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 3 of 4
Fault description Possible cause Troubleshooting
Seat suspension changes its position while driving, deflates and
lowers down.
• Air spring and air distributor are leaky.
• Sensor module is leaky.
• Air hose connections are leaky.
• Air hoses are leaky.
Check the air spring and the air distributor
(Chap. 2.3, inspection step no. 1.1).
Check the sensor module (Chap. 2.3, inspection
step no. 2.1).
Check all air hose connections for air leakage and, if
necessary, replace the defective air hose connection
or seal the leaky connection professionally.
Check all air hoses for air leakage and replace the
defective air hose, if necessary.
It is possible to set the seat suspension to the highest position,
but it does not deflate any longer.
• Sensor module is defective.
• Emergency programme is activated.
Check the sensor module (Chap. 2.3, inspection
step no. 2.1).
Deactivate the emergency programme (Chap. 2.3,
step no. 7.1).
Seat suspension can be lowered, but does not pump up from
the lowest position, while the compressor is running.
• Air spring and air distributor are leaky.
• Air hose connections are leaky.
• Air hoses are leaky.
• Sensor module is leaky.
• Compressor is leaky (return valve).
• Control / air reservoir is leaky.
Check the air spring and the air distributor
(Chap. 2.3, inspection step no. 1.1).
Check all air hose connections for air leakage and, if
necessary, replace the defective air hose connection
or seal the leaky connection professionally.
Check all air hoses for air leakage and replace the
defective air hose, if necessary.
Check the sensor module (Chap. 2.3, inspection
step no. 2.1).
Replace the compressor (see Chapter 3.8).
Check the control / air reservoir (Chap. 2.3,
inspection step no. 6.1).
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