Engine start/stop, function - GF80.61-P-3012LE
MODEL 216.3, 221.0 /1 with CODE (889) KEYLESS-GO as of model year 2009 /YoM 08
Function requirements, general
- The transmitter key (A8/1) is located in the vehicle interior
Engine start/stop, general
The engine start/stop function allows to start and stop the engine.
The engine start/stop function comprises the following subfunctions.
- Function sequence for starting engine
- Function sequence for circuit activation
- Function sequence for stopping engine
Additional function requirements for starting engine
- DIRECT SELECT gear selector switch (S16/13) is in the "P" or "N" position.
- Brake pedal actuated (Signal from ESP control unit (N47-5) (except model 221.095/195) or signal from regenerative breaking system (N30/6) (on model 221.095/195))
Function sequence for starting engine
After pressing the KEYLESS-GO start/stop button (S2/3) the EIS control unit (N73) transmits the request for an access authorization code and transmits the signal "Start engine" to the KEYLESS-GO control unit (N69/5) via the interior CAN (CAN B). The KEYLESS-GO control unit causes the following antennas to transmit a wake-up and location finding signal to the transmitter key:
- trunk KEYLESS-GO antenna (A2/35)
- Left door KEYLESS-GO antenna (A2/39) (model 216)
- Left rear door KEYLESS-GO antenna (A2/39) (model 221)
- Right door KEYLESS-GO antenna (A2/41) (model 216)
- Right rear door KEYLESS-GO antenna (A2/41) (model 221)
- Center console KEYLESS-GO antenna (A2/60)
- Interior compartment KEYLESS-GO antenna (A2/61) (up to 31.8.10)
The transmitter key transmits its access authorization code and its position to the rear window antenna amplifier module (A2/12), which relays it to the KEYLESS-GO control unit. The access authorization code is transmitted to the EIS control unit via the interior CAN.
If the access authorization code is valid and the transmitter key is located in the vehicle interior, c. 15R and c. 15 are switched on and the motor for the ME-SFI control unit (N3/10) (on gasoline engine) or CDI control unit (N3/9) (on diesel engine) is started.
Error messages in instrument cluster (A1):
If a transmitter key is not recognized in the interior compartment when starting, the instrument cluster indicates "Key not recognized" and the start attempt is interrupted (circuit 15R and circuit 15 remain off).
- If, during a start attempt, the gear selector switch DIRECT SELECT is not in position "P" or "N", a corresponding note is indicated in the instrument cluster.
The display request in the instrument cluster is transmitted by the EIS control unit to the central gateway control unit (N93) via the interior CAN. The central gateway control unit routes this request to the instrument cluster via the central CAN (CAN F).
Each time the vehicle is started or if a door is opened with the engine running, the EIS control unit requests the KEYLESS-GO control unit to check the transmitter key.
If then a transmitter key is not recognized in the passenger compartment, the instrument cluster displays the message "Key not recognized" in red and a warning tone is output via the warning buzzer (A1h1).
Function sequence for circuit activation
If the foot brake is not depressed when the KEYLESS-GO start/stop button is actuated, only circuit 15R is switched on. Repeated actuation activates circuit 15. Further repeated actuation switches circuit 15R and circuit 15 off. If the driver door is closed, circuit 15C remains active for t = 30 min.
Function sequence for stopping engine
When the KEYLESS-GO start/stop button is pressed, the signal "Stop engine" is transmitted to the EIS control unit and then c. 15 is switched off and the motor is switched off by the ME-SFI control unit or CDI control unit. If the driver door is closed, circuit 15R remains active for t = 30 min.
Switching off engine depending on vehicle speed:
- Speed v < 3 km/h: Switch off immediately
- Speed v > 3 km/h: Switch-off occurs only after pressing KEYLESS-GO start/stop button for longer than t > 3 s
| Function schematic for electric KEYLESS-GO engine start/stop | Model 216 | PE80.61-P-2052-97CAA | |
| Model 221 | PE80.61-P-2052-97SAA | ||
| Component description for instrument cluster | A1 Model 216.3, model 221 (except 221.095/195) |
GF54.30-P-6000LE | |
| Model 221.095/195 | GF54.30-P-6000LEH | ||
| Component description for CDI control unit | N3/9 Model 221 with engine 629.9 |
GF07.16-P-6000OA | |
| Model 221 with engine 642.8 | GF07.16-P-6000OHS | ||
| Model 221 with engine 642.9 | GF07.16-P-6000OHL | ||
| Component description for ME-SFI [ME] control unit | N3/10 With engine 156 |
GF07.61-P-6000MAS | |
| On model 221 with engine 272 (except 272.974) | GF07.61-P-6000MIS | ||
| Model 221 with engine 272.974 | GF07.61-P-6000MEH | ||
| With engine 273 | GF07.61-P-6000MLS | ||
| With engine 275 | GF07.61-P-6000MOS | ||
| Model 221 with engine 276 | GF07.61-P-6000MMB | ||
| On engine 157, 278. | GF07.61-P-6000MMC | ||
| Component description for regenerative braking system control unit | N30/6 On model 221.095/195 |
GF42.22-P-1100LEH | |
| Component description for ESP control unit | N47-5 Model 216.3, 221 (except 221.095/195) |
GF42.45-P-5118LE | |
| Component description for KEYLESS-GO control unit | N69/5 | GF80.61-P-4204LE | |
| EZS control unit, component description | N73 | GF80.57-P-6003LE | |
| Component description for central gateway control unit | N93 | GF54.21-P-4170LE |