Control/warning messages, function - GF54.30-P-2001GN
MODEL 166 as of model year 2016
MODEL 292
Function requirements, general
- Circuit 15R ON
The electronic ignition lock control unit (N73) transmits the status of circuit 15 via chassis CAN 2 (CAN E2) to the instrument cluster (A1).
Control/warning messages, general
The instrument cluster control/warning messages notify the driver about the current state of the systems installed in the vehicle.
The instrument cluster can issue indicator and warning messages in the following ways:
- Optical output of control/warning messages:
- Multifunction display (A1p13)
- Indicator/warning lamps
- Acoustic output of control/warning messages
- Warning buzzer (A1h1)
- Function check of turn signal lights, acoustic (A1h2)
Shown except CODE ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUG-IN))
Shown with CODE ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUG-IN))
The messages shown on the multifunction display are split up according to their level of urgency into four categories:
- Category 1 (messages with highest priority)
Category 1 messages refer to states and situations which impair safety, and they take priority over messages with lower priority. These messages are displayed and automatically archived in the message memory within a maximum of t = 2 s after they occur, and cannot be acknowledged. When they occur, a brief warning is emitted by the buzzer.
- Category 2 (messages with medium priority)
Messages in category 2 require the intervention of the driver and appear with a time delay of a maximum of t = 2 s. These messages also include operating feedback. Category 2 messages can be acknowledged. When they occur, a brief warning is emitted by the buzzer.
- Category 3 and 4 (messages with low priority)
These messages are menu displays and only serve as information for the driver (e.g. low washer fluid level). No warning chime is emitted.
Messages with low priority are overlaid by messages with high priority. If several messages with the same priority occur, the message currently displayed is cross-faded by the new message after expiry of the minimum display time.
Function sequence for control/warning messages
The instrument cluster informs the driver about the functionality and status of the installed vehicle systems. Safety-relevant system activities or system malfunctions are shown to the driver in the form of control and warning messages in the instrument cluster.
The following display options are provided for this purpose:
- Visual:
- Indicator lamps (green, yellow or blue)
- Warning lamps (red)
- Multifunction display
- Acoustic:
- Warning buzzer
- Turn signal light function check, acoustic
The instrument cluster is connected via interior CAN (CAN B) and chassis CAN 2 to the vehicle electronics.
Requests to issue control and warning messages from control units that are connected to these CAN buses are read in by the instrument cluster via interior CAN or chassis CAN 2.
Requests to issue control and warning messages from control units that are connected to the diagnostic CAN (CAN D) are sent by the electronic ignition lock control unit via the interior CAN to the instrument cluster.
The electronic ignition lock control unit sends requests to issue control and warning messages from control units that are connected with one of the following CANs via chassis CAN 2 to the instrument cluster:
- Drive train CAN (CAN C)
- Drive train sensor CAN (CAN I)
- Chassis FlexRay (Flex E) (with CODE 23P (Driving Assistance package plus))
- Hybrid CAN (CAN L) (with CODE ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUG-IN)))
- Engine CAN (CAN C1)) (with CODE ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUG-IN)))
The systems and functions listed in the table below can request the output of control and warning messages via the corresponding control unit.
