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 1 of 4
This chapter contains notes on possible faults of the seat suspension. The notes and information provided in Chapter 2.3 "Troubleshooting – Locating the fault" are intended to
ease troubleshooting of faults. The upper seat part has been inspected and found to be OK with respect to the faults described here (see Diagnosis in the repair manual for the
upper part of the seat).
Faults caused due to insufficient maintenance or improper repair are not covered here.
Note: The components mentioned above are illustrated in Chapter 2.1 and the functional components are illustrated in the repair manual of the upper seat part, if not stated
otherwise in this text.
After having eliminated a fault in the pneumatic system, the possibly activated emergency programme must be deactivated (Chap. 2.3, inspection step no. 7.1).
Fault description Possible cause Troubleshooting
Seat suspension does not respond when operating the height
adjustment in upward direction.
• Compressor is not active.
• Control / air reservoir is defective.
• Cable harness for seat suspension is defective.
• Air intake valve at the active module is defective.
• Sensor module is defective.
• No voltage.
• Switch for height adjustment
• Switch for seat occupancy detection system
Check compressor (Chap. 2.3, inspection step
no. 3.1).
Replace the control / air reservoir (see Chapter.
3.11).
Check the cable harness for seat suspension
(Chap. 2.3, inspection step no. 5.1).
Check the active module (Chap. 2.3, inspection step
no. 4.1).
Check the sensor module (Chap. 2.3, inspection
step no. 2.1).
Check and, if necessary, replace the fuse, current
path and electrical connections.
See Diagnosis in the repair manual for the upper
seat part.
See Diagnosis in the repair manual for the upper
seat part.
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