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Home >> Mercedes Benz >> 2006 >> CLS 55 AMG (219.376) V8-5.5L SC (113.990) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Antitheft and Alarm Systems >> Keyless Entry >> Description and Operation >> GF80.61-P-3012TX Engine Start/Stop, Function

GF80.61-P-3012TX Engine Start/Stop, Function



GF80.61-P-3012TX Engine Start/Stop, Function
- with CODE (889) Keyless Go


Component Identification:






Function
The engine can be started or switched off by pressing the start and stop pushbutton on the selector lever.

Start engine

Function requirements
^ The transmitter key is located in the vehicle interior
^ Selector lever is in position "P" or "N"
^ Service brakes operated

Function sequence
When the start/stop button is pressed, the Keyless-Go system (KG) is woken up and the signal "Start engine" is transmitted to the EIS control unit
Parallel to this a wake-up signal is transmitted to the transmitter key. Location finding signals are transmitted by the KEYLESS-GO trunk antenna and the antennas integrated into the KEYLESS-GO control units. The position of the transmitter key is transmitted to KEYLESS-GO rear module control unit via the antenna amplifier module.

The rear module KEYLESS-GO control unit starts the check for the transmitter key. The transmitter key then transmits the access authorization code. It is relayed to the EIS control unit for checking. If the access authorization is valid, circuit 15R and circuit 15, are switched on - if not already switched on, the steering lock is unlocked via the electric steering lock control unit (N26/5) and the engine is started.

Errors occurring are output by the instrument cluster 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 the selector lever is not in position "P" when an attempt is made to start, the instrument cluster indicates "Selector lever to P or N".

Switch off engine
Function requirement
^ Selector lever is in position "P" or "N" (United States of America : Only position "P")

The position of the transmitter key is not checked

Function sequence
The signal "Switch off engine" is transmitted to the EIS control unit by pressing the start/stop button.

Parallel to this, the selector lever position is checked. The engine is switched off through circuit 15. When the driver door is closed, circuit 15R remains active and the steering is unlocked

Circuit 15R remains activated until the driver door is opened, however, only for a maximum of 30 min.

Additional actuation possibilities are illustrated in the following table.







Warning messages
^ If the selector lever is not in position "P" when the engine is switched off, an audible warning signal sounds and the following text appears in the instrument cluster: "Selector lever to P or N". If the selector lever is not in position "P" or "N" when an attempt is made to switch the engine off and the transmitter key is recognized, the text "Selector lever to P or N" appears in the instrument cluster.
^ If a front door is opened when the engine is running and the vehicle is standing still, the EIS control unit checks the key when restarting. If a transmitter key is not recognized in the interior compartment of the vehicle, the instrument cluster indicates "Key not recognized" The engine remains on, but the car should be taken to a workshop without delay. If the transmitter key is available, the vehicle should be restarted with the transmitter key.
^ If the functions described are activated via the start/stop button and a valid transmitter key is inserted in the EIS control unit, the transmitter key is given priority if the selector lever is in position "P". If running, the engine is switched off.
^ If the transmitter key can no longer be located in the interior compartment after starting the engine (system error or transmitter key not present), the instrument cluster outputs a warning message for approx. 5 s.
This is repeated every 5 km. After driving > 20 km, a continuous warning message is output and an intermittent gong sounds.

- Vehicles up to 31.5.07:
The next time the vehicle stops (v = 0 km/h), the engine is automatically switched off.

- Vehicles as of 1.6.07:
These warning messages are output until the driver shuts off the engine (no automatic switch-off of the engine).

In this case it is no longer possible to start the engine on both versions.





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