| System / Function | Control unit | Connection | Output | ||
|---|---|---|---|---|---|
| Indicator lamp | Display | Acoustic | |||
| AdBlue® exhaust treatment (with CODE U77 (Blue TEC (SCR) diesel exhaust treatment)) | AdBlue® control unit (N118/5) | CAN I / CAN E1 / CAN E2 | - | X | - |
| Exterior lights (ABL) | SAM control unit (N10) | CAN B | High beam indicator lamp (A1e3) standing lights indicator lamp (A1e38) Rear fog light indicator lamp (A1e18) Low beam indicator lamp (A1e67) |
X | X |
| Left headlamp control unit (E1n9) (with CODE 640 (High Performance LED), with CODE 641 (Dynamic left-hand traffic LED headlamp)) or right headlamp control unit (E2n9), with CODE 640 (High Performance LED), with CODE 642 (Dynamic right-hand traffic LED headlamp) | CAN E2 | - | X | - | |
| BAS PLUS (with CODE 268 (Brake Assist PLUS) and CODE 269 (Brake Assist PLUS, cross-traffic (BAS+Q))) | Radar sensors control unit (N62/1) Stereo multifunction camera (A40/13) | Flex E/CAN E2 | - | X | - |
| Turn signal confirmation | SAM control unit (N10) | CAN B | Left turn signal indicator lamp (A1e1) Right turn signal indicator lamp (A1e2) |
- | X |
| Lights on warning | SAM control unit (N10) | CAN B | - | X | X |
| Adaptive Highbeam Assist (with CODE 640 (High Performance LED), with CODE 641 (Dynamic left-hand traffic LED headlamp)) or with CODE 642 (Dynamic right-hand traffic LED headlamp) | Multifunction camera (A40/11) Stereo multifunction camera (A40/13) |
CAN E2 Flex E/CAN E2 |
- | X | - |
| Active Lane Keeping Assist (with CODE 238 (Active Lane Keeping Assist)) | Stereo multifunction camera (A40/13) | Flex E/CAN E2 | - | X | - |
| Active Blind Spot Assist (with CODE 237 (Active Blind Spot Assist)) | Radar sensors control unit (N62/1) | Flex E/CAN E2 | - | - | X |
| Trailer recognition (with CODE 550 (Trailer hitch)) | Trailer recognition control unit (N28/1) | CAN B | - | X | - |
| Audio/Navigation/Communication | Radio (A2) (with CODE 505 (Radio 20 NTG5 non-navigation-capable or with CODE 522 (Audio 20 radio) or COMAND controller unit (A40/3) (with CODE 531 (COMAND APS)) | CAN B | - | X | - |
| Attention assistance system | Electronic Stability Program control unit (N30/4) | CAN E1/CAN E2 | - | X | X |
| Automatic lane recognition (with CODE 476 (Lane Keeping Assist) or with CODE 22P (Lane package)) | Multifunction camera (A40/11) | CAN E2 | - | X | - |
| Automatic transmission control | Fully integrated transmission control unit (Y3/8n4) | CAN C / CAN E1 / CAN E2 | - | X | - |
| Brake fluid level | SAM control unit (N10) | CAN B | Brake system warning lamp (A1e51) | X | - |
| Brake wear indicator | SAM control unit (N10) Rear control unit (N10/8) | CAN B | - | X | - |
| COLLISION PREVENTION ASSIST (with CODE 258 (COLLISION PREVENTION ASSIST)) | COLLISION PREVENTION ASSIST controller unit (A90) | CAN E1/CAN E2 | DISTRONIC warning lamp (A1e59) | - | X |
| AIRMATIC damping system (with CODE 489 (AIRMATIC)) | AIRmatic control unit (N51/3) | CAN E1 | - | X | - |
| Distronic Plus with Steer Assist (with CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot)) | Radar sensors control unit (N62/1) | Flex E/CAN E2 | DISTRONIC warning lamp (A1e59) | - | X |
| Anti-theft alarm system (ATA [EDW]) (with CODE 551 (Anti-theft alarm system (ATA [EDW]))) | ATA [EDW]/tow-away protection/interior protection control unit (N26/6) | CAN B | - | X | - |
| Parking system (with CODE 235 (Active Parking Assist)) | Parking system control unit (N62) | CAN E2 | - | X | X |
| Electrical power steering | Electrical power steering control unit (N68) | CAN E2 | - | X | X |
| Electronic Stability Program (ESP®) | Electronic Stability Program control unit (N30/4) | CAN E1/CAN E2 | ESP®/ASR OFF warning lamp (A1e32) (Status ESP® On/Off) Electronic Stability Program warning lamp (A1e41) (ESP® system active) | X | - |
| Parking brake warning | Electric parking brake control unit (N128) | CAN E1/CAN E2 | Parking brake indicator lamp (A1e10) parking brake warning lamp (A1e11) | X | - |
| Windshield washer system fluid level | SAM control unit (N10) | CAN B | - | X | - |
| Speed warning (with CODE 623 (Gulf States version)) | Instrument cluster (A1) | Internal | - | X | X |
