LEMON Manuals: Even more car manuals for everyone
Home >> Mercedes Benz >> 2005 >> G55 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Battery, Data Bus, Fuse & Relay, Electrical -- Function & Locations -- G-Class (463) >> Basic Knowledge >> Control/warning messages, function - GF54.30-P-2001G

Control/warning messages, function - GF54.30-P-2001G

MODEL 463.306/336/346 as of model year 2011/YoM 10 

MODEL 463.202/222/236/237 as of model year 2009/YoM 08 

MODEL 463.247/248/249/254 up to 31.8.08 as of model year 2007 model year 07.5, modification year 07 

MODEL 463.270/271/303/340/341 as of model year 2007 model year 07.5, modification year 07 

Fig 1: Identifying Control/Warning Messages Function Diagram
G07742108Courtesy of MERCEDES-BENZ USA

Control/warning messages, general 

The instrument cluster indicator and warning messages notify the driver about the current states of the systems installed in the vehicle. Various alternatives are available to the instrument cluster for the output of messages:

The messages output in the multifunction display are distinguished by:

In the process messages with high priority have priority over messages with lower or lowest priority.

For certain messages with high priority in addition a warning message is output which is shown against a red background. Messages of lower or lowest priority can be confirmed via the instrument illumination variable resistor (A1r1). They are then stored in the message memory. Messages with high priority cannot be confirmed and are stored automatically in the message memory. The messages can be scrolled through in the service menu.

The following systems and functions can request indicator/warning messages via the instrument cluster:

Systems:

Functions:

Additional function requirements, function sequence for limiter control messages (without code (ZU8) USA version) 

Function sequence for limiter control messages (without code (ZU8) USA version) 

An active limiter function is shown in the multifunction display. After adjusting the variable speed limiter the next time the cruise control switch (S40) is pressed (resume) the speed last set is shown in the multifunction display for t = 5 s.

If the variable speed limiter is activated via the cruise control switch, a warning tone is output when the set speed is exceeded.

Function sequence for ESP® control/warning messages 

If the ESP® is deactivated using the ESP OFF switch (N72/1s1) when the engine is running, this is indicated by the ESP warning lamp (A1e41) being permanently on (up to 31.8.10) or ESP OFF indicator lamp (A1e30). In addition for fault messages from the ESP control unit a warning message can be output via the multifunction display.

Additional function requirements for ABS indicator/warning messages 

Additional function requirements for ESP indicator/warning messages 

Function sequence for ABS indicator/warning messages 

If the ABS is deactivated via differential lock switch group (S76), the ESP warning lamp and ABS indicator lamp (A1e17) are actuated permanently and warning message appears in the multifunction display.

If there is a fault in the ABS, the ESP control unit transmits a corresponding signal to the instrument cluster via the drive train CAN. As a result of this the instrument cluster actuates the ABS indicator lamp and issues a warning message via the multifunction display.

Additional function requirements for SRS indicator/warning messages 

Function sequence for SRS indicator/warning messages 

If a fault is found by the restraint systems control unit, the airbag indicator and warning lamp (A1e15) is actuated by the instrument cluster.

In addition a message is displayed via the multifunction display.

Additional function requirements for warning messages of exterior lights 

Function sequence for warning messages of exterior lights 

If one or more defective lamps are detected by the following control units, this is shown via a message in the multifunction display:

Additional function requirements for tire pressure monitor warning messages (for model 463.237/249/271 and model 463.202/222/236/248/270/303/306/336/340/341/346 with code (RY6) Tire pressure monitor (TPM)) 

Function sequence for tire pressure monitor warning messages (for model 463.237/249/271 and model 463.202/222/236/248/270/303/306/336/340/341/346 with code (RY6) Tire pressure monitor (TPM)) 

If a relevant pressure loss in one or more tires by the tire pressure monitor control unit via the tire pressure sensors a message appears in the multifunction display and the tire pressure monitor warning lamp (A1e66) is actuated.

Additional function requirements for audio/communication/navigation system control messages 

Function sequence for audio/communication/navigation system warning messages 

The information on the audio/communication and navigation systems fitted in the vehicle is shown in the multifunction display.

The instrument cluster receives the information via the interior CAN.

Additional function requirements for AdBlue® exhaust after-treatment warning messages (for model 463.306/336/346 with engine 642.886) 

Function sequence for AdBlue® exhaust after-treatment warning messages (for model 463.306/336/346 with engine 642.886) 

The exhaust gases expelled from the engine are cleaned in an oxidation catalytic converter, a diesel particulate filter (DPF) and a reduction catalytic converter (Selective Catalytic Reduction (SCR) catalytic converter).

