Activation of the anti-theft alarm
Illustration for a car with a motion sensor inside the cabin (IMS), code 882
A26/14 - IMS transceiver; B33 - Anti-theft alarm tilt sensor (ATA); H3/1 - Siren with additional battery; N10/6 - Left front SAM; N10/7 - Right front SAM; N10/8 - Rear SAM; N70 - Upper console control unit; N72/1 - Upper console control unit; N72 / 1s7 - Switch-indicator of the operation of ATA, IMS and towing sensor (TS); N73 - Electronic ignition / starter control unit; S62 - Switch for opening and closing the hood (ATA); S17 / 3 - Left door switch; S17 / 4 - Right door switch; S17 / 5 - Left rear door switch; S88 / 3 - Hidden microswitch for closing the luggage compartment lid; S17/6 - Right rear door switch
Anti-theft alarm
ATA is activated from:
- Single lock with remote control;
- single lock with lock switch (USA, Japan);
- re-closing;
- Locking with KEYLESS GO (only code 889);
- Self-Activation (Belgium): Two minutes after the last lock, if the driver's door is opened and closed again after removing the remote key;
- ATA is not activated when the driver's door is open;
- Activation of the ATA interrupts the previous alarm;
- When power is applied again, the ATA is automatically reactivated if it was active before the power supply was interrupted;
- IMS and TS can be turned off separately.
Sequence of work
EIS control unit (N73) sends a command to CAN to lock the vehicle. Left front SAM (N10/6) sends a message «ATA active» on CAN. The affected control units then activate their alarm inputs.
Siren activation with extra battery (H3/1)
Left front SAM (N10/6) activates the siren (H3/1) via a direct data bus.
External surface contact activation
Rear (N10/8) and left front (N10/7) SAMs activate the alarm inputs to which the door contacts are connected. The input is activated after at least 10 seconds of inactivity.
Other features
When received by rear SAM (N10/6) lock messages for all doors and boot lid, TS and IMS are also activated (unless they were previously turned off).
Feedback on successful activation
With ATA active, the overhead console control unit (N72) causes the LED in the TS, IMS and ATA indicator switches to flash (N72/1s7) with a frequency of 1 Hz.
TS towing sensor activation
Front left SAM (N10/6) transmits to rear SAM (N10/8) TS activation command. The TS input is activated by the rear SAM after at least 10 seconds of inactivity.
Code 882 only: IMS motion sensor activation
Front left SAM (N10/6) transmits to the upper console control unit (N70) IMS transceiver activation command (A26/14). The overhead console control unit activates the module directly via the data bus. The module indicates its readiness for operation.