| Seat belt reminder warning | Supplemental restraint system control unit (N2/10), Rear control unit (N10/8) |
CAN E1 CAN B |
Seat belt warning lamp (A1e9) | - | X |
| High voltage on-board electrical system HYBRID (with CODE ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUG-IN))) | Power electronics control unit (N129/1) Battery management system control unit (N82/2) | CAN L/CAN E1/CAN E2 | - | X | - |
| KEYLESS-GO (with CODE 889 (KEYLESS-GO) or CODE 893 (KEYLESS-GO start function)) | KEYLESS-GO control unit (N69/5) | CAN B | - | X | X |
| Coolant level | SAM control unit (N10) | CAN B | - | X | - |
| Coolant temperature | CDI control unit (N3/9) or ME-SFI control unit (N3/10) | CAN E1/CAN E2 | Coolant temperature warning lamp (A1e54) | X | - |
| Memory adjustment (with CODE 275 (Memory package) or CODE P64 (Memory package)) | Driver seat control unit (N32/1) or front passenger seat control unit (N32/2) | CAN B | - | - | X |
| Engine oil level warning | CDI control unit (N3/9) or ME-SFI control unit (N3/10) | CAN E1/CAN E2 | Engine diagnosis indicator lamp (A1e58) | X | - |
| Engine management | CDI control unit (N3/9) or ME-SFI control unit (N3/10) | CAN E1/CAN E2 | Engine diagnosis indicator lamp (A1e58) | X | - |
| Emergency call system (with CODE 348 (Emergency call/assist system) or with CODE 350 (Ecall Europe emergency call system)) | Emergency call system control unit (N123/4) (with CODE 348 (Emergency call/assist system)) Telematics services communications module (N112/2) (with CODE 350 (Ecall Europe emergency call system)) |
CAN D / CAN B | - | X | - |
| Traffic Sign Assist (with CODE 513 (Traffic sign recognition)) | Multifunction camera (A40/11) (with CODE 22P (Lane package)) Stereo multifunction camera (A40/13) (with CODE 23P (Driving assistance package PLUS)) |
CAN E2 Flex E/CAN E2 |
- | X | - |
| PRE-SAFE® | Left front reversible emergency tensioning retractor motor (A76) or Right front reversible emergency tensioning retractor (A76/1) | CAN E1/CAN E2 | Supplemental restraint system indicator lamp (A1e15) | X | - |
| PRE-SAFE® brake (with CODE 271 (Autonomous brake intervention/pedestrian protection) or CODE 300 (PRE-SAFE® brake)) | Radar sensors control unit (N62/1) Stereo multifunction camera (A40/13) | Flex E/CAN E2 | - | X | - |
| Tire pressure monitor (with CODE 475 (Tire pressure monitor)) | Tire pressure monitor control unit (N88) | CAN E2 | Tire pressure monitor warning lamp (A1e66) | X | - |
| Tire pressure loss warning (with CODE 477 (Tire pressure loss warning)) | Electronic Stability Program control unit (N30/4) | CAN E1/CAN E2 | - | X | - |
| Stationary heater (with CODE 228 (Stationary heater)) | Stationary heater control unit (A6n1) | CAN B | - | X | - |
| Supplemental restraint system | Supplemental restraint system control unit (N2/10) | CAN E1/CAN E2 | Supplemental restraint system indicator lamp (A1e15) | X | - |
| Fuel cap warning (with CODE 494 (USA version)) | CDI control unit (N3/9) or ME-SFI control unit (N3/10) | CAN E1/CAN E2 | Fuel reserve warning light (A1e4) | X | - |
| Cruise control | Electronic Stability Program control unit (N30/4) | CAN E1/CAN E2 | Segment ring Speedometer (A1p8) |
X | X |
| Blind Spot Assist (with CODE 234 (Blind Spot Assist) or with CODE 22P (Lane package)) | Integrated outer right rear bumper radar sensor (B92/6) Integrated outer left rear bumper radar sensor (B92/11) |
CAN E1/CAN E2 | - | - | X |
| Doors OPEN warning | SAM control unit (N10) Rear control unit (N10/8), Left front door control unit (N69/1), Right front door control unit (N69/2), Left rear door control unit (N69/3), Right rear door control unit (N69/4) |
CAN B | - | X | X |
| Preglow indicator (with diesel engine) | CDI control unit (N3/9) | CAN E1/CAN E2 | Preglow indicator lamp (A1e16) | - | - |
| Windshield wiper system (rear) | SAM control unit (N10) | CAN B | - | X | - |
Special case of country-dependent seat belt reminder warning
If, immediately prior to starting a journey or during a journey, a seat belt is detected to be not fitted, the instrument cluster issues a country-specific optical and acoustic seat belt reminder warning.