The AdBlue® reducing agent is also injected upstream of the SCR catalytic converter, and is converted to ammonia (NH 3 ) through thermal decomposition (heat-induced chemical reaction) and hydrolysis (water-induced chemical reaction).

The supply of required AdBlue® reducing agent in the AdBlue® tank is monitored by the following sensors, the signals of which can be directly read in by the AdBlue® control unit:

If the "Reserve" fill level in the AdBlue® tank is reached, this is indicated to the driver by an acoustic signal.

If the "Empty" fill level is reached in the AdBlue® tank, a plausibility check on the "Empty" fill level is carried out using a computer model. If the plausibility check also results in an "empty" fill level, an audible signal is given, an entry is made in the fault memory of the control unit (CDI), and the engine diagnosis indicator lamp (A1e58) on the instrument cluster lights up. The driver then has up to 20 engine starts available, with an assumed trip distance of 32 kilometers in each case. The number of remaining starts is displayed in the instrument cluster. The vehicle can no longer be started after the last remaining "Start".

The requirements for this are sent by the AdBlue® control unit over the drive train sensor CAN, CDI control unit and the drive train CAN to the instrument cluster.

Additional function requirements for lights on reminder 

Lights on reminder function sequence 

Additional function requirements for parking brake on reminder warning 

Parking brake warning function sequence 

If with circuit 15C OFF and switched-on parking light/low beam the driver door or front passenger door is opened, an acoustic warning and a message takes place in the multifunction display via the instrument cluster.

If the parking brake inspection switch is operated at a speed of v > 5 km/hS12, an acoustic warning is output via the instrument cluster.

In addition a message appears in the multifunction display.

In addition the brake fluid, parking brake and brake distribution warning lamp (A1e7) is actuated.

The status of the parking brake indicator switch is read in by the front SAM and transmitted to the instrument cluster via the interior CAN.

Additional function requirement for speed warning (in Gulf states only) 

Function sequence for speed warning (in Gulf states only) 

An acoustic warning is output by the instrument cluster at speeds of v > 120 km/h.

The wheel speeds are determined via the left front rpm sensor (L6/1), the right front rpm sensor (L6/2), the left rear rpm sensor (L6/3) and right rear rpm sensor (L6/4).

The speed sensor signals are read in by the ESP control unit and transmitted to the instrument cluster via the drive train CAN. The instrument cluster calculates the vehicle speed via the wheel speeds.

Additional function requirements for function sequence of key reminder 

Function sequence for key reminder 

When the function requirements are met an acoustic and optical warning is output by the instrument cluster.

Additional function requirements for national seat belt reminder warning 

IMPORTANT As of 1.9.09, the status of the front passenger seat belt is also evaluated for issuing a warning message.

National seat belt reminder warning function sequence 

The following signals are evaluated by the restraint systems control unit:

The rear SAM reads in signals from the restraint systems control unit discretely and passes these on to the instrument cluster.

The instrument cluster outputs a national, visual and acoustic warning.

IMPORTANT The seat belt reminder message for the front passenger is only issued, if the front passenger seat is recognized as occupied.

1st warning tone phase:

A quiet gong is sounded for a maximum t = 20 s at an interval of t = 4 s.

After this a change is automatically made to the 2nd warning tone phase.

2nd warning tone phase:

A quiet gong is sounded for a maximum t = 20 s at an interval of t = 2 s.

After this a change is automatically made to the 3rd warning tone phase.

3rd warning tone phase:

A quiet gong is sounded for a maximum t = 20 s at an interval of t = 1 s.

After this a change is automatically made to the 4th warning tone phase.

4th. warning tone phase:

A loud gong is sounded for maximum t = 93 s at an interval of t = 0.5 s.

IMPORTANT The seat belt warning lamp (A1e9) flashes during a warning tone output. Once all the acoustic warning phases have been passed through it is actuated permanently.

IMPORTANT The acoustic warning only takes place from a vehicle speed of v > 25 km/h.

The seat belt reminder warning is deactivated under the following circumstances:

The seat belt reminder warning is activated again under the following circumstances:

Additional function requirements for brake fluid level warning messages 

Function sequence for brake fluid level warning messages 

A too low fill level in the brake fluid reservoir is detected by the brake fluid indicator switch (S11) and transmitted from the front SAM to the instrument cluster via the interior CAN. As a consequence the instrument cluster outputs a corresponding warning message via the multifunction display.

Turn signal confirmation function sequence 

The acoustic feedback via the activated turn signaling or the switched-on hazard warning system is realized via the function check of the turn signal light.

The visual feedback takes place via the left turn signal indicator lamp (A1e1) and right turn signal indicator lamp (A1e2).

