Instrument Cluster (IC) Control Unit, Function - GF54.30-S-0013TRF
Model 447
With Code XM0 (Facelift)
Except Code ME0 (Electric motor 85 kW)
Except Code ME4 (Electric motor 145 kW)
Shown on model 447.6/7 with engine 654
Shown on model 447.6/7 without CODE JK3 (Instrument cluster with pixel-matrix display)
Shown on model 447.8 with engine 654
Shown on model 447.8
Instrument cluster, general
The instrument cluster (IC) control unit (A11) informs the driver about all dynamic and static vehicle conditions as well as about the current condition of the systems installed in the vehicle. With faulty or safety-relevant vehicle functions, appropriate warnings are output via the instrument cluster (IC) control unit.
To convey the information to the driver, the following indicators are possible in the instrument cluster (IC) control unit:
- Permanent displays (e.g. vehicle speed, engine speed, tank content)
- Indicator lamps (green, yellow or blue) (e.g. turn signals, high beams)
- Warning lamps (red) (e.g. coolant level, brake fluid level)
- Multifunction display (e.g. driver assistance systems, menu sequence)
Detailed information on the warning and indicator lamps is contained in the document "Instrument cluster (IC) control unit, component description".
The instrument cluster (IC) control unit makes the following functions possible:
- Function sequence for activating instrument cluster (IC) control unit.
- Function sequence for indicator lamp test
Function sequence for activating instrument cluster (IC) control unit
The multifunction display of the instrument cluster (IC) control unit is activated by waking up the user interface CAN (model 447.8) or the chassis CAN or interior CAN (model 447.6/7), e.g. by:
- Unlocking the vehicle through radio frequency
- Driver door opened
- Changing the status of terminal 15
After bus idle, the instrument cluster (IC) control unit remains active for 30 s. In a fault is present, this time is increased to 120 s.
Additional function requirements for indicator lamp test
- "Terminal 15 ON"
Model 447.6/7
The electronic ignition lock (EZS) control unit (N73) sends the status of terminal 15 over the chassis CAN (CAN E) to the instrument cluster (IC) control unit.
Model 447.8
The electronic ignition lock (EZS) control unit sends the status of terminal 15 over the chassis CAN, the central gateway (N93/4) and the user interface CAN (CAN HMI) to the instrument cluster (IC) control unit.
Function sequence for indicator lamp test
The indicator lamp test is used to check that certain warning lamps and indicator lamps in the instrument cluster (IC) control unit are functioning correctly. The instrument cluster (IC) control unit performs this test automatically each time terminal 15 is switched on.
The function of the following warning and indicator lamps is checked during the indicator lamp test:
- Fuel reserve indicator lamp
- Brake fluid and parking brake indicator lamp
- Seat belt warning lamp
- Parking brake indicator lamp (model 447.8)
- Parking brake indicator lamp
- Supplemental restraint system indicator lamp
- Anti-lock braking system indicator lamp
- ESP®/ASR OFF warning lamp
- Electronic Stability Program warning lamp
- Brake system warning lamp (model 447.8)
- Coolant temperature warning lamp
- Engine diagnosis indicator lamp
- DISTRONIC warning lamp (with code BA3 (Active Brake Assist) or with code ET4 (Active Distance Assist DISTRONIC))
- Tire pressure monitoring system warning lamp (with code RY2 (Tire pressure loss warning system at front axle and rear axle, wireless))
- Power steering warning lamp
The indicator lamp test is terminated when the engine is started.
The function of the following indicator lamps is not checked:
- Left turn signal indicator light
- Right turn signal indicator light
- High beam indicator lamp
- Low beam indicator lamp
- Standing lamps indicator lamp
- Rear fog lamp indicator lamp
- Front fog lamps indicator lamp
- Preglow indicator lamp
Detailed information on the warning and indicator lamps is contained in the document "Instrument cluster (IC) control unit, component description".
Additional notes and functions are described in the following documents:
| Instrument cluster (IC) control unit, operating information | GF54.30-S-0013-05TRF | ||
| Control/warning messages, function | GF54.30-S-2001TRF | ||
| Display operating conditions, function | GF54.30-S-3041TRF | ||
| Comfort displays, function | GF54.30-S-3043TRF | ||
| Trip computer, function | GF54.30-S-3044TRF | ||
| Settings on workshop level, function | GF54.30-S-2020TRF | ||
| Active service system (ASSYST PLUS), function | GF00.20-S-0004TRF | ||
| Digital tachograph (DTCO), function | With code JD6 (EU intelligent tachograph) | GF54.61-S-0003TRF | |
| Overview of system components of instrument cluster (IC) control unit | GF54.30-S-9989TRF |