The supplemental restraint system control unit sends information about the status of the driver and front passenger seat belts via chassis CAN 1, the electronic ignition lock control unit and chassis CAN 2 to the instrument cluster. The instrument cluster evaluates this information for issuing a country-specific seat belt reminder warning.
The seat belt reminder message for the front passenger is only issued, if the front passenger seat is recognized as occupied.
The Supplemental Restraint System control unit sends information on the seat occupancy recognition to the instrument cluster over chassis CAN 1, electronic ignition lock control unit and chassis CAN 2.
A rear seat belt reminder warning is only issued when the total number of fitted seat belts in the rear changes during a journey or when the vehicle is at a standstill, without a rear door being opened. If the total number of fitted seat belts in the rear changes, the instrument cluster actuates the seat belt warning lamp and the warning buzzer.
The rear control unit sends information about the status of the seat belts in the rear via the interior CAN to the instrument cluster.
An issued rear seat belt reminder warning does not exert any influence on triggered restraint equipment, it is only used to notify the driver.
The manner of how the seat belt reminder warning is issued differs in whether the seat belt reminder warning is prescribed by law or not and is incorporated into the assessment through the New Car Assessment Program (NCAP).
NCAP is an assessment program for safety in new vehicles.
Countries with legally prescribed seat belt reminder:
- Extended NCAP:
USA, Canada
- Countries without seat belt reminder warning prescribed by law:
Euro NCAP: Europe, China, Australia, Japan (except model 292), South Korea and Arab States of the Gulf
In countries in which the seat belt reminder is prescribed by law (extended NCAP), the seat belt warning lamp is activated for a time interval of t = 6 ± 2 s. It is irrelevant here whether the driver seat belt is fitted or not. If the driver's seat belt is not being worn, the instrument cluster also issues an acoustic warning over the warning buzzer.
If the driver seat belt is fitted during this time interval, the acoustic warning is canceled.
An assessment of whether the front passenger seat belt is fitted or not given during this time interval.
Only after the time interval of t = 6 s has expired, does the assessment of both seat belts occur.
In countries in which the seat belt reminder warning is not prescribed by law, the seat belt warning lamp is only actuated during the indicator lamp test.
Immediately after detecting that the engine is running, the supplemental restraint system control unit evaluates the status of the driver and front passenger seat belts.
If a seat belt is defined to not be fitted, the instrument cluster actuates the seat belt warning lamp.
If the vehicle starts to move, additional successive acoustic warnings are issued once it reaches a speed of v ≥25 km/h.
Three or four acoustic warnings are issued in accordance with the seat belt reminder warning. While they are being issued the seat belt warning lamp is actuated by flashing it at a frequency of f = 2 Hz. After all the acoustic warning phases have expired the seat belt warning lamp is permanently actuated.
- Acoustic warning phase 1:
If the vehicle drives off, acoustic warning phase 1 starts to run in the background. Upon reaching a speed of v ≥25 km/h, a soft acoustic warning sounds in intervals of t = 4 s. The acoustic warning phase 1 lasts max. t = 20 s. Then acoustic warning phase 2 begins.
- Acoustic warning phase 2:
After expiry of acoustic warning phase 1 and at a speed of v ≥25 km/h, a quiet warning tone is sounded for max. t = 20 s at an interval of t = 2 s. Then acoustic warning phase 3 begins.
- Acoustic warning phase 3:
After expiry of acoustic warning phase 2 and at a speed of v ≥25 km/h, a quiet warning tone is sounded for max. t = 20 s at an interval of t = 1 s. Then acoustic warning phase 4 begins.
- Acoustic warning phase 4 (Euro-NCAP only):
Following expiry of acoustic warning phase 3 and as of a speed of v ≥25 km/h, a loud acoustic warning is sounded for maximum t = 93 s at an interval of t = 0.5 s.
Cancellation of seat belt reminder warning:
- The last acoustic warning phase is fully completed.
- The seat belt was fitted during the active seat belt reminder warning.
- When the vehicle is stationary the vehicle door on the actuating side is opened.
Seat belt reminder warning reactivation:
- Seat belt release has been detected again.
- If the vehicle is at a standstill and the driver or front passenger door is opened and then closed again.
- A new ignition cycle is detected from the time the "Engine running" or "Drive train operational" signal was set.
| Electrical function schematic of instrument cluster, control/warning message | PE54.30-P-2054-97NBA |
| Overview of system components, instrument cluster (IC) component description | GF54.30-P-9996GN |