System Working Principle; Height Adjustment - Geely EC718 2009 Workshop Manual

11-400 Electric Seats

11.11.3 System Working Principle

11.11.3.1 System Working Principle
Seat Adjuster Switch
seat adjuster switch motor to provides the power and ground
circuit for the selected seat, drives motor to adjust the seat.
Motor
All seats motors work independently. The motor includes an
electronic circuit breaker (PTC). The circuit breaker
disconnects the circuit in overload situation and only resets
when the circuit voltage is cut off. There are three seat
adjustment motors. They are forward and backward
adjustment motor, height adjustment motor, and seat back
adjustment motor. forward and backward adjustment motor
moves the whole seat forward and backward. Height
adjustment motor moves the seat cushion upward or
downward. Seat back adjustment motor moves the seat back
forward or backward.
Forward and Backward Adjustment
When operating the seat adjustment switch to move whole seat
forward, the battery positive voltage passes through the switch
contacts and the motor forward control circuit to the motor. The
ground circuit is through the backward switch contacts and the
motor backward control circuit. Motor runs in order to drive the
entire seat forward until the switch is released. Move the seat
backward is similar. The difference is that the positive battery
voltage and ground circuit is through the opposite circuits, to
reverse the motor operation.

Height Adjustment

When the operating the seat adjustment switch to move the
seat cushion upward, the battery positive voltage passes
through the switch contacts and the motor upward control
circuit to the motor. The ground circuit is through the downward
switch contacts and the motor downward control circuit. Motor
runs in order to drive the seat cushion upward until the switch
is released. Move the seat downward is similar. The difference
is that the positive battery voltage and ground circuit is through
the opposite circuits, to reverse the motor operation.
Seat Back Adjustment
When operating the seat adjustment switch to move the seat
back forward, the battery positive voltage passes through the
switch contacts and the motor forward control circuit to the
motor. The ground circuit is through the backward switch
EC718/EC718RV EC715/EC715RV 10/2009
contacts and the motor backward control circuit. Motor runs in
order to drive the seat back forward until the switch is released.
Move the seat backward is similar. The difference is that the
positive battery voltage and ground circuit is through the
opposite circuits, to reverse the motor operation.
Seat Heating (If Equipped)
BCM receives the voltage signal from CAN bus. when the
battery voltage is greater than 10.7 V, and the ignition lock
switch is at the "ON" position, the seat heater enable relay is
activated, seat heating is able to work. at this time if the seat
heating switch is pressed, the seat heating starts. When the
battery voltage is less than 10.3 V, BCM will disconnect the
heated seats relay, seat heaters are not allowed work.
Body Electric