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Home >> Mercedes Benz >> 1997 >> E320 >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Anti-Theft & Central Locking System - Basic Knowledge - 210 Chassis >> Basic Knowledge >> Activating anti-theft alarm, function - GF80.50-P-2002C

Activating anti-theft alarm, function - GF80.50-P-2002C

MODEL 202 as of 1.6.97 up to 31.5.98, 208, 210.081 /281 up to 31.5.98, 210 (except 210.081 /281) from 1.3.97 to 31.5.98 with CODE (882a) Interior motion sensor (infrared) 

Fig 1: Identifying Activating Anti-Theft Alarm Components
G04635730Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Illustrated on model 210 sedan 

The anti-theft alarm (ATA)  can be activated by:

Function 

The PSE control module (combined) (A37)  receives the instruction "lock vehicle" via the CAN bus. It then activates the inputs for the exterior surface contacts and stop lamp switch.

The PSE control module (A37) also activates the interior motion sensor (IMS)  and anti-towing sensor (TS)  , unless they have been switched off before activation with the ATA interior motion sensor/anti-towing sensor/status indicator switch (S85/2)  .

When the ATA is activated the indicator LED in the ATA interior motion sensor/anti-towing sensor/status indicator switch (S85/2)  flashes.

Activation of the exterior surface contacts and stop lamp switch 

The alarm inputs to which the contacts are connected, are activated individually. An input is activated as soon as it has been in the non-actuated state for at least 10 seconds.

Activation of interior protection system (IPS) 

As soon as all the doors are closed the transmitter/receiver units for the IMS feature receive a request to switch to the ready state via the data bus. Each unit then returns a message that it is ready for operation. Alarm signals from units not ready for operation are ignored.

Activation of anti-towing sensor (TS) 

The TS input is activated as soon as it has been in the non-actuated state for at least ten seconds.

IMPORTANT

  Locking with remote control key   GF80.20-P-3005A 
  Locking/unlocking with lock switch, function Only USA ONLYJAPAN ONLY GF80.20-P-3007A 
  Deactivating anti-theft alarm (ATA), function   GF80.50-P-2003B 
  Switching off anti-towing sensor (TS), function   GF80.50-P-3024A 
  Switching off interior motion sensor (IMS), function   GF80.50-P-3025A 
  Relocking, function   GF80.20-P-4012A 
  PSE control module (combined) (A37), location/purpose/design/function   GF80.20-P-4106A 
  Inclination sensor, location/purpose/design/function   GF80.50-P-4105A 
  Alarm triggering, function   GF80.50-P-2004B 
  Interior motion sensor transmitter/receiver unit, location/purpose/design/function   GF80.50-P-4104A 
  ATA interior motion sensor/anti-towing sensor/status indicator switch, location/purpose/design/function   GF80.50-P-4103A