Mercedes-Benz S-class W220 - Repair manual and operation

13:11. Anticreeping alarm system

Activation of the anticreeping alarm system

Illustration for the car with the motion sensor in salon (IMS), a code 882 A26/14 — the IMS Transceiver B33 — the Sensor of an inclination of the anticreeping alarm system (ATA) H3/1 — the Siren with the additional battery N10/6 — the Left forward SAM N10/7 — the Right forward SAM N10/8 — Back SAM N70 — the Control unit of the top console N72/1 — the Control unit of the top console

N72/1s7 — the Switch indicator of work of ATA, IMS and the sensor of towage (TS) N73 — the Control unit of electronic ignition / starter S62 — the Switch of opening and closing of a cowl (ATA) S17/3 — the Switch of the left door S17/4 — the Switch of the right door S17/5 — the Switch of the left back door S88/3 — the Secret microswitch of closing of a cover of the luggage compartment S17/6 — the Switch of the right back door

Anticreeping alarm system

ATA is activated from:

- The uniform lock with PDU;
- The uniform lock with the lock switch (the USA, Japan);
- Repeated closing;
- Locking with the KEYLESS GO system (only a code 889);
- Self-activization (Belgium): In two minutes after the last locking if the driver's door is open and again is closed after extraction of a remote key;
- ATA is not activated at an open driver's door;
- Activation of ATA interrupts the previous alarm system;
- At repeated giving of food of ATA it is automatically reactivated if it was active before interruption in supply of food;
- IMS and TS can be switched off separately.

Sequence of work

The EIS (N73) control unit gives the command for CAN for locking of the car. The left forward SAM (N10/6) transfers the message "ATA is active" on CAN. Then the mentioned control units activate their entrances of the alarm system.

Activation of a siren with the additional battery (H3/1)

The left forward SAM (N10/6) activates a siren (H3/1) via the direct tire of data.

Activation of contact with an external surface

Back (N10/8) and the left forward (N10/7) Samaktiviruyut alarm system entrances to which contacts of doors are connected. The entrance is activated after, at least, 10 seconds of an inactive state.

Other functions

When obtaining by back SAM (N10/6) the message on locking of all doors and a trunk lid, are also activated TS and IMS (if they were not switched previously off).

Feedback at successful activation

At active the ATA control unit of the top console (N72) causes a light-emitting diode blinking in TS, IMS and ATA switches indicators (N72/1s7) with a frequency of 1 Hz.

Activation of the sensor of towage of TS

Forward left SAM (N10/6) transfers team of activation of TS to back SAM (N10/8). The entrance of TS is activated by back SAM after, at least, 10 seconds of an inactive state.

Only code 882: Activation of the motion sensor in IMS salon

Forward left SAM (N10/6) transfers team of activation of the IMS (A26/14) transceiver to the control unit of the top console (N70). The control unit of the top console directly activates the module via the tire of data. The module displays the availability for service.