Additional function requirements for tank cap open warning message (with code (ZU8) USA version) 

Function sequence for tank cap open warning message (with code (ZU8) USA version) 

If the instrument cluster receives a message at a vehicle speed of v > 5 km/h from the ME-SFI control unit or from the CDI control unit via the drive train CAN that the tank cap is still open, the fuel reserve warning lamp (A1e4) flashes at a frequency of f = 2.5 Hz. At the same time the message "Tank cap open" appears in the multifunction display.

Additional function requirement for fuel level sensor warning message (with code (ZU8) USA version) 

Function sequence for fuel level sensor warning message (with code (ZU8) USA version) 

A firmly attached fuel level sensor is detected by comparing any change in the fill level of the fuel tank with the calculated composite mileage.

If the instrument cluster detects a faulty condition, the fuel gauge is gradually moved to the zero point and the fuel reserve warning lamp is switched off if necessary.

The systems (e.g. trip computer) which use the fuel consumption information are informed about the faulty status.

The information required to detect a jammed fuel level sensor is obtained by the instrument cluster as follows:

Additional function requirements for coolant temperature warning 

Coolant temperature warning function sequence 

The coolant temperature is recorded by the coolant temperature sensor (B11/4). The signals from the coolant temperature sensor are read in by the CDI control unit or by the ME-SFI control unit.

The CDI control unit or ME-SFI control unit passes on the information via the drive train CAN. An optical and acoustic warning message is output in the instrument cluster at a coolant temperature of T > 130 °C.

Additional function requirements for engine control warning message 

Function sequence for engine control warning message 

If a malfunction occurs in the diesel fuel injection system, in the ignition system or in the exhaust system, the engine diagnosis indicator lamp (A1e58) is actuated. The signal for actuating the engine diagnosis indicator lamp is transmitted by the ME-SFI control unit or by the CDI control unit to the instrument cluster via the drive train CAN.

  Component description for instrument cluster A1 GF54.30-P-6000G 
  Radio control panel, component description A2
Model 463.303/306/336/340/341/346 with code (EF5) MB Audio 20 CD radio, (NTG 2.5)		 GF82.60-P-3116G
  Component description for COMMAND operating, display and controller unit A40/3
Model 463.202/222/236/237/270/271/303/306/336/340/341/346 with code (EU1) COMMAND, APS except code (ZJ1) Japan version		 GF82.85-P-3134GB
    Model 463.236/270 with code (EU1) COMMAND, APS with code (ZJ1) Japan version GF82.85-P-3134GAJ
  Component description for CDI control unit N3/9
On engine 642.9 in model 463.303/340/341, On engine 642.8 in model 463.306/336/346		 GF07.16-P-6000GZ
  ME-SFI control unit, location/task/design/function N3/10
On engine 113 in model 463.270/271		 GF07.61-P-5000AM
  Component description for ME-SFI [ME] control unit N3/10
On engine 273 in model 463.202/222/236/237		 GF07.61-P-6000G
  Component description for front SAM control unit with fuse and relay module N10/1 GF54.21-P-6070G 
  Component description for rear SAM control unit with fuse and relay module N10/2 GF54.21-P-6030G 
  Component description for trailer recognition control unit N28/1
With code (Q55) Trailer hitch ball head, low reinforced:		 GF31.19-P-4050G
  Component description for ESP control unit N30/4 GF42.45-P-5118G
  Component description for left front door control unit N69/1 GF72.29-P-4141G
  Component description for right front door control unit N69/2 GF72.29-P-4142G
  Upper control panel control unit, component description N72/1 GF54.21-P-6040G 
  Component description for tire pressure monitor control unit N88
For model 463.237/249/271 and
Model 463.202/222/236/248/270/303/306/336/340/341/346
With code (RY6) Tire pressure monitor (TPM)		 GF40.15-P-5124G
  Component description for exhaust after-treatment control unit N118/5
On model 463.306/336/346 with engine 642.886.		 GF14.40-P-3030G
  Wheel sensor, component description A69/1, A69/2, A69/3 and A69/4
For model 463.237/249/271 and
Model 463.202/222/236/248/270/303/306/336/340/341/346
With code (RY6) Tire pressure monitor (TPM)		 GF40.15-P-5126G
  Light sensor component description B32/1 GF54.21-P-6001G 
  Wheel rpm sensor, component description L6/1, L6/2, L6/3, L6/4 GF42.45-P-5134G
  Component description for supplemental restraint system control unit N2/7 GF91.60-P-4068G
  Parking brake indicator switch, component description S12 GF42.20-P-5002G
  Seat belt buckle switch, component description S68/3, S68/4 GF91.60-P-4045G
scientia non olet · About LEMON Manuals