Indicator/warning messages, function - GF54.30-P-2001MCU
MODEL 451.3/4
Shown on code (K07) Speedometer (miles)
Function
Various alternatives are available to the instrument cluster for the output of messages:
Visual indicator/warning message via
- Indicator/warning lamps
- Multifunction display
Acoustic indicator/warning messages via
- internal tone signal generator
Visual indicator/warning messages via indicator/warning lamps
Turn signal indicator lamps
These are activated differently according to function:
- Turn signaling
- Hazard warning flasher
The turn signal flasher is always accompanied by an acoustic clicking sound generated in the same rhythm.
Turn signaling:
During turn signaling the corresponding turn signal indicator lamp is actuated. Actuation takes place via the Controller Area Network (data bus/CAN bus) (CAN) by the SAM control unit (N10/10).
If one of the following lamps malfunctions, the corresponding turn signal indicator lamp is then actuated at doubled-up frequency by the SAM control unit.
- Left turn signal lamp (E1e5)
- Right turn signal lamp (E2e5)
- Left additional turn signal lamp (E22/1)
- Right additional turn signal lamp (E22/2)
- Left brake/turn signal lights (E3e11)
- Right brake/turn signal lights (E4e11)
Hazard warning flasher:
When the hazard warning flashers are on the two turn signal indicator lamps in the instrument cluster are actuated.
High beam indicator lamp
Actuation is conducted when the high beam is switched on over CAN by the SAM control unit.
Alternator charge indicator/warning lamp
If there is a fault in the alternator (G2) the alternator charge monitoring and warning lamp is actuated. Actuation take place via the CAN from the ME control unit (N3/10).
Brake fluid and parking brake warning lamp
Actuation takes place over the CAN under the following preconditions:
- From the SAM control unit for an actuated parking brake
- From the ESP control unit (N47-5) at a minimum brake fluid level in the reservoir
- From the ESP control unit for a fault of the Electronic Stability Program (Electronic-Stability-Program)
Seat belt warning lamp
The seat belt warning lamp lights permanently for t = 6s when at circuit 15 ON the driver seat belt buckle restraint systems switch (S68/3) is not closed. A warning tone is also emitted for t = 6 s. As from a vehicle speed of 25 km/h the seat belt warning lamp starts to flash on and off for t = 60 s, when the driver seat belt buckle restraint systems switch or the front passenger seat belt buckle restraint system switch (S68/4) (when front passenger occupied) is not closed. A warning tone is emitted in parallel. The warning tone is emitted in three phases, whereby the frequency changes every 20 s.
After this, only the seat belt warning lamp is permanently actuated. The seat belt reminder warning (optical and acoustic) is terminated, as soon as the seat belt buckle restraint system switches are closed by putting on the seat belts. Furthermore, the seat belt reminder warning is also canceled, when the vehicle speed is 0 km/h and the driver door open.
The cycle is restarted:
- If at v > 25 km/h one of the seat belts which is being applied is removed again and as a result one of the seat belt buckle restraint systems switch is opened
- when the driver door is closed again and the vehicle speed is > 25 km/h
The signal for activating the seat belt warning lamp comes from the restraint systems control unit (N2/7) via CAN-B.
Airbag indicator and warning lamp
The airbag indicator and warning lamp is actuated when there is a fault in the supplemental restraint system (SRS) or the supplemental restraint system has been triggered. Actuation takes place by the restraint systems control unit via CAN.
ABS indicator lamp
The ABS indicator lamp is actuated when a malfunction occurs in the antilock brake system. Actuation takes place over CAN by the ESP control unit.
Electric steering indicator lamp
The electric steering indicator lamp is activated, when a malfunction in the electric steering is given. Actuation takes place by the power steering control unit via CAN (N68).
"CHECK ENGINE" indicator lamp
The CHECK ENGINE indicator lamp is actuated if a fault is present in the injection system, ignition system or exhaust emission system. Actuation takes place by the ME control unit via CAN.
Oil pressure warning lamp
The oil pressure warning lamp is actuated, if there is no or little oil pressure built up in the engine's oil circuit.
Actuation takes place by the ME control unit via CAN.
ESP warning lamp
Actuation takes place over CAN by the ESP control unit under the following preconditions:
- The ESP warning lamp flashes on and off during a system control intervention at a frequency of 2.5 Hz.
- The ESP warning lamp comes on when there is a system fault or when the system is switched off
Coolant temperature warning lamp
The warning lamp is actuated, when the coolant temperature is too high.
Actuation takes place by the ME control unit via CAN.
Tire pressure monitor warning lamp
Actuation takes place via CAN from the TPM [RDK] control unit (N88) under the following preconditions:
- when a manual reset has taken place or
- when a pressure loss was determined
A manual reset is indicated by repeated flashing of the tire pressure monitor warning lamp, a pressure loss through the lamp being permanently on.
Low beam indicator lamp
Actuation is conducted when the low beam is switched on over CAN by the SAM control unit.
Tank cap monitoring warning lamp
If the ME control unit detects a tank cap which is not closed, it sends a corresponding signal on the.
The instrument cluster receives the signal and actuates the tank cap monitoring warning lamp constantly.
Indicator lamp test
An indicator lamp test is carried out for "terminal 15 ON". In doing so all indicator and warning lamps are actuated with the exception of the following lamps:
- Left tern signal indicator lamp
- Right turn signal indicator lamp
- High beam indicator lamp
The indicator lamp test is terminated as soon as an engine speed of > 480 RPM is reported by the ME control unit via CAN.
Visual indicator/warning messages via the multifunction display
The multifunction display's gear indicator shows the following warning message when the instrument cluster is actuated:
- Drive authorization system:
The system is activated or a malfunction has occurred.
Actuation takes place over CAN by the SAM control unit.
- CAN failure:
flashes when the CAN is inoperative.
Actuation takes place, when the instrument cluster does not receive any data or only implausible data from the CAN.
- Shifting system:
A malfunction has occurred in the shifting system.
Actuation takes place by the automated manual transmission control unit via CAN.
Acoustic indicator/warning message over internal tone signal generator
The acoustic warning and information signals are produced by an internal tone signal generator. An acoustic feedback occurs for the following function states:
- Flasher ON
With direction flashing and warning flashing, in parallel with the visual feedback, an acoustic feedback takes place in the form of flasher clicking. Actuation takes place via the SAM control unit.
- Lights on reminder warning (warning tone)
If the driver door is opened when the standing light or low beams are switched on, a warning tone is output. The status of the left door rotary tumbler microswitch (S87/7) is read in by the SAM control unit which requests acoustic feedback.
- Door warning (warning tone)
- Daytime running lights activated or deactivated (signal tone) (with code (K06) Daytime running lights)
- Seat belt reminder warning
| Instrument cluster, component description | A1 | GF54.30-P-6000MCU |
| Restraint systems control unit, component description | N2/7 | GF91.60-P-4048MCU |
| ME-SFI [ME] control unit, component description | N3/10 | GF07.61-P-6000MCU |
| SAM control unit, component description | N10/10 | GF54.21-P-4157MCU |
| ESP control unit, component description | N47-5 | GF42.45-P-5118MCU |
| Electric steering control unit, component description | N68 For vehicles with code (V26) Power steering, EPS (FFO) |
GF46.35-P-7100MCU |
| Tire pressure monitor control unit, component description | N88 | GF40.15-P-5124MCU |