Instrument cluster (IC), function - GF54.30-P-0002GM

MODEL 164.1 as of model year 2009/YoM 08 model refinement package

MODEL 164.8, 251.0/1 as of model year 2009/YoM 08

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 the following functions possible:

Function sequence for activate instrument cluster
Function sequence for indicator lamp test

Furthermore, also possible are the following functions that are described separately in the corresponding subfunctions:

Control/warning messages, function
Display operating conditions, function
Comfort displays, function
Trip computer (TRIP), function
Settings on workshop level, function

Function sequence for activate instrument cluster

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

Function sequence for indicator lamp test

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 status of circuit 15 is sent by the EZS control unit (N73) via the interior CAN (CAN B).

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 lamp (A1e15)
Preglow indicator lamp (A1e16) (with diesel engine)
ABS indicator lamp (A1e17)
Regenerative braking system indicator lamp (A1e20) (with model 164.195)
CHECK ENGINE indicator lamp (A1e26) (with code (494) USA version)
ESP®/ASR OFF warning lamp (A1e32) (as of 1.7.11 except model 164.195)
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 terminates when the engine is started (circuit 61 ON).

The following indicator lamps are not tested:

Left turn signal indicator lamp (A1e1)
Right turn signal indicator lamp (A1e2)
High beam indicator lamp (A1e3)

Instrument cluster (IC), location of components		GF54.30-P-0002-04GM
Instrument cluster (IC), block diagram		GF54.30-P-0002-01GM
Instrument cluster (IC), operating information		GF54.30-P-0002-05GM
Hybrid drive system energy flow-pictures	On model 164.195 * for USA only	GF08.30-P-0001-02GQH
Control/warning messages, function		GF54.30-P-2001GM
Display operating conditions, function		GF54.30-P-3041GM
Comfort displays, function		GF54.30-P-3043GM
Trip computer, function		GF54.30-P-3044GM
Settings on workshop level, function		GF54.30-P-2020GM