehicles are equipped with either the engine diagnosis malfunction indicator lamp (A1e58) or the CHECK ENGINE malfunction indicator lamp (A1e26). The lamp is actuated if there is a fault in the injection system, the ignition system or the exhaust emission system. The signal for actuating the lamp comes from the CDI control unit (N3/9) or ME-SFI [ME] control unit (N3/10) via CAN C.

DTR warning lamp (A1e59)
The DTR warning lamp (A1e59) lights up white when a vehicle driving in front is detected. It lights up red if the safe distance is not maintained. An acoustic signal also sounds. The signal for actuating the lamp comes from the DTR control unit (N63/1) via CAN C.

Light sources
The high beam indicator lamp (A1e3), the low beam indicator lamp (A1e67) (as of 1.6.05) and the preglow indicator lamp (A1e16) are equipped with bulbs as the means of lighting. All other indicator and warning lamps in the instrument cluster (A1) are equipped with light emitting diodes (LED).

Tire pressure monitor warning lamp (A1e66)
In addition for an output on the multifunction display (A1p13) the tire pressure monitor warning lamp (A1e66) lights up yellow when a rapid pressure loss of ≥0.2 bar/min is detected. The signal for actuating the lamp comes from the TPM [RDK] control unit (N88) via CAN B.

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 (A1e1), right turn signal indicator lamp (A1e2) and high beam indicator lamp (A1e3). As of 1.6.05 the airbag indicator and warning lamp (A1e15) is likewise no longer actuated.

Triggering and illumination of some indicator and warning lamps (such as the engine diagnosis indicator lamp A1e58) is accompanied by the appearance of a malfunction message in the right-side multifunction display (A1p13). 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.