Mercedes-Benz 300SE sedan electric door lock failure

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Mileage over 224,000 km of Mercedes-Benz 300SE automobiles. The car is equipped with central locking, can only be opened by using a important now, off the bmw icom a2 with software left front or proper front door, rear door locks and trunk lid lock can not be opened.

The car uses a dual-pressure pump central locking system, which through the door controller, stress pump, lock actuators, two front door lock switches, vacuum lines and electrical wiring parts. When the lock with a critical, locking the door lock switch make contact with cheapest gm tech2 is closed, as well as signal transmitted for the door lock controller, the control pressure pump, the suction air pressure of your pump, the air strain during the vacuum pipeline, the respective lock action below vacuum actuator, driven downward movement from the lever door opener, the door lock. Once the door having a key, unlock the front door lock switch get in touch with closure, along with the signal transmitted towards the controller, the controller controls the pressure from the pump compressed air, to ensure a beneficial strain pneumatic pipeline, the part of each door actuator in optimistic strain next, the door opener will result in upward movement from the lever, the door opened.

Check the electrical door lock circuit breakers, fuses effectively. Test no matter if the stress pump. Open the trunk, take away the spare tire, you can see the correct rear of the plastic box, pneumatic pump inside a plastic box. Employing a key to open and shut the door when positioned about the hand plastic box plastic box can come to feel the vibration, the vibration time is about three ~ 4s. Applying a essential to open and lexia 3 v48 near the door, the pneumatic pump to function, indicating the door switches, door lock control circuit, door controllers no fault, the fault may well be the door actuator or pneumatic tubing.

Check out the air strain piping. The chance of execution as a result of 5 locks simultaneously harm is extremely smaller, so verify the air stress to concentrate within the pipeline. Commencing in the stress pump, paragraph by paragraph, examine the air stress piping, remove the built-in pneumatic pump plastic boxes, plastic boxes uncovered for repairing the two screws on the trunk disappeared; plastic box open and located a vacuum from atmospheric stress the pump off, find the cause of the malfunction.

Failure Examination: The car or truck central locking process, which includes the electrical technique, pneumatic techniques and mechanical products into three bmw scanner parts, the framework is a lot more complicated. In the course of troubleshooting, determined by the principle of structural failure phenomena and methods, cautious evaluation of achievable fault area, then press the failure probability degree, taking into consideration the degree of difficulty inspection, working with suitable methods, you could quickly obtain the failure to provide accurate the exact result in.

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