Lumbar Support Adjustment Function - GF91.29-P-0015GW
Model 463 (except 463.342)
as of model year 2013
except code PA9 (Seat Comfort package Plus)
Function requirements, general
- Circuit 15R ON or run-on active
- No on-board electrical system limp-home mode
- No overvoltage or undervoltage
After switching off circuit 15R, the lumbar support can still be adjusted for t = 180 s (run-on time). If, during the run-on time, the circuits status or the door status is changed, the run-on time starts again.
Lumbar support adjustment, general
To achieve optimum support of the vertebral column, the backrests on the driver and front passenger seat are each equipped with a lumbar support unit.
The lumbar support unit consists of the following components:
- two air cushions
- Lumbar support pneumatic pump
- Lumbar support adjustment control unit
Function sequence for lumbar support adjustment
Setting is performed via the lumbar support adjustment switch. Pressing of the lumbar support adjustment switch is read in directly by the lumbar support adjustment control unit. The lumbar support adjustment control unit controls the corresponding inflation or deflation of the air cushions via integrated valves. The lumbar support pneumatic pump is directly actuated by the lumbar support adjustment control unit for the compressed air supply.
| Lumbar support adjustment electrical function schematic | PE91.29-P-2062-97ZGA | ||
| Overview of system components for electric seats | GF91.29-P-9992GW |