Repair manual GRAMMER seat suspension MSG95EAC – November 2012
Material no. 1 277 338
2.2 Overview of faults – Pointing out possible faults that might occur
Page 2 of 4
Fault description Possible cause Troubleshooting
Seat suspension responds after the height adjustment has been
operated, but then returns to its original position.
• Free running is not given due to the webbing in the
sensor module being pinched.
• Sensor module is defective.
• Control / air reservoir is defective.
Fix the webbing in the middle of the retractor (no
contact to the black plastic roller)
Check the sensor module (Chap. 2.3, inspection
step no. 2.1).
Replace the control / air reservoir (see Chapter
3.11).
After the height adjustment the seat lowers, but continues to
vent automatically after unloading the seat suspension (driver
gets off the seat).
• Seat occupancy detection system is defective. See Diagnosis in the repair manual for the upper
seat part
Seat suspension does not respond when operating the handle
for seat height adjustment in downward direction.
• Cable harness for seat suspension is defective.
• Seat occupancy detection system is defective.
Check the cable harness for seat suspension
(Chap. 2.3, inspection step no. 5.1).
See Diagnosis in the repair manual for the upper
seat part
Seat suspension does not respond when operating the handle
for seat height adjustment in downward direction.
• Cable harness for seat suspension is defective.
• Sensor module is defective.
• No voltage.
• Control / air reservoir is defective.
Check the cable harness for seat suspension
(Chap. 2.3, inspection step no. 5.1).
Check the sensor module (Chap. 2.3, inspection
step no. 2.1).
Check and, if necessary, replace the fuse, current
path and electrical connections.
Replace the control / air reservoir (see Chapter.
3.11).
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