central locking w463 operation
Central locking W463; text is intended for explanation and troubleshooting of central heating problems.
Copied from the forum: https://www.500eboard.co/forums by gerryvz Site Honcho ; with the addition of personal knowledge and experience gained.
The door locks on W463 Gs, unlike the MB sedan/coupe/convertible models of that era, are electrically operated instead of vacuum-operated. This results in a very enthusiastic, "smooth" operation of the door locks, unlike the softer up-and-down movement of the vacuum-operated locks in regular MB passenger cars. The system used is generally identical in W463 Gs produced between 1990 and 2001, and some components of the system are even used until 2018.
This message concerns this early generation of G-Wagens, produced between 1990 and approximately 2001.
For the G-Wagen, there are three main elements in the system:
The power door lock relay **Photo 3, after the 3-type keys**
The "Master" power door lock actuator on the driver's side. **Photo 2, after the 3-type keys**
The "Slave" power actuators for the passenger/rear passenger/tailgate/fuel flap. **Photo 1, after the 3-type keys**
fuel flap =>no photo
Central locking relay;
The "Master" power door lock actuator on the driver's side
The "Slave" power actuators for the passenger/rear passenger/tailgate/fuel flap
The system is generally controlled by the power door lock relay, located in the G-Wagen's relay panel. For Gs with such a locking system, for example, after 1993, this is somewhat integrated with the G's alarm/immobilizer system. The relay controls the power supply to the next important component of the system: the driver's door master lock actuator.
The driver's door actuator has five wires and signals the car's other door lock actuators to open or close. It acts as a "master" for the rest of the system. As with sedans, all actuators lock or unlock simultaneously when you press the driver's door lock button down or up.
The other actuators in the three passenger doors (on long-wheelbase Gs) and the tailgate are two-wire systems and serve as "slaves" to the main actuator in the driver's door.
It's not uncommon for these actuators to fail, and there can be several reasons for this. Sometimes it's faulty wiring, and sometimes it's a defect in the actuator itself due to age or use. The inner door panel must be removed to replace the actuator, but this is relatively simple and self-explanatory when an actuator fails. Generally, if the actuator fails, the passenger door lock will not raise or lower, while the rest of the locks in the system will function normally.
Note:
The wiring between the door and the body of the car can also
sometimes "break." Measuring is the key.
If a "master" actuator for the driver's door fails, you will notice that none of the actuators will raise or lower, or that they will lock and unlock intermittently.
In the case of LWB, the door RV is also a "master" actuator, identical in number and model.
If the control relay fails, generally none of the actuators in the system (including the master actuator for the driver's door) will raise or lower. The doors will only open manually, of course.
Always check the fuse first!!!!!
Depending on the year of the G, the door lock relay is located in the fuse and relay panel under the dashboard, under the glove compartment on the passenger side (early Gs up to approximately 1996-1997), or in the triangular relay compartment under the hood on the passenger side, just in front of the truck's bulkhead.
The door lock relay is easy to recognize because it's a small, rectangular relay about the size of a pack of cigarettes. "Kiekert" is printed in large letters on the outside. It has several white wires with a colored line, several brown wires, and a particularly striking bright blue wire with a colored line. A total of 12 wires.
You can purchase this relay from us to order. Sometimes we also have a working second-hand one in stock.
