PRE-RELEASE
Motor, electrically operated window lift, front (164FL/FR)
| Motor, electrically operated window lift, front (164FL/FR) |
| Location |
Motor, electrically operated window lift, front, left (164FL)
Motor, electrically operated window lift, front, right-hand (164FR)
| Main task |
Raise and lower the door window. Indicate the position of the motor (variants with pinch protection).
| Type |
The electric window motor contains a 2-pole motor and worm gear. The polarity of the motor is reversed to run it in the opposite direction. In variants with pinch protection, the motor also has 2 Hall sensors that indicate the position of the motor. The Hall sensors are mounted by the motor shaft 90° from each other. The motor shaft has a 2-pole rotor.
| Connect |
Electric motor
The motor is connected with 2 wires to the door control module. (DDM)
Hall sensor
The sensors are connected by 4 wires to the door control module. The sensors have a common 4.7 V power supply and common ground. 2 signal wires supply each sensor with B+ via an integrated resistor. When the South pole of the magnet passes the sensor, the sensor shorts the B+ feed to ground.
The control module inputs are digital. A voltage greater than 2 V is regarded as "OFF" and lower than 2 V as "ON". The control module calculates the position of the window by counting the number of changes between "ON" and "OFF". The control module will count 2 changes per revolution of the motor from each Hall sensor. Since the sensors are displaced by 90°, the control module will detect a total of 4 changes, displaced by 90°, each revolution.
Motor without pinch protection
| Pin number | Signal type | Description |
| 1 | B+ to open the window. Grounded for closing | Motor |
| 2 | B+ to close the window Grounded to open the window | Motor |
Motor with pinch protection
| Pin | Signal type | Description |
| 1 | B+ to close the window Grounded for opening | Motor |
| 2 | Square wave B+/ground | Hall sensor 2 |
| 3 | Ground | Common ground for both Hall sensors |
| 4 | B+ to open the window Grounded for closing | Motor |
| 5 | Square wave B+/ground | Hall sensor 1 |
| 6 | 4.7 V | Common power supply for both Hall sensors |
Diagram
