Outputting acoustic warning messages, function - GF54.30-P-2013S

MODEL 220 up to 31.8.99 

Acoustic turn signal indicator (A1h2): 

The acoustic turn signal indicator (A1h2) is integrated in the instrument cluster (A1). This is a contactless relay.

The turn signal flasher is always accompanied by an acoustic clicking sound generated in the same rhythm. The acoustic turn signal/flasher function varies according to the type of signal:

• Turn signal flashing:

  The trigger signal for the acoustic turn signal indicator (A1h2) comes via the interior compartment CAN from the steering column module (N80).

  If one of the turn signals fails, the acoustic turn signal indicator (A1h2) operates at twice the usual frequency. The instrument cluster (A1) receives the information through the interior compartment CAN after the signal is originally generated by the control unit governing operations within the circuit in which the issue arises.

• Hazard warning flashing:

  The trigger signal for the acoustic turn signal indicator (A1h2) function comes via the interior compartment CAN from the upper control panel control unit (N72/1).

• Anti-theft alarm system flashing:

  The trigger signal for the acoustic turn signal indicator (A1h2) function comes via the interior compartment CAN from the left front SAM control unit (N10/6).

• Special functions flashing:

  The trigger signal for the acoustic turn signal indicator (A1h2) function comes via the interior compartment CAN from the special vehicle multifunction control unit.

Warning chime: 

The instrument cluster (A1) is equipped with a speaker that can respond to various malfunctions and operating conditions by generating an acoustic warning signal at a frequency of approximately 2000 Hz with a duration of roughly 0.2 seconds.

An acoustic warning is given:

• When fault and warning messages of medium and top priority occur (in addition to the message that appears in the multifunction display panel (A1p13)).

  Further information is given in the documentation for the system concerned.

• When the seat belt warning lamp (A1e9) lights up. This indicator lamp is not available on all national versions.

  The trigger signal comes via the interior compartment CAN from the left front seat adjustment control unit with memory (N32/1) and/or from the right front seat adjustment control unit with memory (N32/2).

• The brake fluid level and parking brake warning lamp (A1e7) lights up when the vehicle starts to move before the parking brake is released. The trigger signal comes via the interior compartment CAN from the left front SAM control unit (N10/6).
• When the DTR warning lamp (A1e59) lights up.

  This lamp is triggered when the distance to the preceding vehicle falls below the defined safety margin.

  The actuating signal comes over the engine compartment CAN from the DTR control unit (N63/1).

• When the ignition key remains in the electronic ignition switch (EIS) control unit (N73) with the ignition off and the door is opened.

  The "ignition key status information" and the ignition OFF signal come via the interior compartment CAN from the EIS control unit (N73), and the door contact signal comes from the rear SAM control unit (N10/8).

• When the standing lamps are on, the ignition key is withdrawn and the driver's door is open (lights warning).

  The "ignition key status information" comes via the interior compartment CAN from the EIS control unit (N73), the door contact signal comes from the rear SAM control unit (N10/8) and the standing lamp signal from the left front SAM control unit (N10/6).

• If the child safety lock is unlocked.

  The trigger signal comes via the interior compartment CAN from the pneumatic control unit (combined) (A37).

• When specially protected vehicles exceed a speed of 210 kph. The acoustic warning signal is canceled as soon as the speed drops back below 207 kph.

  The speed displayed on the electronic speedometer (A1p8) is used.

• When the vehicle speed exceeds 120 kph (Gulf states only). The acoustic warning signal is canceled as soon as the speed drops back below 117 kph.
• When the speed set at the variable speed limiter is exceeded, e.g. owing to inertial acceleration.

  The displayed speed is used. The set maximum speed comes via the engine compartment CAN from the motor electronics control unit (N3/10) or from the CDI control unit (N3/9).